How it Works
Flowserve
Loading...
400MD
User Manual
106 pgs2.3 Mb1

Flowserve 400MD User Manual

Download
Page 1
USER INSTRUCTIONS
Logix 3400MD Digital Positioner
FCD LGENIM3405-02 11/13
Installation &
Reference Guide
Page 2
Page 3
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Contents
Introduction 5 1 Logix 3400MD Digital Positioner Description 10
2 Installation Overview 13
3 Bench Configuration (Optional) 15
4 Pre-installation Considerations 16
5 Logix 3400MD Digital Positioner Installation 18
6 Logix 3400MD Digital Positioner Configuration 23
6.2 Logix 3400MD Digital Positioner Communications 24
7 Operation 29
8 Configuration Description 29
3
Page 4
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
8.13 PID Function Block 50
8.14 Link Objects 54
8.15 View Objects 55
8.16 Alert Objects 61
8.17 Alarm and Event Reporting 62
8.18 Trend Objects 65
8.19 Domain Objects 65
8.20 Device Description 65
8.21 Object Dictionary 66
8.22 System Management 66
8.23 Network Management 69
8.24 Logix 3400MD Digital Positioner Variable Enumeration 70
9 Calibration 77
9.1 Introduction 77
9.2 Overview 77
9.3 Calibration 78
10 Troubleshooting 80
10.1 Introduction 80
10.2 Overview 80
10.3 Device Troubleshooting 81
10.4 Device Diagnostics 83
10.5 Block Configuration Errors 84
10.6 Clearing Block Configuration Errors 86
10.7 Additional Troubleshooting 87
10.8 Simulation Mode 87
10.9 Logix 3400MD Digital Positioner 89
10.10 Internal Positioner Issues 90
10.11 Stroke Characterization 94
10.12 Characterization Procedure 95
10.13 Initiating a Valve Signature 95
10.14 Signature Procedure 97
10.15 Logix 3400MD Function Block Execution Times 98
10.16 Logix 3400MD Diagnostic Parameters Enabled with TEST_MODE 99
10.17 Logix 3400MD Fault States 100
10.18 Logix 3400MD Digital Ouput (DO) Operation 100
10.19 Logix 3400MD Digital Input (DI) Operation 101
11 Software Maintenance 101 Appendix A: Sample Configuration Record 101 Glossary 101
4
Page 5
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Introduction
Copyright, Notices and Trademarks
While this information is presented in good faith and believed to be accurate, Flowserve disclaims the implied warranties of merchantability and fitness for a particular purpose and makes no express warranties except as may be stated in its written agreement with and for its customer.
In no event is Flowserve liable to anyone for any indirect, special or consequential damages. The information and specifications in this docu­ment are subject to change without notice.
™
Logix
3400MD digital positioner and ValveSight™ is a trademark of Flowserve Corporation.
FOUNDATION dows® is a registered trademark of Microsoft Corporation.
Windows NT
NI-FBUS Configurator
™
Fieldbus is a trademark of the Fieldbus Foundation. Information Mapping is a trademark of Information Mapping Inc. Win-
™
, Windows XP™ , Windows VISTA™ and Windows 7™ are trademarks of Microsoft Corporation.
™
is a trademark of National Instruments.
About This Manual
This manual is intended as a ‘how to’ reference for installing, wiring, configuring, starting up, and operating the Valtek Logix 3400MD digital positioner with FOUNDATION fieldbus (FF).
This manual provides detailed information for installation and operation to assist first-time Logix 3400MD digital positioner users.
This manual is written as the technical guide for the experienced fieldbus user. It does not contain information on fieldbus communications and usage. It is recommended that a user new to fieldbus attend the training courses that are taught by the Fieldbus Foundation to obtain the background knowledge that is needed to operate a fieldbus segment.
The sections of information contained in the manual follow this order:
• Background and pre-installation
• Logix 3400MD digital positioner mechanical and electrical installation
• Logix 3400MD digital positioner configuration
• Operation
• Reference information
Symbol Abbreviations
This caution symbol on the equipment refers the user to the installation manual for additional information. This symbol appears
next to required information in the manual.
ATTENTION, Electro-Static Discharge (ESD) hazard. Observe precautions for handling electrostatic sensitive devices.
Earth Ground. Functional earth connection. NOTE: This connection shall be bonded to protective earth at the source of supply in
accordance with national and local electrical code requirements.
Abbreviations
AI Analog Input AO Analog Output
5
Page 6
AWG American Wire Gauge DB Database DD Device Description DDL Device Description Language DI Digital Input DO Digital Output EEPROM Electrically Erasable Programmable Read Only Memory EMI Electromagnetic Interference FB Function Block FBAP Function Block Application Processor FF FOUNDATION fieldbus IS Input Selector mA Milliamperes MD Maintenance and Diagnostics mmHg Millimeters of Mercury LAS Link Active Scheduler MSP Manufacturer’s Signal Processing NM Network Management NMA Network Management Agent NMIB Network Management Information Base NPT National Pipe Taper (pipe threads) NV Non-volatile OD Object Dictionary OOS Out-of-service OS Output Splitter PC Personal Computer (workstation) PID Proportional Integral Derivative PROM Programmable Read Only Memory PWA Printed Wiring Assembly RAM Random Access Memory RFI Radio Frequency Interference ROM Read Only Memory SM System Management SMA System Management Agent SMIB System Management Information Base VCR Virtual Communication Reference VDC Volts Direct Current VFD Virtual Field Device XDTBMAIN Main Transducer Block XDTBTECH Tech Transducer Block XDTBMD MD Transducer Block
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
XMTR Transmitter
6
Page 7
Definitions
Term Abbrev. Defininition
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Alarm
Application
Block
Configuration (of a system or device)
Device
Device Description DD Description of FBAPs within a device.
Device Description Language A standardized programming language (similar to C) used to write device descriptions.
Device Tag User-defined identifier for device.
Event
FOUNDATION fieldbus FF
Function Block FB
Function Block Application Process FBAP The part of the device software that executes the function blocks (PID, AO, transducer, or resource blocks).
Link Active Scheduler LAS
Macrocycle The least common multiple of all the loop times on a given link.
The detection of a block leaving a particular state and when it returns back to that state.
A software program that interacts with blocks, events and objects. One application may interface with other applications or contain more than one application.
A logical software unit that makes up one named copy of a block and the associated parameters its block type specifies. It can be a resource block, transducer block or a function block.
A step-in system design: selecting functional units, assigning their locations and identifiers, and defining their interconnections.
A physical entity capable of performing one or more specific functions. Examples include transmitters, actuators, control lers, operator interfaces.
An instantaneous occurrence that is significant to scheduling block execution and to the operational (event) view of the application.
Communications protocol for a digital, serial, two-way system that interconnects industrial field equipment such as sensors, actuators, and controllers.
An executable software object that performs a specific task, such as measurement or control, with inputs and outputs that connect to other entities in a standard way.
A device which is responsible for keeping a link operational. The LAS executes the link schedule, circulates tokens, distributes time messages and probes for new devices.
Manufacturer’s Signal Processing MSP A term used to describe signal processing in a device that is not defined by FF specifications.
Network Management NM A set of objects and services that provide management of a device’s communication system.
Network Management Agent
Network Management Information Base
Objects Entities, such as blocks, alert objects, trend objects, parameters, display lists, etc.
Object Dictionary OD
Parameters A value or variable which resides in block objects. Proportional Integral Derivative
Control System Management SM Provides services that coordinate the operation of various devices in a distributed fieldbus system.
System Management Agent SMA Part of the device software that operates on system manage ment objects. System Management Information
Base
Status
Virtual Communication Reference VCR
Virtual Field Device VFD
NMIB
PID A standard control algorithm. Also refers to a PID function block.
SMIB
Part of the device software that operates on network management objects.
NMA
A collection of objects and parameters comprising configura tion, performance and fault-related information for the communication system of a device.
Definitions and descriptions of network visible objects ofa device. Various object dictionaries are contained within a device. The dictionaries contain objects and their associated parameters which support the application in which they are contained.
A collection of objects and parameters comprising configura tion and operational information used for control of system management operations.
A coded value that qualifies dynamic variables (parameters) in function blocks. This value is usually passed along with the value from block to block. Fully defined in the FFFBAP specifications.
A defined communication end-point. Fieldbus commu nications can primarily only take place along active communications path that consists of two VCR end points. For example, to establish communications between a trans ducer AO block and another function block, a VCR must be defined at the transducer block and a VCR must be defined at the function block between the two function blocks.
A logical grouping of ‘user layer’ functions. Function blocks are grouped into a VFD, and system and network management are grouped into a VFD.
7
Page 8
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
References
Publications from the Fieldbus Foundation
Flowserve recommends that the user obtain these publications, which provide additional information on Fieldbus technology:
Publication Title Publication Number Publisher
Technical Overview ,FOUNDATION fieldbus FD-043
Wiring and Installation 31.25 kbit/s, Voltage Mode, Wire MediumApplication Guide AG-140
31.25 kbit/s Intrinsically Safe Systems Application Guide AG-163
Engineering Guidelines AG-181
Function Block Application Process parts1&2 FF-890,FF-891 Contained in the User Layer Specification FF-002
Fieldbus Specifications Various Documents
Available from the Fieldbus Foundation
Technical Assistance
If the user encounters a problem with the Logix 3400MD digital positioner, the configuration of the Logix 3400MD digital positioner should be checked to verify that all selections are consistent with the application. If the problem persists, call your local Flowserve representative or Flowserve Digital Products support listed in the contact information at www.valvesight.com.
Do not return a Logix 3400MD digital positioner without authorization from Flowserve Product Technical Assistance, or until an RGA (Return Goods Autho­rization) has been issued by Flowserve.
Fieldbus Device Version Checking
To assure the proper operation of the fieldbus device, always make sure the DDs loaded in the host configurator’s library are the correct ones for the hardware version. Several different hardware versions of your fieldbus devices can possibly reside on various segments at the same time. Fieldbus Foundation has provided a means to tell which version of DD is needed for a particular device in its resource block.
The resource block contains the following standard parameters:
• MANUFAC_ID-- This contains the manufacture’s Fieldbus FoundationÔregistration ID number. Make sure this number matches the device used.
• DEV_TYPE-- This is the Foundation registered device type to designate what kind of device it is. Make sure the device type is correct for the unit.
• DEV_REV-- This is the current revision of the device.
• DD_REV-- This is the required DD revision level for this device. Make sure the DD supports this revision level. An improper DD may
cause unexpected operation or inability to use certain features.
The DD files used with the host have names derived from DEV_REV and DD_REV as follows:
<DEV_REV><DD_REV>.ffo
<DEV_REV><DD_REV>.sym
Example: IF DEV_REV is 0x01 and DD_REV is 0x03, then the DD files would be 0103.ffo and 0103 sym.
In addition to these Fieldbus Foundation specified parameters, some manufactures may add additional device version information. The ex­ample below is of the resource block for a Flowserve Logix 3400MD digital positioner. The revision array is an optional resource parameter, but gives additional information about the internal firmware code versions. This array resides at the bottom of the parameter listing.
8
Page 9
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
• MANUFAC_ID: This should always equal Flowserve or 0x464c53 (4607059).
• DEV_TYPE: This will be 0x0203 (515). This indicates the device is a Logix 3400MD digital positioner.
• DEV_REV: This is the revision level of the device.
• DD_REV: This is the revision level of the DDs.
• REVSION_ARRAY: Contains four elements. These should be viewed in decimal.
• Element number 1 (closest to the top) Fieldbus main software version IE.(300 = 3.00)
• Element number 2 Fieldbus Softing Stack version number IE.(212 = 2.12).
• Element number 3 The Major software version
• Element number 4 The Minor software version.
9
Page 10
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
1 Logix 3400MD Digital Positioner Description
1.1 Introduction
This section is intended for users who have never worked with the Logix 3400MD digital positioner fieldbus positioner interface. It provides some general information to acquaint the user with the Logix 3400MD digital positioner.
CAUTION: Flowserve recommends NI-FBUS Configurator software that runs on a variety of Personal Computer (PC) platforms using Windows
™
NT
, Windows XP™ , Windows VISTA™ or Windows 7™. It is a bundled Windows software and PC-interface hardware solution that allows quick, error-free
configuration and diagnosis of Flowserve control products with FOUNDATION fieldbus communications. The NI-FBUS Configurator allows users to com­municate with the Logix 3400MD digital positioner from a remote location to:
• Configure the Logix 3400MD digital positioner by selecting and setting operating parameters.
• Access diagnostic information to identify configuration, communication, Logix 3400MD digital positioner or process problems.
• Calibrate Logix 3400MD digital positioner.
• Request and display Logix 3400MD digital positioner data.
• Configure the Fieldbus network.
1.2 Fieldbus Logix 3400MD Digital Positioner
About the Logix 3400MD Digital Positioner
The Logix 3400MD digital positioner includes FOUNDATION fieldbus electronics for operating in a Fieldbus network as an H1 device. It features standard fieldbus function blocks with manufacturer specific additions for enhanced operation. This Logix 3400MD digital positioner is a Link Master device, which
means it can function as the backup Link Active Scheduler in a fieldbus network.
In addition to providing the Fieldbus Interface the Logix 3400MD digital positioner can also perform loop control functions. In conjunction with other FOUN­DATION fieldbus compliant devices, its func tion block set allows the formation of an extensive set of basic control applications.
Figure 1.1 Fieldbus Positioner (Logix 3400MD Digital Positioner)
The Logix 3400MD digital positioner in conjunction with any valve will, in essence, form a Fieldbus valve. When configured in conjunction with an Honey­well ST3000 fieldbus transmitter (for example) a complete control loop can be configured. Figure 1.2 shows a block diagram of the Logix 3400MD digital positioner digital positioner operating with other instrument
10
Page 11
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Figure 1.2 Functional Block Diagram of Logix 3400MD Digital Positioner Operating with other Instruments
Theory of Operation
Linear Mode Characterization
XDAO
Soft Limits MPC
Control
Command
(CMD_USED)
ST3000 FF
AI
Deviation
+
Integration Summer
Inner Loop Offset
Position
Logix 3400MD DP
PID
Fieldbus
Control
Algorithm
P
(GAIN_UPPER)
max
(GAIN_LOWER)
P
min
G
mult
(GAIN_MULTI)
(IL_OFFSET)
AO
XD
Air Supply
Inner-Loop
Hall Sensor
Output
(HALL_SENSOR)
D/A Output Percentage
Valve
Sensor
Piezo Valve
Voltage
Inner Loop
Spool Control
Tubed ATO
Stem Position Sensor
Figure 1.3 Logix 3400MD Digital Positioner Block Diagram
NOTE: Variable names inFigure1.3 are reference names only and not accessible to the user. They are for reference use only.
The Logix 3400MD digital positioner receives power from the two-wire, fieldbus input signal. A digital signal, sent via fieldbus, is used as the command source. A value of 0 percent is always defined as the valve closed position and a value of 100 percent is always defined as the valve open position.
Next, the command value is passed through a characterization/limits algorithm block. The positioner no longer uses cams or other mechanical means to characterize the output of the positioner. This function is done in software, which allows for in-the-field customer adjustment. The positioner has two basic modes: linear and custom characterization. In linear mode, the command signal is passed straight through to the control algorithm in a 1:1 transfer. If custom characterization is enabled, the command source is mapped to a new output curve via a 21-point, user-defined curve. In addi­tion, two-user defined features, Soft Limits and MPC (Minimum Position Cutoff; in fieldbus terminology these are called FINAL_VALUE_CUTOFF_HI and FINAL_VALUE_CUTOFF_LO), may affect the final command signal. The actual command being used to position the stem is called FINAL_VALUE. The FINAL_VALUE is the actual positioning command after any characterization or user limits have been evaluated.
The Logix 3400MD digital positioner uses a two-stage, stem positioning algorithm. The two stages are comprised of an inner-loop, spool control and an outer-loop, stem position control. Referring again to Figure 1.3, a stem position sensor provides a measurement of the stem movement. The control command is compared against the stem position. If any deviation exists, the control algorithm sends a signal to the inner-loop control to move the spool, up or down, depending upon the deviation. The inner-loop then quickly adjusts the spool position. The actuator pressures change and the stem begins to move. The stem movement reduces the deviation between control command and stem position. This process continues until the deviation goes to zero. The control algorithm is both proportional and integral. This algorithm will be further explained later in the document.
A more detailed example to explain the control function follows. Assume the following configuration:
• Unit will receive its command from the FBAP
• Custom characterization is disabled (therefore characterization is linear)
11
Page 12
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
• Soft limits or MPC functions are disabled
• Valve has zero deviation with a present input command of 50 percent
• Actuator is tubed air-to-open
Given these conditions, 50 percent represents a command of 50 percent. Custom characterization is disabled so the command is passed 1:1 to the FINAL_VALUE. Since zero deviation exists, the stem position is also at 50 percent. With the stem at the desired position, the spool valve will be at a posi tion in which no air flow is allowed to either side of the actuator. This is commonly called the null or balanced spool position. Upon a change in the command from 50 percent to 75 percent the posi tioner sees this as a command of 75 percent. With linear characterization, the FINAL_VALUE becomes 75 percent. Deviation is the difference between control command and stem position: Deviation = 75 percent - 50 percent= +25 percent, where 50 percent is the present stem position. With positive deviation, the control algorithm sends a signal to move the spool up from its present position. As the spool moves up, the supply air is applied to the bottom of the actuator and air is exhausted from the top of the actuator. This new pressure differential causes the stem to start moving towards the desired position of 75 percent. As the stem moves, the deviation begins to decrease. The control algorithm begins to reduce the spool opening. This process continues until the deviation goes to zero. At this point, the spool will be back in its null or balanced position. Stem movement will stop. Desired stem position has now been achieved.
One important parameter should be discussed at this point: Inner loop offset or spool offset. Referring to Figure 1.3, a number called inner loop offset (SPOOL_OFFSET) is added to the output of the control algorithm. In order for the spool to remain in its null or balanced position, the control algorithm must output a non-zero spool command. This is the purpose of the inner loop offset. The value of this number is equivalent to the signal that must be sent to spool position control to bring it to a null position with zero stem deviation. This parameter is important for proper control and will be discussed further in the Control and Tuning section.
1.3 Fieldbus Overview
Understanding Fieldbus
Fieldbus is an all-digital, serial, two-way communication system which interconnects industrial ‘field’ equipment such as sensors, actuators, and controllers. Fieldbus is a Local Area Network (LAN) for field instruments with built-in capability to distribute the control application across the network. See Figure 1.4.
Control Room Device
(Operator Interface)
Fieldbus LAN
ST 3000 FF
Figure 1.4 Fieldbus Connecting Control Room and Field Devices
The Fieldbus Foundation has defined standards to which field devices and operator/control stations communicate with one another. The communications protocol is an open system to allow all field devices and control equipment which are built to the FOUNDATION fieldbus standard to be integrated into a control system, regardless of the device manufacturer. This inter operability of devices using fieldbus technology is becoming the industry standard for automation and distributed control systems.
Hardware Architecture
The physical architecture of fieldbus allows installation of fieldbus devices using a twisted-pair cable. Often, existing wiring from analog devices can be used to wire up digital fieldbus devices. Multiple field devices can be connected on one cable (a multi-drop link), rather than conventional point-to point wiring used for analog devices. See Wiring the Logix 3400MD Digital Positioner to a Fieldbus Network.
Logix 3400IQ
Digital Positioner
Fieldbus
Device
Fieldbus
Device
Software Architecture
Fieldbus software architecture provides for more control functions to be available in the micropro cessor-based field device. Since fieldbus is a digital com­munication system, more data is available to operators for process monitoring, trend analysis, report generation, and trouble analysis. Device software changes can be downloaded to field devices remotely from the operator station (or PC) in the control room.
12
Page 13
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Application
An application is software that contains function block data and operating parameters (objects) which help define the operation of a device such as, sensor data acquisition or control algorithm processing. Some devices may contain more than one application.
Function Blocks
Usually, a device has a set of functions it can perform. These functions are represented as function blocks within the device. See Figure 1.5. Function blocks are software that provide a general structure for specifying different device functions. Each function block is capable of performing a control func tion or algorithm. Device functions may include analog input, analog output, and Proportional Integral Derivative (PID) control. These blocks can be connected together to build a process loop. The action of these blocks can be changed by adjusting the block’s configuration and operating parameters.
Fieldbus Device
Device Application
Function Block
Block Parameters
Function Block
Block Parameters
Fieldbus LAN
Figure 1.5 Fieldbus Devices Contain Device Applications and Function
Function Block
Block Parameters
Function Block
Block Parameters
Logix 3400MD Digital Positioner Interface Application
The Logix 3400MD digital positioner contains the electronics interface compatible for connecting to a fieldbus network. Logix 3400MD digital positioner application is configured using a fieldbus configura tion software program. The NI-FBUS Configurator software allows the user to configure blocks, change operating parameters and create linkages between blocks that make up the Logix 3400MD digital positioner applica-
tion. The changes to the Logix 3400MD digital positioner application are then written to the device and initialized.
2 Installation Overview
2.1 Introduction
This section provides a list of components needed to install and operate the Logix 3400MD digital positioner. Also provided is a list of typical start-up tasks and places where the user can find detailed information about performing the tasks.
2.2 Installation Components
Components Needed for Installation
The Logix 3400MD digital positioner contains electronics that enable it to operate using the FOUNDATION fieldbus . This digital interface requires a number of components to provide control and data communications between field devices and the control room environment. Table 2.1 outlines the basic component parts needed to install and operate the Logix 3400MD digital positioner on a fieldbus network.
13
Page 14
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Table 2.1 Components Required for Logix 3400MD Digital Positioner Installation
Components Description
Logix3400MDDigitalPositioner Fieldbus positioner. Power supply Furnishes DC power to fieldbus devices.
Power conditioner
Fieldbus cable Twisted pair shielded wire used to interconnect fieldbus devices.
Fieldbus terminators
Fieldbus IS Barriers (For hazardous area installations)
Fieldbus wiring blocks
Acts as a filter to prevent the power supply from interfering with the fieldbus signaling. (May be part of a fieldbus power supply.)
A signal termination device used to prevent reflected signals (noise) from distorting fieldbus communications.
Intrinsic safety wire barriers are required for hazardous location installations.
Wiring blocks allowing easy connection of devices, cable, terminators, surge suppressors and other fieldbus network components.
Operator Interface
In the control room an operator station, a personal computer or host computer acts as the operator interface to the fieldbus network. Using supervisory control software applications, the field devices on a fieldbus network can be monitored and controlled at the operator interface. Figure 2.1 shows how these components go together to operate on a fieldbus network.
Operator Station or
Host Computer
T
= Terminator
PC
= Power Conditioner
Power
PC
Supply
T
Fieldbus Cable
Fieldbus Device
T
Figure 2.1 Fieldbus Network Components
2.3 Installation / Operation Tasks
Installation of the Logix 3400MD digital positioner is not difficult. The tasks for installing and operating the Logix 3400MD digital positioner are outlined in Table 2.2.
14
Page 15
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Table 2.2 Installation / Operation Task Summary
Task Procedure Refer to . . .
- Bench Check (optional) (Bench configuration) Section 3, Bench Configuration (Optional)
Pre-installation Considerations
1
Install Logix 3400MD digital positioner Mounting
2
• Wiring
3 Power Up Logix 3400MD digital positioner Section 5.4, Powering Up the Logix 3400MD Digital Positi oner
4
Establish Communications
• Initial checks Configure Logix 3400MD digital positioner
5
6 Operation Section 7, Operation. Also see supervisory control applica tion documentation.
Periodic Maintenance
-
• Calibration
- Troubleshooting (if problems arise) Section 11, Software Maintenance
- Replacement (if needed) Section 9, Calibration
Section 4, Pre-installation Considerations
Section 5, Logix 3400MD Digital Positioner Installation Refer to Logix 3400MD Digital Positioner IOM
Section 6.7, Establishing Communications
Section 6.8, Making Initial Checks
Section 6.9, Configuration Tasks. The user manual supplied with the fieldbus configuration application.
Section 9, Calibration Section 10, Troubleshooting
3 Bench Configuration (Optional)
3.1 Introduction
The bench configuration is an optional procedure for checking your device. This section provides a procedure for configuring the Logix 3400MD digital positioner. This allows the user to load configura tion information into the device before it is connected in a fieldbus network. This enables the user to perform a bench check and configuration of the device before installation. Calibration is also possible before the device is installed in the field.
Device Calibration
A stroke calibration should be performed upon installation of the valve. The actuator pressure calibration should be verified on all advanced and pro models (Logix 341X MD and 342X MDdigital positioner). Instructions for performing this calibration can be found in Section 10.
3.2 Bench Check
Configure Logix 3400MD Digital Positioner Before Installation
Using the NI-FBUS Configurator (or other fieldbus device configuration application), the user can perform an bench check of the Logix 3400MD digital posi­tioner before it is mounted and connected to the process hardware and the fieldbus network. By wiring the device to the fieldbus interface of a PC and using a fieldbus power supply to furnish power to the device, the user can read and write parameters in the Logix 3400MD digital positioner.
1. Connect fieldbus cable to junction block fieldbus interface card to the fieldbus network.
CAUTION: Observe polarity of fieldbus cable throughout the network.
2. Loosen end-cap lock and remove end-cap cover from terminal block end of positioner housing.
3. The Logix 3400MD is not polarity sensitive. Connect either wire to either terminal screw.
15
Page 16
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Figure 3.1 Connecting wiring device.
4. At the junction block, connect a fieldbus terminator in parallel with the device.
5. Connect a power supply , power conditioner (if needed) and a fieldbus terminator to the fieldbus cable.
!Note: Do not connect the shield at the device connect only at the marshalling cabinet.
6. Turn on PC.
7. Turn on power supply.
8. Start fieldbus configuration application on PC. 9. Establish communications.
Once communications have established between the Logix 3400MD digital positioner and the PC, the user can then query the Logix 3400MD digital positioner.
Assign Bus Address and Device Tag
Check the device ID of the Logix 3400MD digital positioner and assign a network node address to the device and assign tag names to the device.
Note that the Logix 3400MD digital positioner is shipped with default node addresses and tag names that appear at start-up. These can be changed to actual network addresses and tag names.
Typically the device tag and block tags are modified to be unique throughout the network.
Device Configuration
The user can view the various block parameters that make up the Logix 3400MD digital positioner configuration. Enter parameter values for your process application and write them to the device. Refer to the Logix 3400MD Digital Positioner Start-up Guide for supplemental help.
Note: it is recommended to set the device address to at least 20hex or above if using the LAS feature to avoid possible conflicts with the host system.
4 Pre-installation Considerations
4.1 Introduction
This section reviews several topics which should be considered before installing the Logix 3400MD digital positioner. If replacing an existing Logix 3400MD digital positioner, this section can be skipped.
16
Page 17
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
4.2 Considerations for Logix 3400MD Digital Positioner
Evaluate Conditions
The Logix 3400MD digital positioner is designed to operate in common indoor industrial environments as well as outdoors. To assure opti­mum performance, conditions at the mounting area should be evaluated relative to published device specifications and accepted installation practices for electronic positioners including, but not limited to the following:
• Environmental Conditions:
• Ambient Temperature
• Relative Humidity
• Potential Noise Sources:
• Radio Frequency Interference (RFI)
• Electromagnetic Interference (EMI)
• Vibration Sources:
• Pumps
• Motorized Valves
• Process Characteristics:
• Temperature
• Maximum Pressure Rating
Figure 4.1 Typical Mounting Area Considerations Prior to Installation
17
Page 18
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Temperature Limits
Table 4.1 lists the operating temperature limits for Logix 3400MD digital positioner.
Table 4.1 Operating Temperature Limits
Ambient Temperature
For Intrinsically Safe
Applications
°C °F °C °F °C °F
Logix 3400MD digital positioner -52 to 60 -61 to 140 -52 to 85 -40 to 131 -40 to 80 -40 to 176
Electronics Ratings for
Explosion-proof Ap-
plications
Mechnical Rating
Power Requirements
The Logix 3400MD digital positioner is a bus-powered (two-wire) device, meaning that it receives its power from the VDC on a fieldbus wiring segment. Certain guidelines and limitations exists regarding the wiring of fieldbus devices. See Section 5.4 for more information on wiring the device.
Table 4.2 lists the operating power requirements for the Logix 3400MD digital positioner.
Table 4.2 Logix 3400MD Power Requirements
Static Power
Minimum Maximum
10 VDC @ 23mA 32 VDC @ 23mA
Air Supply Requirements
The Logix 3400MD digital positioner requires an external air filter (preferably the Valtek coalescing air filter).
The air supply should conform to ISA Standard S7.3 (with a dew point at least 18 °F (10°C) below ambient temperature, particle size below one micron, and oil content not to exceed one part per million). For a model with advanced or pro diagnostics (Logix 341X or 342X digital positioner), the internal pressure sensors are rated for continuous operation up to 150 psig.
Minimum supply pressure for proper operation is 30 psig.
Use of a regulator is highly recommended as it aids in the use of the diagnostics feature.
5 Logix 3400MD Digital Positioner Installation
5.1 Introduction
This section provides information about the mechanical and electrical installation of the Logix 3400MD digital positioner. It includes procedures for mount­ing, piping and wiring the Logix 3400MD digital positioner for operation. Refer to Logix 3400MD Digital Positioner IOM in for detailed information.
5.2 Mounting Variations
The Logix 3400MD digital positioner can be mounted to a:
• Valtek control valve
• Other manufacturer’s control valve
NOTE: Figure 5.1 through Figure 5.4 show typical installations for comparison
18
Page 19
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Figure 5.1 Typical Linear Actuator-mounted Installation
Figure 5.2 Rotary Transfer Case Mounting
Figure 5.3 Rotary Valve with Four-bar Linkage
19
Page 20
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Figure 5.4 Logix 3400MD Digital Positioner Mounted to a Diaphragm Actuator
5.3 Wiring Logix 3400MD Digital Positioner
Wiring the Logix 3400MD Digital Positioner to a Fieldbus Network
The Logix 3400MD digital positioner is designed to operate in a two-wire fieldbus network. Although wiring the Logix 3400MD digital positioner to a fieldbus network is a simple procedure, a number of rules exist that should be followed when constructing and wiring a network. This section provides general guidelines that should be considered when wiring the Logix 3400MD digital positioner to a fieldbus network segment. A procedure is given in this section for properly wiring the Logix 3400MD digital positioner.
For Detailed Fieldbus Wiring Information
Refer to Fieldbus Foundation document AG-140, Wiring and Installation 31.25 kbit/s, Voltage Mode, Wire Medium Application Guide, for complete informa­tion on wiring fieldbus devices and building fieldbus networks.
Fieldbus Device Profile Type
The Logix 3400MD digital positioner is identified as either of the following fieldbus device profile types in Table 5.1, (as per Fieldbus document FF-816):
Table 5.1 FOUNDATION fie ld bu s P ro fil e Typ e s
Device Profile Type:
111 113
X X Uses standard-power signaling to communicate on a fieldbus network. X X Is a bus-powered device. (The Logix 3400MD digital positioner does not have an internal power supply and so it receives its DC power
X Is acceptable for intrinsically safe (I.S.) applications
X X FISCO
Characteristic
from the fieldbus.)
X Is acceptable for non I.S. applications
CAUTION: If the user is installing intrinsically safe field devices in hazardous areas, several points should be considered. See Intrin­sically Safe Applications section.
Logix 3400MD Digital Positioner Wire Connections
Fieldbus signal communications and DC power are supplied to the Logix 3400MD digital positioner using the same fieldbus twisted-pair cable.
20
Page 21
For reference purposes
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Inside the electronics housing of the Logix 3400MD digital positioner is the terminal block for connecting external wiring as shown in Figure
5.5. Table 5.2 explains the usage of the wiring terminals for fieldbus use.
Figure 5.5 Logix 3400MD Digital Positioner Terminal Block
Table 5.2 Logix 3400MD Digital Positioner Wiring Terminals
Wiring Terminal Use
Screw terminals Non-polarized Fieldbus cable connections
Internal Ground Connection
An internal ground terminal is available next to the terminal. (See Figure 5.5.) The terminal can be used to connect the Logix 3400MD digital positioner to earth ground.
External Ground Connections
While grounding the Logix 3400MD digital positioner is not necessary for proper operation, an external ground terminal on the outside of the electronics housing provides additional noise suppression as well as protection against lightning and static discharge damage. Note that grounding may be required to meet optional approval body certification.
Intrinsically Safe Applications
Fieldbus barriers should be installed per manufacturer’s instructions for Logix 3400MD digital positioners to be used in intrinsically safe ap­plications.
The Logix 3400MD digital positioner carries an intrinsically safe barrier rating of 125 mA. Currents up to 125 mA will not damage the device.
The number of field devices on a segment may be limited due to power limitations in hazardous area installations. Special fieldbus barriers and special terminators may be required. Also, the amount of cable may be limited due to its capacitance or inductance per unit length.
Detailed Intrinsically Safe Information
Refer to Fieldbus Foundation document AG-163, 31.25 kbit/s Intrinsically Safe Systems Application Guide, for detailed information on connect­ing fieldbus devices for intrinsically safe applications.
Logix 3400MD Digital Positioner Wiring Procedure
The following procedure shows the steps for connecting fieldbus cable to the Logix 3400MD digital positioner.
CAUTION: All wiring must comply with local codes, regulations, and ordinances.
1. Loosen end-cap lock and remove end-cap cover from terminal block end of positioner housing.
21
Page 22
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
2. Feed fieldbus cable through one of conduit entrances on either side of electronics housing. Plug whichever entrance not used.
CAUTION: The Logix 3400MD digital po siti oner acc epts up to 16 AWG (1.5 mm diameter) wire.
For reference purposes
Figure 5.6 Logix 3400MD Digital Positioner Terminal Block
3. Check ground on the fieldbus cable shield (Fieldbus Cable Shield Connection). Normal practice for grounding a fieldbus cable segment is
that the cable shield should be grounded in only one place, preferably a ground point at the power supply, intrinsically safe barrier or near the fieldbus interface.
4. Replace end-cap, and tighten end-cap lock.
5. Connect a flat-braided wire to the external ground screw of the Logix 3400MD digital positioner housing.
6. Using the shortest length possible, connect the other end of the braided wire to a suitable earth ground.
Lightning Protection
The Logix 3400MD digital positioner contains moderate protection against near lightning strikes. External lightning protection measures should be employed as needed.
Conduit Seal
Logix 3400MD digital positioners installed as explosion-proof in a Class I, Division 1, Group B Hazardous (Classified) Location in accordance with ANSI/ NFPA 70, the US National Electrical Code (NEC), require a ‘LISTED’ explosion-proof seal to be installed in the conduit, within 18 inches of the Logix 3400MD digital positioner.
Crouse-Hinds
Logix 3400MD digital positioners installed as explosion-proof in a Class I, Division 1, Group B, C or D Hazardous (Classified) Locations do not require an explosion-proof seal to be installed in the conduit.
It is recommended that all seals installed on the Logix 3400MD positioner provide an environmental seal to keep moisture from entering into User Interface chamber of the positioner.
NOTE: Installation should conform to all national and local electrical code requirements.
CAUTION: Do not install in a Hazardous Location without following industry guidelines.
®
type EYS/EYD or EYSX/EYDX are examples of ‘LISTED’ explosionproof seals that meet this requirement.
Electrical Wiring Summary
Verify polarity when making field termination connection. The Logix 3400MD digital positioner is reverse polarity protected. With a fieldbus power supply connected, verify that an LED is blinking to determine if the electronics are running. Only one LED will blink at any given time. Refer to guidelines in FF AG-181 for proper wiring and segment checkout methods.
Electrical Wiring Frequently Asked Questions
Question: My DCS uses 24VDC, can I run a Logix 3400MD?
22
Page 23
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Answer: FF specifies a 10-32V operation range. A fieldbus compatible power supply with terminators should be used. NOTE: The Logix 3400MD is driven from a voltage source, not the typical 4-20 mA supply.
Question: I accidentally reversed the voltage supply across the Logix 3400MD digital positioner. How do I know if I damaged something?
Answer: The Logix 3400MD is non-polarized. Inadvertent connection of the fieldbus supply shouldn’t damage the unit.
Question: What is the input resistance of the Logix 3400MD digital positioner?
Answer: The Logix 3400MD digital positioner does not have a simple resistive input. This is because the Logix 3400MD digital positioner is an active device.
The fieldbus specifications dictate that the input impedance cannot be less than 3k ohms. This will vary according to frequency of the fieldbus communica­tions. Typical power requirements are 23 mA @ 10-32 VDC.
NOTE: The user cannot measure across the terminals of an un-powered Logix 3400MD digital positioner and get the effective resistance. It is an impedance device, not a resistive device.
5.4 Powering Up the Logix 3400MD Digital Positioner
Pre-power Checklist
• Before applying power to the fieldbus network the user should make the following checks:
• Verify that the Logix 3400MD digital positioner has been properly mounted and connected to a system.
• The Logix 3400MD digital positioner has been properly wired to a fieldbus network.
• The Logix 3400MD digital positioner housing has been properly connected to a suitable earth ground.
• The operator station or host computer has been installed and connected to the fieldbus network.
NOTE: If the user wants to enable the write-protect feature or change the operating mode of the Logix 3400MD digital positioner to simulation mode, the user must change hardware dip switches on the internal electronics boards. This may require that the power be removed from the Logix 3400MD digital positioner. See Section 6.5, Setting Write-protect Feature and Section 10.9, Simulation Mode for details.
Power Up Procedure
To apply power to the fieldbus network, perform the following steps:
1. Turn on all power supplies that furnish DC power to the fieldbus network.
2. Use a digital voltmeter and measure the DC voltage across the + and - Signal terminals to the Logix 3400MD digital positioner.
3. Verify that the terminal voltage is within the limits listed in Table 4.2, Logix 3400MD Digital Positioner Power Requirements.
6 Logix 3400MD Digital Positioner Configuration
6.1 Introduction
This section explains the tasks to establish communications and configure the Logix 3400MD digital positioner for the process application. An overview is given of the configuration tasks using the NI-FBUS Configurator application as an example. Detailed information on using the configurator application is found in the user manual supplied with the software.
Prior to installing the Logix 3400MD refer to sections 5, 6 and 7 in the Logix 3400MD IOM for informa tion on how to mount, install, wire and start up a Logix 3400MD.
23
Page 24
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
CAUTION Before proceeding with the tasks in this section the Logix 3400MD digital positioner must be installed and wired correctly. The user should be somewhat familiar with the fieldbus configuration.
If the Logix 3400MD digital positioner has not been installed and wired, or if the user is not familiar with device configuration, and/or does not know if the Logix 3400MD digital positioner is configured, please read the other sections of this manual before configuring the Logix 3400MD digital positioner.
6.2 Logix 3400MD Digital Positioner Communications
Communications and Control
All communications with the Logix 3400MD digital positioner is through an operator station or host computer running supervisory control and monitoring applications. These applications provide the operator interface to fieldbus devices and the fieldbus network.
Configuration Applications
CAUTION Configuration of the Logix 3400MD digital positioner for the process application is performed also through the operator interface (operator station or PC) running a fieldbus configuration software application. A number of applications are available for the user to configure fieldbus devices. The examples presented in this manual refer to the NI-FBUS Configurator application.
Software Compatibility
The NI-FBUS Configurator application version specified in Section 1.1 is fully compatible with all Valtek control products with FOUNDATION fieldbus com­munications option.
6.3 Logix 3400MD Digital Positioner Configuration Process
Logix 3400MD Digital Positioner Configuration
Configuration of the Logix 3400MD digital positioner (device) involves the following steps:
1. Establishing communication between the operator interface and the device (bringing the Logix 3400MD digital positioner on-line in a field-
bus network). See Section 6.7, Establishing Communications.
2. Making initial checks on the device serial number and firmware revision numbers. See Section 6.8, Making Initial Checks.
3. Using a fieldbus configuration application, creating or making changes to the device configura tion. See Section 6.9, Configuration Tasks.
4. Writing the device configuration changes to the device. See Section 6.9, Configuration Tasks. 5. Saving device configuration to disk. See
Section 6.9, Configuration Tasks.
6.4 Device Configuration
Function Block Application Process
All fieldbus devices contain one or more Function Block Application Processes (FBAP) as part of their device configuration. The FBAP in the Logix 3400MD digital positioner is a software application that defines the particular characteristics of the Logix 3400MD digital positioner. The FBAP comprises function blocks, a transducer block and a resource block, plus other functions which support these blocks. Each function block contains a set of operating param­eters (some of which can be user configured) that define the operating characteristics of the Logix 3400MD digital positioner.
Function blocks perform (or execute) their specific functions according to a schedule. This schedule provides the sequence and timing of events which occur within a device and also between other fieldbus devices. This schedule is coordinated with the function block execution schedules in the device and other fieldbus devices on the network. Additional information on the FBAP contained in the Logix 3400MD digital positioner is found in Section 8, Device Configuration.
24
Page 25
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Fieldbus Configuration Application
The Logix 3400MD digital positioner is configured using a fieldbus configuration application running on a operator station or host computer. The configuration tool allows the user to:
Connect function block inputs and outputs according to the process requirements.
• Make changes to function block parameters according to the process requirements
• Make changes to the schedule of function block execution.
• Write the FBAP changes to the device.
Mechanical Configuration Issues
Air Action: Air-to-open and Air-to-close are determined by the actuator tubing, not the software. When air action selection is made during configuration, the selection is telling the control which way the actuator is tubed. The tubing should be verified as correct prior to a stroke calibration. The top output port on the positioner is called port 1. It should be tubed to the increase open side of the actuator. That is, for an air-to-open actuator, port 1 should go to the bottom of the actuator.
The Logix 3400MD positioner has an electrical measurement range of 130°. That is, the electronics will sense stem position over a 130° range of travel of the follower arm. On a rotary valve, the typical rotation is 90°. When installing a Logix 3400MD positioner on a rotary valve, the 90° valve rotation must be centered within the 130° electrical range. If mechanical movement falls outside the electrical measurement range, the positioner can have a dead band at one end of travel in which valve move ment cannot be sensed.
Question: How do I know if the rotary linkage is centered within the 130° electrical range?
Answer: The slot in the take-off arm has enough clearance around the roller pin to move the follower arm slightly. Move the valve to the fully closed position.
At this position, move the follower arm within the slot clearance. If the valve does not respond to the movement; linkage adjustment is necessary. Repeat this test at the fully open position.
To adjust the stem position linkage, use the A/D feedback variable viewed using AD_RAW_FB param eter. Set TEST_MODE bit ‘Enable diagnostic Variable ac­cess.’ With the valve in its mechanical fail position (i.e. no pressure applied), slightly move the follower arm while watching the A/D feedback. If the number does not change, the arm is not centered in the electrical range. (The number will bounce one or two counts due to noise at a fixed position and should not be considered a change, it should move greater than 10 to 20 counts if the linkage is centered correctly). Rotate the take-off arm, if necessary, to bring the linkage in range. This procedure is only necessary on a rotary mounting. For Linear mountings, the red LED will blink if 65° travel is exceeded. Refer to the Calibration section for further information on stroke calibration errors.
Default Configuration
An FBAP containing default configuration parameters is resident in the firmware of the device and is loaded on power-up. By using the NI-FBUS Configurator (or other fieldbus configuration) application, the user can create or make changes to a FBAP for the device’s process application.
Device Configuration
Configuring the Logix 3400MD digital positioner results in:
• Function blocks that execute according to a user-defined schedule
• Measurements that are processed according to various user-configured parameters found within function blocks
• An output published on the fieldbus network according to a user-defined publishing schedule.
Device Configuration Example
A sample printout of a typical device configuration for the Logix 3400MD digital positioner is given in Appendix A, Sample Configuration Record.
25
Page 26
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
LAS Capability
The Logix 3400MD digital positioner is capable of operating as the Link Active Scheduler (LAS). The LAS is a fieldbus device which controls traffic on the network, such as controlling token-rotation and coordinating data publishing. This fieldbus function is active in only one device at any given time on a net-
work. Devices which can be designated as the LAS may be an operator station or a field device.
The Logix 3400MD digital positioner can be designated as a LAS so that, in the event of a failure of the primary LAS, control in the field could continue.
Please note that the Logix 3400MD digital positioner is not designed to be the primary LAS, and, therefore, the LAS capability in the positioner is regarded as a backup LAS. In some remote applica tions where there is no host computer continuously connected this device may be con­figured as the primary LAS.
The LAS may be disabled by defining the Logix 3400MD as a Basic device in the host system or performing a factory default reset. Factory default resets the positioner to a basic device
6.5 Setting Write-Protect Feature
Write-protect Feature
The Logix 3400MD digital positioner is available with a write protect feature. It consists of a dip switch located on the device’s electronics board that can be set to enable read only access (write-protect) to the device’s configuration. When the dip switch is in the “On” position and the corresponding device parameter is set, the device’s configuration parameters and calibration data can only be read or viewed, (device configuration is write protected).
ATTENTION: The dip switch is factory set for read- and write-access (not write-protected) “Off” position. (If the dip switch is in the “On” position, the positioner must be powered down before changing the dip switch.)
NOTE: The write protect dip switch is used in conjunction with the FEATURE_SEL parameter and is explained below.
Refer to the following steps to set the write protect dip switch.
1. Remove power to Logix 3400MD.
2. Loosen cap lock and unscrew the main housing cover of housing.
3.
ATTENTION: Using a ground strap or ionizer is highly recommended when handling the electronics module because electrostatic
discharges can damage certain circuit components.
4. Locate the dip switch on the main electronics boards in the housing.
5. Set write-protect dip switch to the appropriate position on the electronics board. See Figure 6.1 and Table 6.1.
6. Replace the cover and lock the locking screw
DIP Switch Block
Off
On
26
FF Write Protect Dip Switch
Figure 6.1 Write-protect DIP Switch Location on Main PCB Cover
Page 27
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Table 6.1 Write Protect dip Switch Settings
To Set the Dip Switch to:
Enable read and write access to the device’s configuration. (Factory-set default)
Enable read only access to device’s configuration. (Write-protect) On position on the dip switch.*
Off position on the dip switch.
Off
Off
On
On
Enabling Write Protect Feature
The write-protect feature is activated only when the HARD_W_LOCK option is set in the FEATURE_SEL parameter. Once the bit is set and W/R DIP switch is in R position, the device will remain write-protected until the device is powered down and the DIP switch is placed in the off position. See Table 6.2 for truth table.
Table 6.2 Write-protect Feature Truth Table
When the Write-protect dip switch main PCB cover is set to:
Off position Write-protect Disabled Write Protect Dis-
On position Write-protect Disabled Write Protect
... and the FEATURE_SEL HARD_W_LOCK option is set to: 0 (No) 1 (Yes)
abled
Enabled
6.6 Simulation Dip Switch
Simulation dip switch
A simulation parameter in the AO block is used to aid in system ‘debug’ if the process is not running. A hardware dip switch is provided to enable or disable the simulate parameter. See Section 10.8 for details on setting the simulation dip switch. (See Figure 10.1.)
6.7 Establishing Communications
Starting Communications
Once the Logix 3400MD digital positioner is connected to the fieldbus network and powered up, the user is ready to start communicating with the device.
The procedure in Table 6.3 outlines the steps to initiate communications with a Logix 3400MD digital positioner using the NI-FBUS Configura­tor.
Table 6.3 Starting Communications with Logix 3400MD Digital Positioner
Step Action
1. Check that the fieldbus is powered up.
2. Verify that the operator interface is loaded with the NI­FBUS Configurator or other configuration application.
3. View the active devices connected to the network.
4. Access the Logix 3400MD digital positioner’s blocks and parameters.
Tag Name Assignments
Verify that the power supply is on and connected with the proper polarity. See Table 4.2, Logix 3400MD Digital Positioner Power Requirements for proper voltage levels.
Start the application on the computer.
Start the NI-FBUS fieldbus driver and Configurator. NOTE: Network guidelines as out lined in AG­181 have been followed
Start the NI-FBUS Configurator application.
If device or block tags have not been assigned to a device, the NI-FBUS Configurator will automati cally assign a default device tag name. This is done so that the devices are visible on the network. The user can then change tag names according to the process requirements.
27
Page 28
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
6.8 Making Initial Checks
Identifying the Logix 3400 Digital Positioner
Before proceeding, verify the following to make sure that the user is communicating with the correct Logix 3400MD digital positioner:
• Device type = 0 x 0203
• Device ID = 464C530203-FLS-LX3400MD-00nnnnnnnn
• Device tag, (tag description of the Logix 3400MD digital positioner)
• Firmware revision level (revision level of the firmware elements)
Table 6.4 Logix 3400MD Digital Positioner Identification
Step View Parameter Verify
1 RS.DEV_TYPE The value is = 0x0203
2
DEVICE_REVISION DD_REVISION
The values are correct for the DD files provided.
3
Physical Device Tag NOTE: The device tag name is not contained in a parameter. It can be set and viewed using the field bus device configurator application.
The physical device tag is correct.
6.9 Configuration Tasks
Device Configuration Procedure Overview
A typical device configuration consists of the following tasks listed in Table 6.5 using the NI-FBUS Configurator application. Details on using the configurator application are found in the NI-FBUS Configurator user manual supplied with the application software.
This procedure assumes that the hardware installation of the Logix 3400MD digital positioner is complete and the Logix 3400MD digital positioner is powered up.
Table 6.5 Logix 3400MD Digital Positioner Configuration Task List
Task Procedure Result
1
2
3 Select a fieldbus device for configuration 4
5
6
Start the fieldbus process application
Start the fieldbus configurator application
Change the device and block tags, if desired.
Select/add/edit function blocks to create a function block application process. NOTE: Configure block objects in the following order:
1. Resource block
2. Transducer block
3. Analog Output block
4. PID block Connect (or wire) function blocks to define process loops.
Scans the fieldbus network and provides a listing of all active fieldbus devices on the network or selected link.
Configurator windows are displayed on screen listing the active fieldbus devices.
Any unassigned tags are given a default tag name by the configurator.
Shows a representation of function blocks in the graphical interface window.
Linkages between function block inputs and outputs are created by using wiring tools. Pre­configured templates can also be used.
7 8
9 Adjust the block execution schedule. The function block execution schedule changed according to the process requirements.
Change block parameters, if necessary. Configure trends and alarms
Parameters changed for the process requirements. Trending and alarms configured according to the process requirements.
28
Page 29
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
10 Write configuration to the fieldbus network.
11 Save the device configuration to disk.
The configuration changes are sent to the appropriate fieldbus devices on the network.
A copy of the device configuration file is saved on the hard disk of the computer or other disk.
7 Operation
7.1 Introduction
This section outlines the tasks for operating and monitoring the Logix 3400MD digital positioner on a fieldbus network. Refer to the Logix 3400MD Digital Positioner Start-up Guide, for additional information.
7.2 Operation Tasks
Fieldbus Device Operations
Positioning – For the most basic operation of the Logix 3400MD digital positioner the user must write the desired final position value to OUT in the AO block. The AO block MODE_BLK would be set to Manual. The AO block SHED_OPT must be set to anything but uninitialized and the CHANNEL is set to1. The Transducer block MODE_BLK is set to Auto. The Resource block MODE_BLK is set to Auto.
Note: A valid schedule must have been downloaded into the device for control from the AO block.
Calibration – Set the AO block and Resource block to OOS. Next set the Transducer block MODE_ BLK to Out-of-Service (OOS). Write the
desired calibration to CALIBRATE to perform the calibration routine. If performing the actuator pressure transducer calibration, the user will need to first write the supply pressure value into PRESSURE_SUPPLY_CAL_ REF and the correct pressure units (Same as PRESSURE_SUP­PLY_CAL REF units) into PRESSURE_UNITS. These are found under the XDTB_MAIN block. When calibrating a pro model positioner (342X model) enter the ACT_SIZE and ACT_AREA before starting the calibration routine.
8 Configuration Description
8.1 Introduction
This section provides information about the construction and contents of the Logix 3400MD digital positioner Function Block Application Process (FBAP) — the application that defines Logix 3400MD digital positioner function and operation in the process application.) This infor-
mation provides some understanding of the elements that make up the configuration of the device application.
For More Information on FBAP
The FBAP elements are described as they apply to the Logix 3400MD digital positioner in the following sections. More detailed information can be found in Fieldbus Foundation documents FF-890 and FF-891 Foundation Specification Function Block Application Process.
8.2 Function Block Application Process
Introduction
The FBAP comprises a set of elementary functions which are modeled as function blocks. Function blocks provide a general structure for defining different types of device functions (such as analog inputs, analog outputs and PID control). The FBAP also contains other objects that
provide other device functions, such as furnishing alarm information, historical data and links to other blocks for transferring data.
FBAP Elements
29
Page 30
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
The key elements of the FBAP are:
• Logix block objects and their parameters (and consist of the following block types)
• Resource block
• Transducer blocks
• PID Function block
• AO Function block
• DO Function block
• DI Function block
• IS Function block
• OS Function block
• Link Objects
• Alert Objects
• Trend Objects
• View Objects
• Domain Objects
Device Objects
Link objects allow the transfer of process data from one block to another. View, Alert and Trend objects handle function block parameters for operator interface of views, alarms and events, and historical data. A brief description of these objects is presented in the following sections.
8.3 Block Description
Block Objects
Blocks are elements that make up the FBAP. The blocks contain data (block objects and parameters) that define the application, such as the inputs and outputs, signal processing and connections to other applications. The Logix 3400MD digital positioner application contains the following block objects:
• Resource block
• Main Transducer block
• Tech Transducer block
• MD Transducer block
• Analog Output (AO) function block
• Digital Output (DO) function block
• Digital Input (DI) function block (DI_HI and DI_LO)
• Proportional Integral Derivative (PID) controller function block
• Input Selector (IS) function block
• Output Selector (OS) function block
Section 10.15 describes the funtion block execution times.
Table 8.1 briefly describes the operation of these blocks.
30
Page 31
Table 8.1 Function Block Application Process Elements
Resource
Block
PID Block
IN
OUT
BKCAL_IN
Resource
Communication Stack
Algorithm
AO Block
Scaling
CAS_IN
BKCAL_OUT
OUT
Transducer
Block
channel
Value
read/write
read/write
read/write
read/write
Subscribe
Logix
Positioner
Circuitry
Block Type Function
Resource
Main Transducer
Tech Transducer
MD Transducer
Analog Output (AO) function block
Digital Output (DO) function block
Digital Input (DI) function block
Input Selector (IS) function block
Output Splitter (OS) function block
PID Controller function block
Contains data which describes the hardware (physical) characteristics of the device. The resource block does not perform any action, but contains parameters that support application downloads. Transducer blocks Isolate the function blocks from I/O devices such as sensors, actuators, and switches. The transducer block interfaces with the hardware to produce an output. It also contains device-specific parameters, such as calibration and diagnostics parameters.
The main transducer block contains all of the parameters/data required for basic functionality of the device
The tech transducer block contains parameters/data that can be used to troubleshoot or analyze the device.
The MD transducer block contains parameters/data that are associated with the advanced or pro diagnostics of the device.
Performs basic automation functions that are integral to automated control and processing operations. The AO block performs functions like engineering units scaling, output scaling, alarming, and back calculation, when connected as a cascade to a PID or other block
The DO block converts the value in SP_D to something useful for the hardware found at the CHANNEL selection.
The DI block takes the manufacturer’s discrete input data, selected by channel number, and makes it available to other function blocks at its output. This block is intended to be used in a forward path only and is not intended to receive signals from the output of a controller. There is no back calculation support or propagation of control status values.
Performs standard or robust proportional integral derivative algorithm used in closed-loop processing.
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Figure 8.1 FBAP Block Diagram Example
Block Descriptions
Each block contains parameters that are standard Fieldbus Foundation-defined parameters. In other words, the parameters are pre-defined as part of the FF protocol for all fieldbus devices. Additionally, parameters exist which are defined by Flowserve and are specific to the Valtek Logix 3400MD digital positioner.
The following block descriptions list the predefined FF parameters included as part of the block as well as the Flowserve-defined parameters. A complete description for the FF parameters is provided in the Fieldbus Foundation document FF-891, Foundation Specification Function Block Application Process Part 2. The Flowserve parameter descriptions are included here as part of the block descriptions.
Block Parameter Column Descriptions
Tables on the following pages list all of the block parameters contained in each of the block objects. Table 8.2 explains the column headings for the parameter listings.
31
Page 32
Table 8.2 Block Parameter List Column Description
Column Name Description
Index
Origin
Name The mnemonic character designation for the parameter.
Data Type / Structure
Store
Default Value
A number that corresponds to the sequence of the parameter in the block parameter segment of the object dictionary. See Object Dictionary, Section 8.16.
STND – Standard Fieldbus Parameter defined in FF specifications MFG – Enhanced Parameter Manufacturer defined
Data type or structure for the parameter value:
1. Data types consist of simple variables or arrays and are:
• Unsigned8, Unsigned16 Unsigned32 - An unsigned variable of 8, 16 or 32 bits.
• Floating point - Floating point variable.
• Visible string - Visible string variable.
• Octet string - Octet string variable.
• Bit string - Bit string variable.
2. Data Structures consist of a record which may be:
• Value and Status - float - Value and status of a floating point parameter.
• Scaling - Static data used to scale floating point values for display purposes.
• Mode - Bit strings for target, actual, permitted and normal modes.
• Access permissions - Access control flags for access to block parameters.
• Alarm - float - Data that describes floating point alarms.
• Alarm - discrete - Data that describes discrete alarms.
• Event - update - Data that describes a static revision alarm.
• Alarm - summary - Data that summarizes 16 alerts.
• Simulate - Float - Simulate and transducer floating point value and status,and a simulate enable/disable
discrete.
• Test - Function block test read/write data. Indicates the type of memory where the parameter is stored:
S - Static — Writing to the parameter changes the static revision counter parameter ST_REV N - Non-volatile — Parameter must be retained during a power cycle. It is not under the static update code. D - Dynamic — The value is calculated by the block, or read from another block. R - Readable — The value is readable by the host. W - Writeable — The value is writeable by the host.
Default values for the block parameters. These are the values that are used when:
• the FBAP is initialized for the first time, or
• selecting restart with defaults of the resource block parameter RESTART.
• Performing a factory reset
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
8.4 Resource Block
Resource Block Function
The resource block contains data and parameters related to overall operation of the device and the FBAP. Parameters that describe the hard­ware specific characteristics of the device and support application download operations make up the resource block.
Resource Block Parameters Table 8.3 lists the FF and Flowserve-defined parameters and their default values contained in the resource block.
Table 8.3 Resource Block Parameters
Index Origin Name Store Date Type Default Value
0 STND RESOURCE_BLOCK_2 SRW Record BLOCK 0 1 STND ST_REV SR Simple UNSIGNED16 0 2 STND TAG_DESC SRW Simple OCTET_STRING “ “ 3 STND STRATEGY SRW Simple UNSIGNED16 0 4 STND ALERT_KEY SRW Simple UNSIGNED8 0 5 STND MODE_BLK SRW Record MODE 0x01;0x01;0x11;0x10 6 STND BLOCK_ERR R Simple BIT_STRING 0 7 STND RS_STATE R Simple UNSIGNED8 4 8 STND TEST_RW WR Record TEST 0 9 STND DD_RESOURCE SR Simple VISIBLE_STRING “ “
32
Page 33
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Index Origin Name Store Date Type Default Value
10 STND MANUFAC_ID SR Simple UNSIGNED32 RES_VAL_MANUFAC_ID 11 STND DEV_TYPE SR Simple UNSIGNED16 RES_VAL_DEV_TYPE 12 STND DEV_REV SR Simple UNSIGNED8 RES_VAL_DEV_REV 13 STND DD_REV SR Simple UNSIGNED8 RES_VAL_DD_REV 14 STND GRANT_DENY NRW Record ACCESS_PERM 0 15 STND HARD_TYPES SR Simple BIT_STRING RES_VAL_HARD_TYPES 16 STND RESTART RWB Simple UNSIGNED8 1 17 STND FEATURES SR Simple BIT_STRING RES_VAL_FEATURES 18 STND FEATURE_SEL SRW Simple BIT_STRING RES_FEATURE_SEL 19 STND CYCLE_TYPE SR Simple BIT_STRING 0x0001 20 STND CYCLE_SEL SRW Simple BIT_STRING 0x0000 21 STND MIN_CYCLE_T SR Simple UNSIGNED32 RES_VAL_MIN_CYCLE_T 22 STND MEMORY_SIZE SR Simple UNSIGNED16 0 23 STND NV_CYCLE_T SR Simple UNSIGNED32 0 24 STND FREE_SPACE R Simple FLOATING_POINT 0 25 STND FREE_TIME R Simple FLOATING_POINT 0 26 STND SHED_RCAS SRW Simple UNSIGNED32 640000 27 STND SHED_ROUT SRW Simple UNSIGNED32 640000 28 STND FAULT_STATE NR Simple UNSIGNED8 1 29 STND SET_FSTATE RW Simple UNSIGNED8 1 30 STND CLR_FSTATE RW Simple UNSIGNED8 1 31 STND MAX_NOTIFY SR Simple UNSIGNED8 RES_VAL_MAX_NOFITFY 32 STND LIM_NOTIFY SRW Simple UNSIGNED8 RES_VAL_MAX_NOFITFY 33 STND CONFIRM_TIME SRW Simple UNSIGNED32 640000 34 STND WRITE_LOCK SRW Simple UNSIGNED8 0 35 STND UPDATE_EVT RW Record ALARM_EVENT 0;0;0,0;0;0;9;0 36 STND BLOCK_ALM RW Record ALARM_DISC 0;0;0,0;0;0;0;8;0;0 37 STND ALARM_SUM|ALARM_SUM_RES2 SRW Record ALARM_SUMMARY 0;0;0;0 38 STND ACK_OPTION|ACK_OPTION_RES2 SRW Simple BIT_STRING 0 39 STND WRITE_PRI SRW Simple UNSIGNED8 0 40 STND WRITE_ALM RW Record ALARM_DISC 0;0;0,0;0;0;0;10;0;0 41 STND ITK_VER NR Simple UNSIGNED16 RES_VAL_ITK_VER 42 MFG DL_CMD1 RW Simple UNSIGNED8 0 43 MFG DL_CMD2 RW Simple UNSIGNED8 0 44 MFG DL_APPSTATE SR Simple UNSIGNED16 0 45 MFG DL_SIZE SR Simple UNSIGNED32 0 46 MFG DL_CHECKSUM SR Simple UNSIGNED16 0 47 MFG REVISION_ARRAY SR Array UNSIGNED16 0,0,0,0 48 MFG AUX_FEATURE RW Simple BIT_STRING 0 49 MFG RES_BLOCK_TEST R Array UNSIGNED8 0,0,0,0,0,0,0,0 50 MFG ERROR_DETAIL R Array UNSIGNED16 0,0,0
Resource Block Valtek Product-defined Parameter Descriptions
Table 8.4 describes the Valtek product-defined parameters in the resource block, which are specific to the Logix 3400MD.
Table 8.4 Resource Block Parameter Descriptions
Name Description or Parameter Contents
DL_CMD1 DL_CMD2
33
Page 34
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
DL_APPSTATE
DL_SIZE
DL_CHECKSUM
A read-only parameter that contains the application firmware revision level for: FB Board Software Revision: Byte 0-4 Future Growth
REVISION_ARRAY
RES_BLOCK_TEST
ERROR_DETAIL
Stack Revision Byte 5 FF Board NV Ram CRC LSB CMD Board Major Revision Byte 6 FF Board NV Ram CRC MSB CMD Board Minor Revision Byte 7 FF Board EF Results
An internal Valtek product test parameter.
An internal Valtek product parameter array, which contains details of BLOCK_ERR conditions.
8.5 Main Transducer Block
Transducer Block Function
The transducer block de-couples (or insulates) function blocks from local I/O devices, such as sensors or actuators. In the Logix 3400MD digital positioner, the transducer block takes the position from the analog output block and sends it, along with other parameters, to the po-
sitioner subsystem.
Transducer Block Parameters
Table 8.5 lists the FF and Valtek product-defined parameters and their default values in the transducer block. The main transducer block contains themost widely used parameters for general operation and ID.
Table 8.5 Main Transducer Block Parameters
Index Origin Name Store Date Type Default Value
0 STND XDTB_MAIN SRW Record BLOCK 0 1 STND ST_REV SR Simple UNSIGNED16 1 2 STND TAG_DESC SRW Simple OCTET_STRING “7 “ 3 STND STRATEGY SRW Simple UNSIGNED16 2 4 STND ALERT_KEY SRW Simple UNSIGNED8 4 5 STND MODE_BLK SRW Record MODE 0x01;0x01;0x11;0x10 6 STND BLOCK_ERR R Simple BIT_STRING 0 7 STND UPDATE_EVT RW Record ALARM_EVENT 0;0;0,0;0;0;0;0 8 STND BLOCK_ALM RW Record ALARM_DISC 0;0;0,0;0;0;0;0;0;0
9 STND TRANSDUCER_DIRECTORY NR Array UNSIGNED16 0 10 STND TRANSDUCER_TYPE NR Simple UNSIGNED16 106 11 STND XD_ERROR R Simple UNSIGNED8 0 12 STND COLLECTION_DIRECTORY NR Array UNSIGNED32 0 13 STND FINAL_VALUE NRW Record FLOAT_S 0x80;0.0 14 MFG WORKING_SP RW Simple FLOATING_POINT 0 15 MFG FINAL_POSITION_VALUE NR Record FLOAT_S 0x80,0.0 16 MFG CONTROLLER_STATE_STATUS R Simple BIT_STRING 0 17 MFG CONTROLLER_STATE_MASKING NRW Simple BIT_STRING 0 18 MFG POSITIONER_STATUS R Simple BIT_STRING 0 19 MFG POSITIONER_MASKING NRW Simple BIT_STRING 0 20 MFG DEVIATION_VALUE R Simple FLOATING_POINT 0 21 MFG PRESSURE_SUPPLY R Simple FLOATING_POINT 0 22 MFG PRESSURE_PORT_A R Simple FLOATING_POINT 0 23 MFG PRESSURE_PORT_B R Simple FLOATING_POINT 0 24 MFG TEST_MODE RW Simple BIT_STRING 0 25 MFG CALIBRATE RW Simple UNSIGNED8 0
34
Page 35
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
26 MFG CALIBRATION_STATUS R Simple BIT_STRING 0 27 MFG MAIN_RESERVED_1 NRW Simple FLOATING_POINT 0 28 MFG P_GAIN SRW Simple FLOATING_POINT 2 29 MFG I_GAIN SRW Simple INTEGER16 10 30 MFG D_GAIN SRW Simple UNSIGNED16 2 31 MFG PRESS_CTRL_GAIN SRW Simple FLOATING_POINT 0 32 MFG PRESS_CTRL_WINDOW SRW Simple FLOATING_POINT 0 33 MFG FINAL_VALUE_CUTOFF_HI SRW Simple FLOATING_POINT 100 34 MFG FINAL_VALUE_CUTOFF_LO SRW Simple FLOATING_POINT 0 35 MFG STOP_HI_POS SRW Simple FLOATING_POINT 110 36 MFG STOP_LO_POS SRW Simple FLOATING_POINT 10 37 MFG STROKE_TIME_OPEN_LIM NRW Record FLOAT_S 0x02,0.0 38 MFG STROKE_TIME_CLOSE_LIM NRW Record FLOAT_S 0x02,0.0 39 MFG MAIN_RESERVED_2 NRW Simple FLOATING_POINT 0 40 MFG PRESSURE_SUPPLY_CAL_REF NRW Simple FLOATING_POINT 0 41 MFG CYCLE_CNTR NRW Simple UNSIGNED32 0 42 MFG CYCLE_CNTR_LIM SRW Simple UNSIGNED32 4294967294 43 MFG CYCLE_CNTR_DEADBAND SRW Simple FLOATING_POINT 20 44 MFG TRAVEL_ACCUM NRW Simple UNSIGNED32 0 45 MFG TRAVEL_ACCUM_LIM SRW Simple UNSIGNED32 0 46 MFG TRAVEL_ACCUM_DEADBAND SRW Simple FLOATING_POINT 20 47 MFG STROKE_LENGTH SRW Simple FLOATING_POINT 0 48 MFG POS_ALERT_HI SRW Simple FLOATING_POINT 110 49 MFG POS_ALERT_LO SRW Simple FLOATING_POINT 10 50 MFG POS_DEADBAND SRW Simple FLOATING_POINT 10 51 MFG POS_DEVIATION_TIME SRW Simple FLOATING_POINT 60 52 MFG INTERNAL_TEMP R Simple FLOATING_POINT 0 53 MFG HOURS_SINCE_LAST_POWERUP NRW Simple FLOATING_POINT 0 54 MFG HOURS_SINCE_LAST_RESET NRW Simple FLOATING_POINT 0 55 MFG HOURS_LIFE_TIME NRW Simple FLOATING_POINT 0 56 MFG SIG_START NRW Simple FLOATING_POINT 0 57 MFG SIG_STOP NRW Simple FLOATING_POINT 100 58 MFG SIG_RATE NRW Simple FLOATING_POINT 100 59 MFG SIG_HOLD NRW Simple FLOATING_POINT 10 60 MFG SIG_INDEX NRW Simple UNSIGNED16 0 61 MFG SIG_FLAGS NRW Simple BIT_STRING 0 62 MFG TRAVEL_ACCUM_UNITS SRW Simple UNSIGNED8 57 63 MFG PRESSURE_UNITS SRW Simple UNSIGNED8 0x06 64 MFG INTERNAL_TEMP_UNITS SRW Simple UNSIGNED8 0x21 65 MFG XD_FSTATE_OPT SRW Simple UNSIGNED8 0 66 MFG ELECTRONICS_SN NR Simple VISIBLE_STRING “00000000” 67 MFG SOFTWARE_VER_MAJOR NR Simple UNSIGNED16 0 68 MFG SOFTWARE_VER_MINOR NR Simple UNSIGNED16 0 69 MFG SOFTWARE_DATE_CODE SRW Simple VISIBLE_STRING “ “ 70 MFG VALVE_MAN_ID NRW Simple UNSIGNED8 99 71 MFG VALVE_MODEL_NUM NRW Simple VISIBLE_STRING “ “ 72 MFG VALVE_TYPE NRW Simple UNSIGNED8 99 73 MFG VALVE_SIZE NRW Simple UNSIGNED8 99 74 MFG VALVE_CLASS NRW Simple UNSIGNED8 99 75 MFG VALVE_ENDCON NRW Simple UNSIGNED8 99 76 MFG VALVE_BODYMAT NRW Simple UNSIGNED8 99 77 MFG VALVE_PACKTYPE NRW Simple UNSIGNED8 99
35
Page 36
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
78 MFG LEAK_CLASS NRW Simple UNSIGNED8 99 79 MFG VALVE_FLAGS NRW Simple UNSIGNED8 99 80 MFG VALVE_TRIMMAT NRW Simple UNSIGNED8 99 81 MFG VALVE_TRIMCHAR NRW Simple UNSIGNED8 99 82 MFG VALVE_TRIMTYPE NRW Simple UNSIGNED8 99 83 MFG VALVE_TRIMNO NRW Simple UNSIGNED8 99 84 MFG VALVE_SN NRW Simple VISIBLE_STRING “ “ 85 MFG STEM_DIAM NRW Simple FLOATING_POINT 0 86 MFG RATED_TRAV NRW Simple FLOATING_POINT 0 87 MFG INLET_PRESS NRW Simple FLOATING_POINT 0 88 MFG OUTLET_PRESS NRW Simple FLOATING_POINT 0 89 MFG ACT_MAN_ID NRW Simple UNSIGNED8 0 90 MFG ACT_FAIL_ACTION NRW Simple UNSIGNED8 0 91 MFG ACT_MODEL_NUM NRW Simple VISIBLE_STRING All “ “ 92 MFG ACT_SN NRW Simple VISIBLE_STRING All “ “ 93 MFG ACT_TYPE NRW Simple UNSIGNED8 99 94 MFG ACT_SIZE NRW Simple UNSIGNED8 105 95 MFG ACT_AREA NRW Simple FLOATING_POINT 23.8 96 MFG SPRING_TYPE NRW Simple UNSIGNED8 99 97 MFG PO_DATE NRW Simple VISIBLE_STRING “ “ 98 MFG INSTALL_DATE NRW Simple VISIBLE_STRING “ “ 99 MFG MFG_PHONE NRW Simple VISIBLE_STRING “ “
100 MFG PUR_ORDER_NUM NRW Simple VISIBLE_STRING “ “ 101 MFG FINAL_VALUE_RANGE SRW Record SCALE 100.0,0.0,0x53e,1 102 MFG XD_CAL_LOC SRW Simple VISIBLE_STRING “ “ 103 MFG XD_CAL_DATE SRW Simple VISIBLE_STRING “ “ 104 MFG XD_CAL_WHO SRW Simple VISIBLE_STRING “ “ 105 MFG MAIN_RESERVED_3 RW Simple FLOATING_POINT 0 106 MFG MAIN_RESERVED_4 RW Simple FLOATING_POINT 0 107 MFG CONTROL_CONFIG NRW Simple BIT_STRING 0 108 MFG MISC_CONFIG NRW Simple BIT_STRING 0 109 MFG MAIN_BLOCK_TEST R Array UNSIGNED8 0,0,0,0,0,0,0,0 110 MFG MAIN_RESERVED_5 RW Simple FLOATING_POINT 0 111 MFG EXEC_DELAY SRW Simple UNSIGNED16 0 112 MFG MAIN_RESERVED_6 RW Simple FLOATING_POINT 0 113 MFG BLINK_CODE R Simple UNSIGNED8 0
Access Type
NOTE: How the Fieldbus board accesses the respective Control board variable.
• Std - Standard Parameters. These values are constantly updated from the Control Board, except during the ‘Signature’ capture.
• Info - Device Information Parameters. These values are read only at start-up or when any of them are changed. The number -n is used to group parameters into manageable sizes.
• Diag - Advanced Diagnostic
• Parameters - These values are active only when the parameter ‘Enable diagnostic Variable Access’ is set in TEST_MODE.
Transducer Block Diagram
Figure 8.2 is a block diagram showing the basic components of the transducer block.
36
Page 37
Figure 8.2 Transducer Block Diagram
Transducer Block Valtek Product-defined Parameters
Table 8.6 describes the Logix parameters included in the transducer block.
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Controller Board
Table 8.6 Transducer Block Parameter Descriptions
Parameter Default Value Function
FINAL_VALUE_CUTOFF_HI 110% This will saturate the actuator in an open position if FINAL_VALUE becomes greater than the cutoff value.
FINAL_VALUE_CUTOFF_LO 1%
FINAL_POSITION_VALUE Dynamic Actual stem position in percent of stroke
FINAL_VALUE_RANGE 110%to-10%
TEST_MODE 0 Used to enable certain parameter outputs and diagnostic control.
CONTROL_CONFIG 0 Used to configure the positioner.
PGAIN 2 Proportional gain.
DGAIN 2 Derivative gain.
IGAIN 10 Integral gain.
SOFTSTOP_HIGH 110% Software upper stroke limit
SOFTSTOP_LOW -10% Software lower stroke limit PRESS_UNITS Psi Units pressure sensors reading are expressed in.
TEMP_UNITS DegF Units temperature is expressed in.
This will saturate the actuator in a close position if FINAL_VALUE becomes less than the cutoff value. This is the same as the Minimum Position Cutoff feature of the Logix1200 digital positioner. The new terminology matches FF terminology.
The high and low range limit values, the engineering units code and the number of digits to the right of the decimal point to be used to display the final value.
Parameter Definitions
The following list summarizes some of the key parameters within the Logix 3400MD digital positioner. For definitions of parameters not listed, use the help window in the DD view. The Logix positioner automatically stores changed parameters in non-volatile memory when a change is made.
FINAL_VALUE: This is the set-point or command received by the 3400MD.
FINAL_VALUE_CUTOFF_HI : If FINAL_VALUE is greater than FINAL_VALUE_CUTOFF_HI, the positioner will saturate the actuator in an open posi-
tion. A 1 percent hysteresis is added, so FINAL_ VALUE must be more than 1 percent smaller than FINAL_VALUE_CUTOFF_HI, before the positioner will allow the valve to start closing. This feature is disabled in SOFTSTOP_HIGH is less than or equal to 100 percent.
37
Page 38
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
FINAL_VALUE_CUTOFF_LO: If FINAL_VALUE is less than FINAL_VALUE_CUTOFF_LO the positioner will saturate the actuator in a closed posi­tion. There is a 1 percent hysteresis added, so FINAL_VALUE must be more than 1 percent of FINAL_VALUE_CUTOFF_LO, before the posi­tioner will allow the valve to start opening. This feature is disabled in SOFTSTOP_LOW is less than or equal to 0 percent.
FINAL_POSITION_VALUE: This is the valve’s stem position, as sensed by the positioner. This value is always reported in percent of stroke.
TEST_MODE: This parameter is used to enable the diagnostic parameters in the Transducer Tech Block for continuous update. Also, this can be used to
set the mode to allow write to the DAC directly to test the spool control.
CONTROL_CONFIG: These are flags used to set the configuration of the positioner.
• Local Panel disable allows the user to disable any button pushes or changes to be made at the device.
• Continuous Friction Mode Enable allows the user to enable or disable the continuous friction mode.
• Pressure Control Enabled allows the user to enable or disable the pressure control function.
• Pressure Sensor Board Present is set by the device indicating that a functioning pressure board has been installed into the device.
• Single Action Enabled allows the user to select between single acting and double acting.
PGAIN: The Logix 3400MD digital positioner uses a special gain algorithm. The proportional gain increases with a decrease in error. This allows for maxi­mum resolution and speed. GAIN_UPPER is the upper limit to proportional gain.
DGAIN: The Logix 3400MD digital positioner uses a special gain algorithm. The proportional gain increases with a decrease in error. This allows for maxi­mum resolution and speed. GAIN_ LOWER is the lower limit to proportional gain.
IGAIN: In addition to proportional gain the Logix uses integral as well. This in the integral gain setting. Typically this is set to 10.
CALIBRATE: This parameter initiates calibration. Two types of calibration are available Stroke, Pressure Sensors (advanced/pro models only).
To learn more about calibration refer to the Calibration section of this document.
STOP_HIGH_POS: Software imposed stroke limit. The positioner will not allow the valve to open beyond the value shown in this parameter.
STOP_LOW_POS: Software imposed stroke limit. The positioner will not allow the valve to close beyond the value shown in this parameter, normally psi.
CYCLE_CNTR This parameter counts the number of cycles that have occurred.
CYCLE_DEADBAND In order for a cycle to be counted it must be greater than the value in this field.
CYCLE_CNTR_LIM_CNTR If CYCLE_COUNTER exceeds this value, the LED lights will start to blink Green, Red, Green, Green and a warning will
be generated in TRAVEL_FLAGS.
TRAVEL_ACCUM: Total distance the valve stem has traveled.
TRAVEL_ACCUM_DEADBAND: Amount in percent of stroke the valve must move in order for the movement to be added to TRAVEL_ENG.
TRAVEL_ALERT:_LIM If TRAVEL_ENG exceeds this value, the LED lights will start to blink Green, Red, Green, Green and a warning will be gener-
ated in TRAVEL_FLAGS.
STROKE_LENGTH: Stoke length of valve. This value is used to calculate TRAVEL_ENG.
TRAVEL_UNITS Units of measure used to calculate TRAVEL_ENG.
PRESS_UNITS Units of measure that pressure sensor readings are expressed in.
TEMP_UNITS Units of measure that temperature is expressed in.
Note: The stroke limiting feature could be used to make a valve very responsive to small steps. By increasing the nominal gain values, and
limiting the stroke speed, small steps would be subject to very high gains. When active, the algorithm scales back large step sizes, thus limiting the undesired effects large gains normally demonstrate on large step sizes, such as overshoot.
38
Page 39
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Signatures See Section 10.13, Initiating a Valve Signature for more details on using the signature acquisition functions of the Logix 3400MD digital positioner.
Custom Characterization See Section 10.11, Stroke Characterization for more details on using the custom characterization features of the Logix 3400MD digital positioner.
8.6 Tech Transducer Block
The Tech Transducer block contains the parameters used by a technician to troubleshoot a positioner. Many of these parameters are not up­dated on a regular basis. In order to cause these parameters to update on a regular basis the TEST_MODE parameter in the Main Transducer block must have the diagnostics enabled.
Section 10.16 Lists the parameters that do not update unless TEST_MODE is selected.
Table 8.7 Tech Transducer Block Parameters
Index Origin Name Store Date Type Default Value
0STND XDTB_TECH SRW Record BLOCK 0 1STND ST_REV SR Simple UNSIGNED16 1 2STND TAG_DESC SRW Simple OCTET_STRING “7 “ 3STND STRATEGY SRW Simple UNSIGNED16 2 4STND ALERT_KEY SRW Simple UNSIGNED8 4 5STND MODE_BLK SRW Record MODE 0x01;0x01;0x11;0x10 6STND BLOCK_ERR R Simple BIT_STRING 0 7STND UPDATE_EVT RW Record ALARM_EVENT 0;0;0,0;0;0;0;0 8STND BLOCK_ALM RW Record ALARM_DISC 0;0;0,0;0;0;0;0;0;0
9STND TRANSDUCER_DIRECTORY NR Array UNSIGNED16 0 10STND TRANSDUCER_TYPE NR Simple UNSIGNED16 106 11STND XD_ERROR R Simple UNSIGNED8 0 12STND COLLECTION_DIRECTORY NR Array UNSIGNED32 0 13MFG ELECTRONIC_STATUS R Simple BIT_STRING 0 14MFG ELECTRONIC_MASKING NRW Simple BIT_STRING 0 15MFG INNERLOOP_STATUS R Simple BIT_STRING 0 16MFG INNERLOOP_MASKING NRW Simple BIT_STRING 0 17MFG OUTERLOOP_STATUS R Simple BIT_STRING 0 18MFG OUTERLOOP_MASKING NRW Simple BIT_STRING 0 19MFG CONFIGURATION_STATUS R Simple BIT_STRING 0 20MFG CONFIGURATION_MASKING NRW Simple BIT_STRING 0 21MFG PRESSURE_STATUS R Simple BIT_STRING 0 22MFG PRESSURE_MASKING NRW Simple BIT_STRING 0 23MFG DEVIATION_EFFORT R Simple FLOATING_POINT 0 24MFG PRESS_CTRL_EFFORT R Simple FLOATING_POINT 0 25MFG INTEGRAL_EFFORT R Simple FLOATING_POINT 0 26MFG SPOOL_OFFSET RW Simple FLOATING_POINT 0 27MFG SPOOL_COMMAND RW Simple FLOATING_POINT 0 28MFG BACKOFF_EFFORT R Simple FLOATING_POINT 0 29MFG SPOOL_POSITION R Simple FLOATING_POINT 0 30MFG SPOOL_EFFORT R Simple FLOATING_POINT 0 31MFG PIEZO_OFFSET R Simple FLOATING_POINT 0 32MFG PIEZO_COMMAND R Simple FLOATING_POINT 0 33MFG USER_INTERFACE_INSTANT R Simple BIT_STRING 0 34MFG USER_INTERFACE_ACTIVE RW Simple BIT_STRING 0 35MFG P_GAIN_EFFECTIVE R Simple FLOATING_POINT 0 36MFG P_GAIN_MULT SRW Simple FLOATING_POINT 0.05
39
Page 40
40
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Index Origin Name Store Date Type Default Value
37MFG D_GAIN_EFFECTIVE R Simple UNSIGNED16 0 38MFG D_GAIN_FILTER SRW Simple UNSIGNED16 0 39MFG PRESS_CTRL_GAIN_EFFECTIVE R Simple FLOATING_POINT 0 40MFG PRESS_CTRL_GAIN_MULT SRW Simple FLOATING_POINT 0.05 41MFG PRESS_CTRL_SP SRW Simple FLOATING_POINT 0 42MFG FINAL_VALUE_CUTTOFF_HYSTERESIS SRW Simple FLOATING_POINT 0 43MFG CURVEX SRW Array FLOATING_POINT All 21 44MFG CURVEY SRW Array FLOATING_POINT All 21 45MFG STROKE_TIME_CAL R Simple FLOATING_POINT 0 46MFG STROKE_TIME_DOWN R Simple FLOATING_POINT 0 47MFG STROKE_TIME_UP R Simple FLOATING_POINT 0 48MFG HALL_DOWN SRW Simple UNSIGNED16 0 49MFG HALL_UP SRW Simple UNSIGNED16 0 50MFG HALL_RANGE SRW Simple UNSIGNED16 0 51MFG HALL_AD_COUNT R Simple UNSIGNED16 0 52MFG HALL_NULL SRW Simple UNSIGNED16 0 53MFG FB_ZERO SRW Simple UNSIGNED16 0 54MFG FB_OPEN SRW Simple UNSIGNED16 23505 55MFG FB_RANGE SRW Simple INTEGER32 0 56MFG FB_AD_COUNT R Simple UNSIGNED16 0 57MFG PORT_A_ZERO SRW Simple UNSIGNED16 0 58MFG PORT_A_FULL SRW Simple UNSIGNED16 1200 59MFG PORT_A_RANGE SRW Simple INTEGER16 1200 60MFG PORT_A_AD_COUNT R Simple UNSIGNED16 0 61MFG PORT_B_ZERO SRW Simple UNSIGNED16 0 62MFG PORT_B_FULL SRW Simple UNSIGNED16 1200 63MFG PORT_B_RANGE SRW Simple INTEGER16 1200 64MFG PORT_B_AD_COUNT R Simple UNSIGNED16 0 65MFG SUPPLY_PRESS_REF_PSI R Simple FLOATING_POINT 0 66MFG PIEZO_COUNTER R Simple UNSIGNED32 0 67MFG PIEZO_INTERVAL NRW Simple UNSIGNED16 0 68MFG HALL_TGT R Simple FLOATING_POINT 0 69MFG FB_VOLTS R Simple FLOATING_POINT 0 70MFG HALL_VOLTS R Simple FLOATING_POINT 0 71MFG PIEZO_VOLTS R Simple FLOATING_POINT 0 72MFG REF_VOLTS R Simple FLOATING_POINT 0 73MFG FB_POSITION_FILTER SRW Simple UNSIGNED16 0 74MFG LOAD_EE_DEFAULTS RW Simple UNSIGNED8 0 75MFG NVRAM_WRITE_CYCLES NR Simple UNSIGNED32 0 76MFG GENERIC_PARAMETER RW Record GENERIC_S 0;0;0 77MFG SPI_TEST_RCV R Array UNSIGNED8 All 0 78MFG SPI_TEST_TX R Array UNSIGNED8 All 0 79MFG TECH_BLOCK_TEST R Array UNSIGNED8 0,0,0,0,0,0,0,0 80MFG EXEC_DELAY SRW Simple UNSIGNED16 0 81MFG LX_SPI_STATUS_FLAGS NR Simple BIT_STRING 0 82MFG SUPPLY_PRESSURE_PCT R Simple FLOATING_POINT 0 83MFG PORT_A_PRESSURE_PCT R Simple FLOATING_POINT 0 84MFG PORT_B_PRESSURE_PCT R Simple FLOATING_POINT 0 85MFG TEMPERATURE_HIST R Array FLOATING_POINT All 0 86MFG ERROR_HIST R Array UNSIGNED8 All 0 87MFG CURVE_SELECT SRW Simple UNSIGNED8 0
Page 41
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Index Origin Name Store Date Type Default Value
88MFG SIG_DATA1 R Array INTEGER16 All 0 89MFG SIG_DATA2 R Array INTEGER16 All 0 90MFG SIG_DATA3 R Array INTEGER16 All 0 91MFG SIG_DATA4 R Array INTEGER16 All 0 92MFG SIG_DATA5 R Array INTEGER16 All 0 93MFG SIG_DATA6 R Array INTEGER16 All 0 94MFG SIG_DATA7 R Array INTEGER16 All 0 95MFG SIG_DATA8 R Array INTEGER16 All 0 96MFG SIG_DATA9 R Array INTEGER16 All 0 97MFG SIG_DATA10 R Array INTEGER16 All 0 98MFG SIG_DATA11 R Array INTEGER16 All 0 99MFG SIG_DATA12 R Array INTEGER16 All 0
100MFG SIG_DATA13 R Array INTEGER16 All 0 101MFG SIG_DATA14 R Array INTEGER16 All 0 102MFG SIG_DATA15 R Array INTEGER16 All 0 103MFG SIG_DATA16 R Array INTEGER16 All 0 104MFG SIG_DATA17 R Array INTEGER16 All 0 105MFG SIG_DATA18 R Array INTEGER16 All 0 106MFG SIG_DATA19 R Array INTEGER16 All 0 107MFG SIG_DATA20 R Array INTEGER16 All 0 108MFG SIG_DATA21 R Array INTEGER16 All 0 109MFG SIG_DATA22 R Array INTEGER16 All 0 110MFG SIG_DATA23 R Array INTEGER16 All 0 111MFG SIG_DATA24 R Array INTEGER16 All 0 112MFG SIG_DATA25 R Array INTEGER16 All 0 113MFG SIG_DATA26 R Array INTEGER16 All 0
Parameter Definitions
The Tech Transducer Block contains many of the parameters that are used by a technician. Make sure the TEST_MODE parameter in the Main Transducer Block has been set to enable diagnostic parameters when viewing the parameter in this block.
P_GAIN_MULT: The Logix 3400MD digital positioner uses a special gain algorithm. The proportional gain increases with a decrease in error. This allows for maximum resolution and speed. GAIN_MULT adjust the transition rate between GAIN_UPPER and GAIN_LOWER.
SPOOL_OFFSET: This parameter tells the positioner where the spool valve’s null position is. This value is set during a stroke calibration procedure and requires no further adjustment.
USER_INTERFACE_INSTANT: This parameter shows the instant value of the front panel DIP switches, button presses, and gain selector switch. These values are stored into the USER_INTERFACE_ACTIVE parameter during a Quick-Cal.
USER_INTERFACE_ACTIVE: This parameter is actually used by the system and allows the user to change the front panel settings without actu­ally changing the setting on the physical device. If these settings match the DIP switches then this parameter should not have to be changed. The settings that are changed through this parameter are as follows:
• Air Action ATO Enabled: allows the user to set the device to Air-to-Close or Air-to-Open.
• Characterization Linear: allows the user to select what characterization is requested. When this is set to “other” then the CURVE_SE­LECT parameter must be set.
• Autotune Enabled: allows the user to enable or disable the autotune feature.
• Low Friction Mode: allows the user to specify the device to operate in low or high friction mode.
41
Page 42
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
• Calibration Auto: allows the user to specify the auto calibration (default) or to enter into a job calibration mode.
LX_SPI_STATUS_FLAGS Should a loss of communications occur between the fieldbus card and positioner card this parameter sets the fail mode of the valve. Nothing selected will cause the positioner to hold the last known command should a loss of communications occurs.
STROKE_TIME_UP: Allows the user to limit the stroking speed of the positioner. Input the number of seconds for the desired opening stroke speed. Disable this feature by writing 0 to the variable.
STROKE_TIME_DN: Allows the user to limit the stroking speed of the positioner. Input the number of seconds for the desired closing stroke speed. Disable this feature by writing 0 to the variable.
CURVE_SELECT: This parameter allows the user to select what type of characterization curves the positioner will use. The selections are Equal Percent, Quick Open, or Custom. If Custom is selected, the parameters CURVEX and CURVEY must be initialized.
NVRAM_WRITE_CYCLES: This is a diagnostic parameter that allows the user to monitor the number of times the NVRAM is written to. This can be a useful diagnostic tool for checking if the host system is writing to the Fieldbus board memory too often. This is often a configura­tion error in the host system setup. Excessive write cycles can cause configuration upsets and possible communications slowdowns and errors. It also will shorten the operational life of a Fieldbus device by exceeding the finite number of write cycles NVRAM chips can be used reliably to. These devices typically have a minimum 10,000,000 write cycle endurance. Even though this is a very high number that would typically never be reached during the operational life of the device, a misbehaving host configura tion routing could drive up the number of write cycles very quickly, and should be corrected as all devices in the configuration will be adversely affected by this continuous download.
8.7 MD Transducer Block
The MD Transducer block contains the parameters used by the advanced and pro model of the Logix 3400MD. These parameters are used for diagnostics and error detection of the system.
Table 8.8 Transducer Block Parameters
Index Origin Name Store Date Type Default Value
0 STND XDTB_MD SRW Record BLOCK 0 1 STND ST_REV SR Simple UNSIGNED16 1 2 STND TAG_DESC SRW Simple OCTET_STRING “7 “ 3 STND STRATEGY SRW Simple UNSIGNED16 2 4 STND ALERT_KEY SRW Simple UNSIGNED8 4 5 STND MODE_BLK SRW Record MODE 0x01;0x01;0x11;0x10 6 STND BLOCK_ERR R Simple BIT_STRING 0 7 STND UPDATE_EVT RW Record ALARM_EVENT 0;0;0,0;0;0;0;0 8 STND BLOCK_ALM RW Record ALARM_DISC 0;0;0,0;0;0;0;0;0;0
9 STND TRANSDUCER_DIRECTORY NR Array UNSIGNED16 0 10 STND TRANSDUCER_TYPE NR Simple UNSIGNED16 106 11 STND XD_ERROR R Simple UNSIGNED8 0 12 STND COLLECTION_DIRECTORY NR Array UNSIGNED32 0 13 MFG LD_MD_MODE R Simple UNSIGNED8 0 14 MFG MECHANICAL_STATUS R Simple BIT_STRING 0 15 MFG MECHANICAL_MASKING NRW Simple BIT_STRING 0 16 MFG VALVE_TRAVEL_DISTANCE R Simple FLOATING_POINT 0 17 MFG VALVE_TRAVEL_HIGH_START RW Simple FLOATING_POINT 0 18 MFG VALVE_TRAVEL_HIGH_END RW Simple FLOATING_POINT 0 19 MFG VALVE_TRAVEL_PERCENT_YELLOW NR Simple FLOATING_POINT 0 20 MFG VALVE_CYCLE_COUNT R Simple UNSIGNED32 0 21 MFG VALVE_CYCLE_HIGH_START RW Simple UNSIGNED32 0 22 MFG VALVE_CYCLE_HIGH_END RW Simple UNSIGNED32 0 23 MFG VALVE_CYCLE_PERCENT_YELLOW NR Simple FLOATING_POINT 0 24 MFG PST_TIME_BREAKAWAY NR Simple FLOATING_POINT 0 25 MFG PST_PRESSURE_DIFF R Simple FLOATING_POINT 0
42
Page 43
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Index Origin Name Store Date Type Default Value
26 MFG PST_TIME_TO_TARGET NR Simple FLOATING_POINT 0 27 MFG PST_RESULT R Simple UNSIGNED8 0 28 MFG PST_TIMELIMIT RW Simple FLOATING_POINT 0 29 MFG ACTUATOR_RATIO RW Simple FLOATING_POINT 0 30 MFG ACTUATOR_RATIO_HIGH_START_LIMIT RW Simple FLOATING_POINT 0 31 MFG ACTUATOR_RATIO_HIGH_END_LIMIT RW Simple FLOATING_POINT 0 32 MFG ACTUATOR_RATIO_PERCENT_YELLOW NR Simple FLOATING_POINT 0 33 MFG SPOOL_CYCLE_HIGH_START_LIMIT RW Simple UNSIGNED32 0 34 MFG SPOOL_CYCLE_HIGH_END_LIMIT RW Simple UNSIGNED32 0 35 MFG SPOOL_CYCLES NR Simple UNSIGNED32 0 36 MFG CYCLE_TRAVEL_RESET RW Simple BIT_STRING 0 37 MFG SPOOL_CYCLE_PERCENT_YELLOW NR Simple FLOATING_POINT 0 38 MFG SPOOL_TRAVEL_HIGH_START_LIMIT RW Simple FLOATING_POINT 0 39 MFG SPOOL_TRAVEL_HIGH_END_LIMIT RW Simple FLOATING_POINT 0 40 MFG SPOOL_TRAVEL_PERCENT R Simple FLOATING_POINT 0 41 MFG SPOOL_TRAVEL_PERCENT_YELLOW NR Simple FLOATING_POINT 0 42 MFG TREND_STATE RW Simple UNSIGNED8 1 43 MFG TREND_INDEX RW Simple UNSIGNED8 0 44 MFG TREND_DATESTAMP R Array UNSIGNED8 0,0,0,0,0,0 45 MFG MD_RESERVED_1 RW Simple FLOATING_POINT 0 46 MFG MD_RESERVED_2 RW Simple FLOATING_POINT 0 47 MFG MD_RESERVED_3 RW Simple FLOATING_POINT 0 48 MFG MD_RESERVED_4 RW Simple FLOATING_POINT 0 49 MFG MD_RESERVED_5 RW Simple FLOATING_POINT 0 50 MFG SPOOL_RESPONSE_TIME NR Simple FLOATING_POINT 0 51 MFG SPOOL_START_LIMIT NRW Simple FLOATING_POINT 0 52 MFG SPOOL_END_LIMIT NRW Simple FLOATING_POINT 0 53 MFG SPOOL_PERCENT R Simple FLOATING_POINT 0 54 MFG PNEUMATIC_LEAK NR Simple FLOATING_POINT 0 55 MFG PNEUMATIC_LEAK_START NRW Simple FLOATING_POINT 0 56 MFG PNEUMATIC_LEAK_END NRW Simple FLOATING_POINT 0 57 MFG PNEUMATIC_LEAK_PERCENT_YELLOW NR Simple FLOATING_POINT 0 58 MFG FORCE_PRESSURE R Simple INTEGER16 0 59 MFG FORCE_SPRING R Simple INTEGER16 0 60 MFG FORCE_ACTUATOR R Simple INTEGER16 0 61 MFG DEVIATION_TIMES_EFFECTIVE_GAIN R Simple INTEGER16 0 62 MFG WORST_VALVE_HEALTH R Simple FLOATING_POINT 0 63 MFG WORST_ACTUATOR_HEALTH R Simple FLOATING_POINT 0 64 MFG WORST_POSITIONER_HEALTH R Simple FLOATING_POINT 0 65 MFG WORST_CONTROL_HEALTH R Simple FLOATING_POINT 0 66 MFG SUPPLY_PRESSURE_HIGH_START_LIMIT RW Simple FLOATING_POINT 0 67 MFG SUPPLY_PRESSURE_LOW_START_LIMIT RW Simple FLOATING_POINT 0 68 MFG SUPPLY_PRESSURE_LOW_END_LIMIT RW Simple FLOATING_POINT 0 69 MFG SUPPLY_PRESSURE_HIGH_PERCENT NR Simple FLOATING_POINT 0 70 MFG SUPPLY_PRESSURE_LOW_PERCENT NR Simple FLOATING_POINT 0 71 MFG FRICTION R Simple INTEGER16 0 72 MFG FRICTION_STARTING R Simple UNSIGNED16 0 73 MFG FRICTION_HIGH_START_LIMIT RW Simple UNSIGNED16 0 74 MFG FRICTION_HIGH_END_LIMIT RW Simple UNSIGNED16 0 75 MFG FRICTION_LOW_START_LIMIT RW Simple UNSIGNED16 0 76 MFG FRICTION_LOW_END_LIMIT RW Simple UNSIGNED16 0 77 MFG FRICTION_HIGH_PERCENT_YELLOW NR Simple FLOATING_POINT 0
43
Page 44
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Index Origin Name Store Date Type Default Value
78 MFG FRICTION_LOW_PERCENT_YELLOW NR Simple FLOATING_POINT 0 79 MFG PRESSURE_DIFFERENTIAL R Simple FLOATING_POINT 0 80 MFG MD_BLOCK_TEST R Array UNSIGNED8 0,0,0,0,0,0,0,0 81 MFG EXEC_DELAY SRW Simple UNSIGNED16 0 82 MFG FRICTION_UNITS RW Simple UNSIGNED8 0 83 MFG TREND_DATA_1 R Array INTEGER16 All 0 84 MFG TREND_DATA_2 R Array INTEGER16 All 0 85 MFG TREND_DATA_3 R Array INTEGER16 All 0 86 MFG TREND_DATA_4 R Array INTEGER16 All 0 87 MFG TREND_DATA_5 R Array INTEGER16 All 0 88 MFG TREND_DATA_6 R Array INTEGER16 All 0 89 MFG TREND_DATA_7 R Array INTEGER16 All 0 90 MFG TREND_DATA_8 R Array INTEGER16 All 0 91 MFG TREND_DATA_9 R Array INTEGER16 All 0
8.8 Analog Output Function Block
AO Block Description
The Analog Output function block serves as the external interface for the transducer function block. The value of SP is used to produce the OUT value which is then sent to the transducer block to specify the valve position. PV reflects the actual valve position reported by the transducer block.
The AO function block operates on the output value from a control block [such as PID] and performs the following primary functions (most can be user configured):
Set-point source selection limiting
• Units conversion
• Fault state action
• Position read back
• Alarming
• Mode control
• Output calculation
The database contains the standard AO block database, as defined in the FF FBAP specifications. Flowserve product extensions are specified in the Logix 3400MD digital positioner parameter dictionary and are described below.
The interface to the AO block contains the following:
• Execute function block
• Database read access
• Alarm acknowledgment
• Database write access
AO Block Connections
CAS_IN is the only linkable input parameter and is used with a PID function block for direct cascade connection. RCAS_IN is a contained input parameter used for remote cascade connection.
OUT and BKCAL_OUT are linkable output parameters. RCAS_OUT is a contained output parameter for remote cascade connection.
44
Page 45
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
The OUT parameter of the AO block is used to set the FINAL_POSITION_VALUE in the transducer block, as modified by the FINAL_VALUE_ RANGE.
READBACK_OUT tracks the valve position in percent.
Fail-safe Handling
The fail-safe parameters determine the response of an output block to the following conditions. FSTATE_TIME is the number of seconds without communication or with Initiate Fail Safe at the CAS_IN status, required to put this block into the fail safe state. The FAULT_STATE parameter of the resource block may also put this block into the fail safe state. The Failsafe Type I/O option determines whether the action is simply to hold, or to move to FSTATE_VAL.
The Target to Manual if IFS I/O option may be used to latch the fail safe state when IFS appears in the CAS_IN status. This will cause a fail-safe block alarm. After the cause of the IFS status is removed, the target mode may be returned manually to CAS mode when it is safe to do so Section 10.17 described how to setup the fail-safe handling.
AO Block Parameter List
Table 8.8 lists the block parameters and default values for the AO function block.
Table 8.9 AO Function Block Parameter List
Index Origin Name Store Date Type Default Value
0 STND ANALOG_OUTPUT_BLOCK SRW Record BLOCK 0 1 STND ST_REV SR Simple UNSIGNED16 0 2 STND TAG_DESC SRW Simple OCTET_STRING “ “ 3 STND STRATEGY SRW Simple UNSIGNED16 0 4 STND ALERT_KEY SRW Simple UNSIGNED8 0 5 STND MODE_BLK SRW Record MODE 0x01;0x01;0x79;0x10 6 STND BLOCK_ERR R Simple BIT_STRING 0 7 STND PV R Record FLOAT_S 0;0.0 8 STND SP NRW Record FLOAT_S AO_VAL_SP_STATUS;AO_VAL_SP_VALUE
9 STND OUT NRWO Record FLOAT_S 0x80;0.0 10 STND SIMULATE RW Record SIM_FLOAT 0;0.0;0;0.0;1 11 STND PV_SCALE SRW Record SCALE 100.0;0.0;0;0 12 STND XD_SCALE SRW Record SCALE 100.0;0.0;0;0 13 STND GRANT_DENY RW Record ACCESS_PERM 0;0 14 STND IO_OPTS|IO_OPTS_AO SRW Simple BIT_STRING 0 15 STND STATUS_OPTS|STATUS_OPTS_AO SRW Simple BIT_STRING 0 16 STND READBACK R Record FLOAT_S 0x80;0.0 17 STND CAS_IN NRWI Record FLOAT_S 0xC3;0.0 18 STND SP_RATE_DN SRW Simple FLOATING_POINT FLT_MAX 19 STND SP_RATE_UP SRW Simple FLOATING_POINT FLT_MAX 20 STND SP_HI_LIM SRW Simple FLOATING_POINT 100 21 STND SP_LO_LIM SRW Simple FLOATING_POINT 0 22 STND CHANNEL SRW Simple UNSIGNED16 1 23 STND FSTATE_TIME SRW Simple FLOATING_POINT 0 24 STND FSTATE_VAL SRW Simple FLOATING_POINT 0 25 STND BKCAL_OUT RO Record FLOAT_S 0xcc;0.0 26 STND RCAS_IN NRW Record FLOAT_S 0x1C;0.0 27 STND SHED_OPT SRW Simple UNSIGNED8 0 28 STND RCAS_OUT R Record FLOAT_S 0xcc;0.0 29 STND UPDATE_EVT RW Record ALARM_EVENT 0;0;0,0;0;0;9;0 30 STND BLOCK_ALM RW Record ALARM_DISC 0;0;0,0;0;0;0;8;0;0 31 MFG WSP RW Record FLOAT_S 0,0.0 32 MFG READBACK_OUT RO Record FLOAT_S 0x80;0.0 33 MFG AO_BLOCK_TEST R Array UNSIGNED8 0,0,0,0,0,0,0,0
45
Page 46
AO Block Diagram
Transducer Block 1
Transducer Block 2
OUT
Convert
PV SCALE
MODE Select
SP RATE UP
ACTUAL
TARGET
PERMITED
PV
CAS IN RCAS IN
Setpoint Limiting
SP RATE DN
SP HI LIM
SP LO LIM
SP
(Read)
XD SCALE
FaultState
Check
FSTATE TIME
FSTATE_VAL
BKCAL OUTRCAS OUT
SIMULATE:
TRANSDUCER SIMULATE ENABLE
READBACK
PV
Convert
U
SE PV
FOR BKCAL
BLOCK ALM
SHED OPT
UPDATE EVT
STATUS OPTS
AUTO
RCAS
F
ROMOUT
C
ONVERT
LO
AUTO
MAN
FaultState to Value
Rate
Limitin
g
Last SP
FSTATE
VALUE
MAN
LO
SP
(Write)
Setpoint Trackin
g
PV
TARGET
ACTUAL
WSP
Status
Calculation
Invert
Incr. to Close
fstate: Active
Time OUT
Timer
SHED RCAS
Targ to MAN on Bad IN
CHANNEL
Transducer Block n
SHED OPT
OUT
TOO
UT
P
ARAMETER
CAS
ACTUAL
ACTUAL
TARGET
ACTUAL
SP Track Ret. Tgt
i
SP PV Track LO IMAN
RCAS timeout
RCAS timeout
RCAS timeout
CAS
RCAS
IMAN
RS Feature_Sel Out_Readback On
READBACK_Out
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
AO Block Diagram
Figure 8.3 is a block diagram showing the key components of the AO function block.
46
Figure 8.3 AO Function Block Diagram
Clearing Block Configuration Errors
Block configuration errors prevent the block from leaving OOS mode. The parameter BLOCK_ERR will show whether a block configuration error is present. Table 10.7 is a list of parameters that can cause the status of CONFIGURATION ERROR to be set in the AO BLOCK_ERR parameter. NOTE: CONFIGURATION ERROR can only be cleared if the function block is being executed. One way of determining block execution is by per­forming a series two or three reads of the BLOCK_TEST parameter and confirming that the first byte of the parameter is incrementing. This will work if the execute rate is fast relative to the speed of reading BLOCK_TEST. A very slowly executing block may not appear to execute because block parameters are updated only when the block executes.
Mode-restricted Write Operations
Table 8.7 lists the AO block parameters which may be write restricted based upon the block’s mode. Listed in the table are the TARGET and/or ACTUAL modes required for the write to be accepted. Other limitations listed in the last column must also be met.
SIMULATE, READBACK and PV Determination
In the AO Function Block, these three parameters provide the values and status of the actuator position, where SIMULATE (or optionally OUT) generates the READBACK parameter and READBACK is then re-scaled to produce the PV.
The following sub-sections describe each of these parameters.
SIMULATE Parameter SIMULATE is the interface parameter between the AO and the Transducer Function Blocks. Each time the AO block ex­ecutes, SIMULATE.TRANSDUCER is updated with the FINAL_POSITION_VALUE from the transducer block.
When the SIMULATE.ENABLE is FALSE, SIMULATE.TRANSDUCER is copied into SIMULATE. SIMULATE. When SIMULATE.ENABLE is TRUE, SIMULATE.SIMULATE is not updated with SIMULATE.TRANSDUCER and the user may write a value and status to SIMULATE.SIMULATE.
Page 47
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
NOTE: SIMULATE.ENABLE can only be set TRUE when the Simulate dip switch is in the “On” position when the device is powered up or a pro­cessor restart is issued.
READBACK Parameter The value and status of READBACK will come from either the OUT parameter or SIMULATE.SIMULATE, determined by the state of the OUT_READBACK feature in the Resource Block. READBACK is in XD units.
When RS.FEATURE.OUT_READBACK is set TRUE, SIMULATE.SIMULATE is used for READBACK. When FEATURE.OUT_READBACK is FALSE, OUT will be used for READBACK.
NOTE: The default value for RS.FEATURE.OUT_READBACK is FALSE. With the Logix 3400MD, this feature should always be set TRUE to allow the transducer block position value to be the source of READBACK.
READBACK_OUT ALLOWS THE USER A LINKABLE PARAMETER FOR VALVE POSITION.
PV Parameter The PV value is simply the READBACK value, re-scaled from XD units to PV units. PV status is copied directly from READBACK
status.
8.9 Digital Output Function Block
DO Block Description
Operates according to Section 10.18
Table 8.10 DO Function Block Parameter List
Index Origin Name Store Date Type Default Value
0 STND DISCRETE_OUTPUT_BLOCK SRW Record BLOCK 0
1 STND ST_REV SR Simple UNSIGNED16 0
2 STND TAG_DESC SRW Simple OCTET_STRING “ “
3 STND STRATEGY SRW Simple UNSIGNED16 0
4 STND ALERT_KEY SRW Simple UNSIGNED8 0
5 STND MODE_BLK SRW Record MODE 0x01;0x01;0x79;0x30
6 STND BLOCK_ERR R Simple BIT_STRING 0
7 STND PV_D R Record DISC_S 0;0
8 STND SP_D NRW Record DISC_S DO_VAL_SP_D_STATUS;DO_VAL_SP_D_VALUE
9 STND OUT_D NRWO Record DISC_S 0x1C;0 10 STND SIMULATE_D RW Record SIM_DISC 0;0;0;0;1 11 STND PV_STATE SRW Simple UNSIGNED16 0 12 STND XD_STATE SRW Simple UNSIGNED16 0 13 STND GRANT_DENY RW Record ACCESS_PERM 0;0 14 STND IO_OPTS|IO_OPTS_DO SRW Simple BIT_STRING 0 15 STND STATUS_OPTS|STATUS_OPTS_DO SRW Simple BIT_STRING 0 16 STND READBACK_D R Record DISC_S 0;0 17 STND CAS_IN_D RWI Record DISC_S 0x1C;0 18 STND CHANNEL SRW Simple UNSIGNED16 0 19 STND FSTATE_TIME SRW Simple FLOATING_POINT 0 20 STND FSTATE_VAL_D SRW Simple UNSIGNED8 0 21 STND BKCAL_OUT_D RO Record DISC_S 0;0 22 STND RCAS_IN_D RW Record DISC_S 0x1C;0 23 STND SHED_OPT SRW Simple UNSIGNED8 0 24 STND RCAS_OUT_D R Record DISC_S 0;0 25 STND UPDATE_EVT RW Record ALARM_EVENT 0;0;0,0;0;0;9;0 26 STND BLOCK_ALM RW Record ALARM_DISC 0;0;0,0;0;0;0;8;0;0
Block
47
Page 48
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
The functionality of these parameters follows the standard Fieldbus definitions as defined in the Foundation Fieldbus specifications.
8.10 Digital Input Function Block
DI Block Description
The DI block takes the manufacturer’s input data, selected by channel number, and makes it available to other function blocks at its output. This block operates according to the Foundation Fieldbus specifications. Also found in Section 10.19
Table 8.11 DI Function Block Parameter List
Index Origin Name Store Date Type Default Value
0 STND DISCRETE_INPUT_BLOCK SRW Record BLOCK 0 1 STND ST_REV SR Simple UNSIGNED16 0 2 STND TAG_DESC SRW Simple OCTET_STRING “ “ 3 STND STRATEGY SRW Simple UNSIGNED16 0 4 STND ALERT_KEY SRW Simple UNSIGNED8 0 5 STND MODE_BLK SRW Record MODE 0x01;0x01;0x19;0x10 6 STND BLOCK_ERR R Simple BIT_STRING 0 7 STND PV_D R Record DISC_S 0;0 8 STND OUT_D NRWO Record DISC_S 0;0
9 STND SIMULATE_D RW Record SIM_DISC 0;0;0;0;1 10 STND XD_STATE SRW Simple UNSIGNED16 0 11 STND OUT_STATE SRW Simple UNSIGNED16 0 12 STND GRANT_DENY RW Record ACCESS_PERM 0;0 13 STND IO_OPTS|IO_OPTS_DI SRW Simple BIT_STRING 0 14 STND STATUS_OPTS|STATUS_OPTS_DI SRW Simple BIT_STRING 0 15 STND CHANNEL SRW Simple UNSIGNED16 0 16 STND PV_FTIME SRW Simple FLOATING_POINT 0 17 STND FIELD_VAL_D R Record DISC_S 0;0 18 STND UPDATE_EVT RW Record ALARM_EVENT 0;0;0,0;0;0;9;0 19 STND BLOCK_ALM RW Record ALARM_DISC 0;0;0,0;0;0;0;8;0;0 20 STND ALARM_SUM|ALARM_SUM_DI SRW Record ALARM_SUMMARY 0;0;0;0 21 STND ACK_OPTION|ACK_OPTION_DI SRW Simple BIT_STRING 0 22 STND DISC_PRI SRW Simple UNSIGNED8 0 23 STND DISC_LIM SRW Simple UNSIGNED8 0 24 STND DISC_ALM RW Record ALARM_DISC 0;0;0,0;0;0;0;7;0;0
Block
The functionality of these parameters follows the standard Fieldbus definitions as defined in the Foundation Fieldbus specifications.
8.11 Input Selector Function Block
IS Block Description
The signal selector block provides selection of up to four inputs and generates an output based on the configured action. This block normally receives its inputs from AI blocks. The block performs maximum, minimum, middle, average and ‘first good’ signal selection. With a combi­nation of parameter configuration options the block can function as a rotary position switch, or a validated priority selection based on the use of the first good parameter and the disable_n parameter. As a switch the block can receive switching information from either the connected inputs or from an operator input. The block also supports the concept of a middle selection. Although the normal configuration for this feature would be with three signals the block should generate an average of the middle two if four signals are configured or the average of two if three are configured and a bad status is passed to one of the inputs. Logic is provided for handling uncertain and bad signals in conjunction with configured actions. The intended application of this block is to provide control signal selection in the forward path only, therefore, no back calculation support is provided. SELECTED is a second output that indicates which input has been selected by the algorithm.
48
Page 49
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Table 8.12 IS Function Block Parameter List
Index Origin Name Store Date Type Default Value
0 STND INPUT_SELECTOR SRW Record BLOCK 0 1 STND ST_REV SR Simple UNSIGNED16 0 2 STND TAG_DESC SRW Simple OCTET_STRING “ “ 3 STND STRATEGY SRW Simple UNSIGNED16 0 4 STND ALERT_KEY SRW Simple UNSIGNED8 0 5 STND MODE_BLK SRW Record MODE 0x01;0x01;0x19;0x10 6 STND BLOCK_ERR R Simple BIT_STRING 0 7 STND OUT NRWO Record FLOAT_S 0x1C;0.0 8 STND OUT_RANGE SRW Record SCALE 100.0;0.0;0;0
9 STND GRANT_DENY RW Record ACCESS_PERM 0;0 10 STND STATUS_OPTS|STATUS_OPTS_IS SRW Simple BIT_STRING 0 11 STND IN_1 RWI Record FLOAT_S 0x08;0.0 12 STND IN_2 RWI Record FLOAT_S 0x08;0.0 13 STND IN_3 RWI Record FLOAT_S 0x08;0.0 14 STND IN_4 RWI Record FLOAT_S 0x08;0.0 15 STND DISABLE_1 RWI Record DISC_S 0x08;0 16 STND DISABLE_2 RWI Record DISC_S 0x08;0 17 STND DISABLE_3 RWI Record DISC_S 0x08;0 18 STND DISABLE_4 RWI Record DISC_S 0x08;0 19 STND SELECT_TYPE SRW Simple UNSIGNED8 0 20 STND MIN_GOOD SRW Simple UNSIGNED8 0 21 STND SELECTED RO Record DISC_S 0x1C;0 22 STND OP_SELECT RWI Record DISC_S 0x08;0 23 STND UPDATE_EVT RW Record ALARM_EVENT 0;0;0,0;0;0;9;0 24 STND BLOCK_ALM RW Record ALARM_DISC 0;0;0,0;0;0;0;8;0;0
The functionality of these parameters follows the standard Fieldbus definitions as defined in the Foundation Fieldbus specifications.
8.12 Output Splitter Function Block
OS Block Description
The output splitter block provides the capability to drive two control outputs from a single input. Each output is a linear function of some portion of the input. Back calculation support is provided using the same linear function in reverse. Cascade initialization is supported by a decision table for combinations of input and output conditions.
This block would normally be used in split ranging or sequencing of multiple valve applications. A typical split range application has both valves closed when the splitter input is 50%. One valve opens fully as the input drops to 0%. The other valve opens as the input rises above 50%. A typical sequencing application has both valves closed at 0% input. One valve opens fully as the input rises to 50%, and the other stays shut. The second valve opens as the input rises above 50%, and the first valve may remain open or shut off quickly. Because this block is in the control path, it is able to pass limit and cascade initialization information back to the upstream block.
Table 8.13 OS Function Block Parameter List
Index Origin Name Store Date Type Default Value
0 STND OUTPUT_SPLITTER SRW Record BLOCK 0
1 STND ST_REV SR Simple UNSIGNED16 0
2 STND TAG_DESC SRW Simple OCTET_STRING “ “
3 STND STRATEGY SRW Simple UNSIGNED16 0
4 STND ALERT_KEY SRW Simple UNSIGNED8 0
5 STND MODE_BLK SRW Record MODE 0x01;0x01;0x31;0x10
6 STND BLOCK_ERR R Simple BIT_STRING 0
7 STND SP RW Record FLOAT_S 0;0.0
49
Page 50
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Index Origin Name Store Date Type Default Value
8 STND OUT_1 RWO Record FLOAT_S 0x1C;0.0
9 STND OUT_2 RWO Record FLOAT_S 0x1C;0.0 10 STND OUT_1_RANGE SRW Record SCALE 100.0;0.0;0;0 11 STND OUT_2_RANGE SRW Record SCALE 100.0;0.0;0;0 12 STND GRANT_DENY RW Record ACCESS_PERM 0;0 13 STND STATUS_OPTS|STATUS_OPTS_OS SRW Simple BIT_STRING 0 14 STND CAS_IN RWI Record FLOAT_S 0x08;0.0 15 STND BKCAL_OUT RO Record FLOAT_S 0x1C;0.0 16 STND IN_ARRAY SRW Array FLOATING_POINT 0.0,50.0,51.0,100.0 17 STND OUT_ARRAY SRW Array FLOATING_POINT 0.0,50.0,51.0,100.0 18 STND LOCKVAL SRW Simple UNSIGNED8 0 19 STND BKCAL_IN_1 RWI Record FLOAT_S 0x08;0.0 20 STND BKCAL_IN_2 RWI Record FLOAT_S 0x08;0.0 21 STND BAL_TIME SRW Simple FLOATING_POINT 0 22 STND HYSTVAL SRW Simple FLOATING_POINT 0 23 STND UPDATE_EVT RW Record ALARM_EVENT 0;0;0,0;0;0;9;0 24 STND BLOCK_ALM RW Record ALARM_DISC 0;0;0,0;0;0;0;8;0;0
8.13 PID Function Block
PID Block Description
The PID function block provides a choice of selecting either a standard PID control equation (Ideal) or a robust PID.
Table 8.14 lists the block parameters and default values for the PID function block.
Table 8.14 PID Control Function Block Parameters
Index Origin Name Size Date Type Default Value
0 STND PID_BLOCK 62 Record BLOCK 0 1 STND ST_REV 2 Simple UNSIGNED16 0 2 STND TAG_DESC 32 Simple OCTET_STRING “ “ 3 STND STRATEGY 2 Simple UNSIGNED16 0 4 STND ALERT_KEY 1 Simple UNSIGNED8 0 5 STND MODE_BLK 4 Record MODE 0x01;0x01;0xF9;0x10 6 STND BLOCK_ERR 2 Simple BIT_STRING 0 7 STND PV 5 Record FLOAT_S 0x80;0.0 8 STND SP 5 Record FLOAT_S PID_VAL_SP_STATUS;PID_VAL_SP_VALUE
9 STND OUT 5 Record FLOAT_S 0x80;0.0 10 STND PV_SCALE 11 Record SCALE 100.0;0.0;0;0 11 STND OUT_SCALE 11 Record SCALE 100.0;0.0;0;0 12 STND GRANT_DENY 2 Record ACCESS_PERM 0,0
13 STND 14 STND STATUS_OPTS|STATUS_OPTS_PID 2 Simple BIT_STRING 0
15 STND IN 5 Record FLOAT_S 0x80;0.0 16 STND PV_FTIME 4 Simple FLOATING_POINT 0 17 STND BYPASS 1 Simple UNSIGNED8 0 18 STND CAS_IN 5 Record FLOAT_S 0x1C;0.0 19 STND SP_RATE_DN 4 Simple FLOATING_POINT FLT_MAX 20 STND SP_RATE_UP 4 Simple FLOATING_POINT FLT_MAX 21 STND SP_HI_LIM 4 Simple FLOATING_POINT 100 22 STND SP_LO_LIM 4 Simple FLOATING_POINT 0
CONTROL_OPTS|CONTROL_OPTS_ PID
2 Simple BIT_STRING 0
50
Page 51
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Index Origin Name Size Date Type Default Value
23 STND GAIN 4 Simple FLOATING_POINT 1 24 STND RESET 4 Simple FLOATING_POINT FLT_MAX 25 STND BAL_TIME 4 Simple FLOATING_POINT 0 26 STND RATE 4 Simple FLOATING_POINT 0 27 STND BKCAL_IN 5 Record FLOAT_S 0xCe;0.0 28 STND OUT_HI_LIM 4 Simple FLOATING_POINT 100 29 STND OUT_LO_LIM 4 Simple FLOATING_POINT 0 30 STND BKCAL_HYS 4 Simple FLOATING_POINT 0.5 31 STND BKCAL_OUT 5 Record FLOAT_S 0xcf;0.0 32 STND RCAS_IN 5 Record FLOAT_S 0xce;0.0 33 STND ROUT_IN 5 Record FLOAT_S 0xce;0.0 34 STND SHED_OPT 1 Simple UNSIGNED8 0 35 STND RCAS_OUT 5 Record FLOAT_S 0xcf;0.0 36 STND ROUT_OUT 5 Record FLOAT_S 0xcf;0.0 37 STND TRK_SCALE 11 Record SCALE 100.0;0.0;0;0 38 STND TRK_IN_D 2 Record DISC_S 0x1C;0 39 STND TRK_VAL 5 Record FLOAT_S 0x1C;0.0 40 STND FF_VAL 5 Record FLOAT_S 0x1C;0.0 41 STND FF_SCALE 11 Record SCALE 100.0;0.0;0;0 42 STND FF_GAIN 4 Simple FLOATING_POINT 1 43 STND UPDATE_EVT 16 Record ALARM_EVENT 0;0;0,0;0;0;0;0 44 STND BLOCK_ALM 18 Record ALARM_DISC 0;0;0,0;0;0;0;8;0;0
45 STND ALARM_SUM|ALARM_SUM_PID 8 Record 46 STND ACK_OPTION|ACK_OPTION_PID 2 Simple BIT_STRING 0
47 STND ALARM_HYS 4 Simple FLOATING_POINT 0.5 48 STND HI_HI_PRI 1 Simple UNSIGNED8 0 49 STND HI_HI_LIM 4 Simple FLOATING_POINT FLT_MAX 50 STND HI_PRI 1 Simple UNSIGNED8 0 51 STND HI_LIM 4 Simple FLOATING_POINT FLT_MAX 52 STND LO_PRI 1 Simple UNSIGNED8 0 53 STND LO_LIM 4 Simple FLOATING_POINT FLT_MAX 54 STND LO_LO_PRI 1 Simple UNSIGNED8 0 55 STND LO_LO_LIM 4 Simple FLOATING_POINT FLT_MAX 56 STND DV_HI_PRI 1 Simple UNSIGNED8 0 57 STND DV_HI_LIM 4 Simple FLOATING_POINT FLT_MAX 58 STND DV_LO_PRI 1 Simple UNSIGNED8 0 59 STND DV_LO_LIM 4 Simple FLOATING_POINT FLT_MAX 60 STND HI_HI_ALM 21 Record ALARM_FLOAT 0;0;0,0;0;0.0;0;4;0;0 61 STND HI_ALM 21 Record ALARM_FLOAT 0;0;0,0;0;0.0;0;2;0;0 62 STND LO_ALM 21 Record ALARM_FLOAT 0;0;0,0;0;0.0;0;1;0;0 63 STND LO_LO_ALM 21 Record ALARM_FLOAT 0;0;0,0;0;0.0;0;3;0;0 64 STND DV_HI_ALM 21 Record ALARM_FLOAT 0;0;0,0;0;0.0;0;6;0;0 65 STND DV_LO_ALM 21 Record ALARM_FLOAT 0;0;0,0;0;0.0;0;5;0;0 66 MFG PID_FORM 1 Simple UNSIGNED8 1 67 MFG ALGO_TYPE 1 Simple UNSIGNED8 1 68 MFG OUT_LAG 4 Simple FLOATING_POINT 0 69 MFG GAIN_NLIN 4 Simple FLOATING_POINT 1 70 MFG GAIN_COMP 4 Simple FLOATING_POINT 1 71 MFG ERROR_ABS 4 Simple FLOATING_POINT 0 72 MFG WSP 5 Record FLOAT_S 0xc0,0.0
ALARM_ SUMMARY
0;0;0;0
51
Page 52
Setpoint
SP_RATE_DN
SP_RATE_UP
SP HI LIM SP_LO_LM
SHED_OPT
Mode Select
BKCAL_OUT
GAIN
RESET
RATE
BAL_TIME
PID Control
CAS_IN
RCAS_IN
IN
RCAS_OUT
BKCAL_IN
Output
OUT_ HI_LIM OUT_LO_ LIM BAL_T IME
OUT
TRK_SCALE
Output Track
TRK_IN_D
TRK_VAL
SP
PV_FTIME
PV Filter
PV
BYPASS
Bypass
HI/LO DEV
Alarm
FF_SCALE
FF_GAIN
Feed Forward
ROUT_IN
ROUT_OUT
WSP
Backward
Path Outputs
Target & Permitted
Mode
Actual & Normal Mode
FF_VAL
PID_FORM
ALGO_TYPE
OUT_LAG
GAIN_NLIN
GAIN_COMP
ERROR_ABS
BKCAL_HYS
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Index Origin Name Size Date Type Default Value
73 MFG FUTURE1 4 Simple FLOATING_POINT 0 74 MFG PID_BLOCK_TEST 8 Array UNSIGNED8 0,0,0,0,0,0,0,0
Table 8.15 Flowserve PID Parameters
Parameter Name Description/Parameter Contents
Configuration parameter specifies the IDEAL or ROBUST PID equation to be used: IDEAL PID (default). Non-Interactive form of
PID_FORM
a three mode control equation that provides Proportional, Integral and Derivative (PID) control action. Linear and non-linear gain parameters are available. ROBUST PID. The same as Ideal PID. Additionally, the equation supports a user-config ured lag filter applied to calculated output value. (See OUT_LAG parameter.) Linear and non-linear gain parameters are available.
ALGO_TYPE
Derivative act on ERROR. Type B equation where Proportional and Integral act on ERROR and Derivative acts on PV. Type C equation where Integral acts on ERROR and Proportional and Derivative act on PV.
Configuration parameter specifies algorithm type which can be A, B, or C: Type A equation where Proportional, Integral and
OUT_LAG
Time constant of single exponential LAG filter applied to the OUT parameter (primary output). Units (in seconds). For ideal PID equation the lag filter is fixed at 1/16 and cannot be configured.
Dimensionless gain factor. When the gain factor is multiplied by absolute value of the error and added to the linear GAIN, the
GAIN_NLIN
result is a gain response which is proportional to the deviation. Default is zero, resulting in no response due to non-linear gain action.
GAIN_COMP The composite gain quantity including both linear and non-linear gain parameters. (Read-only parameter.)
Table 8.16 PID Parameters
Parameter Name Description/Parameter Contents
ERROR_ABS Absolute value of the difference between PV and working set-point. (Read only parameter.)
WSP
PID_BLOCK_TEST
Working set-point. This is the set-point value after absolute and rate limits have been applied. Deviation alarms are computed on this value. (Read only parameter.)
An internal test parameter.
PID Block Diagram
Figure 8.4 is a block diagram showing the key components of the PID control function block.
52
Figure 8.4 PID Control Block
Page 53
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
PID Block Description
PID control function block is an algorithm that produces an output signal in response to the measured variable and the set-point. The PID function block allows the user to choose either a standard PID control equation (Ideal) or a robust PID equation defined by Honeywell. This selection is defined in the PID_FORM parameter.
The output has three terms: Proportional, Integral and Derivative. The output is adjusted by tuning constants. Three tuning constants are contained in the ideal PID equation.
The robust PID uses four tuning constants.
1. GAIN is the tuning constant of the Proportional term.
2. RESET is the tuning constant of the Integral term.
3. RATE is the tuning constant of the Derivative term. RATE is usually modified by a lag, which is set at some fixed ratio higher than the rate
time to create a rate gain. No lag occurs with the rate in this implementation.
4. OUT_LAG is the fourth tuning constant used in the robust PID, it adds roll off to the output response. The action is similar to PID with rate gain.
PID Ideal and PID Robust
The ideal equation is a parallel or non-interacting implementation of PID control using three tuning constants. It automatically fixes OUT_LAG to 16 times the RATE time constant. This produces response characteristics equivalent to the algorithms used in TPS products.
The robust equation is the same parallel implementation of ideal PID control but allows the engineer to set the OUT_LAG and effectively change the rate gain.
ALGO_TYPE is a configuration parameter that contains one of three selected algorithm types, A, B, or C.
Where:
• A RATE, GAIN and RESET all act on the error between set point and measured variable.
• B RATE acts on the measured variable only, GAIN and RESET use the error.
• C RATE and GAIN act on the measured variable only, and RESET uses the error.
PID Tuning Parameters
Table 8.10 lists the valid ranges for the tuning parameters for the PID block. Note that OUT_LAG parameter cannot be configured when ideal PID is selected (PID_FORM = 1) and can be configured when robust PID is selected (PID_FORM = 2).
The values given for these tuning parameters are valid under the following conditions:
• The values assume that the minimum configured PID function block execution period (Ts) is 0.125 seconds.
• Algorithm type setting (i.e. A, B, or C) has no effect on the validation of these tuning parameters.
• The PID function block will reject all values outside the ranges.
Mode-restricted Writes to PID Parameters
Writing to certain PID block parameters are restricted by the block’s TARGET and/or ACTUAL mode. The MODE_BLK.TARGET or MODE_BLK. ACTUAL parameter must equal one of the modes in the ‘Write Restrictions Column’ in Table 8.8 before the user can write values to the pa­rameters listed.
Note: Do not select anything in CONTROL_OPTS in order to set the PID action to reverse acting.
53
Page 54
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
8.14 Link Objects
The function blocks configured to control a process are linked, or connected by objects within the devices. These links allow the user to trans­fer process and event data from one block to another. These links are defined through link objects.
Link Object Description
Link objects define Virtual Communication Relationships (VCRs), which are used to communicate between blocks. Link objects contain infor­mation needed to define communication links between function blocks and interface devices and other field devices. This information may be read by an interface device which will access information in field devices.
For example, link objects may be used to link the output parameter of one function block to the input of another block, or a trend object, or alert object.
Link objects are used for alarms and events, function block linking and trending. In the Logix 3400MD digital positioner links objects are available for:
• The PID block (6 input parameters)
• The PID and AO blocks (4 output parameters)
• Every alert object
• Every trend object
Link Object for Parameter or Number of Objects
Input parameters PID function block:
BKCAL_IN CAS_IN FF_VAL IN TRK_IN_D TRK_VAL
Output parameters AO function block: OUT
PID function block: BKCAL_OUT OUT
READBACK_OUT Alert objects 3 Trend objects 2 TOTAL 16 objects
8.15 View Objects
Description
View objects support management and control of function blocks by providing user visibility of function block configuration and operation. View objects al­low parameter data to be grouped and accessed (for viewing on an operator interface) by the user. This provides for information groups to be communicated efficiently. At least four view objects (View1, View2, View3 and View4.) are defined for each block in a device.
Block parameters can be grouped and displayed depending on how the data is to be used. Four standard view objects (groups) are defined for accessing the following types of information:
1. View1 - used to display dynamic operation data
2. View2 - used to display static operation data
3. View3 - used to display all dynamic data
4. View4 - used to display other static data.
54
Page 55
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Logix 3400MD Digital Positioner View Objects
In the Logix 3400MD digital positioner, four view objects have been defined for each of the blocks. All standard blocks follow the Fieldbus defined views found in the Foundation Fieldbus specification.
All nonstandard blocks are shown below in the following order:
• Resource block
• Transducer blocks
• AO block
• PID block
Note: Many of the transducer block parameters are not defined in the views since they are used only with the DTM, provided for technician access, or used only in advanced or pro mode.
Table 8.17 Resource Block View List
Index Name View1 View2 View3 View4
1 ST_REV 2 2 2 2
2 TAG_DESC
3 STRATEGY 2
4 ALERT_KEY 1
5 MODE_BLK 4 4
6 BLOCK_ERR 2 2
7 RS_STATE 1 1
8 TEST_RW
9 DD_RESOURCE
10 MANUFAC_ID 4
11 DEV_TYPE 2
12 DEV_REV 1
13 DD_REV 1
14 GRANT_DENY 2
15 HARD_TYPES 2
16 RESTART
17 FEATURES 2
18 FEATURE_SEL 2
19 CYCLE_TYPE 2
20 CYCLE_SEL 2
21 MIN_CYCLE_T 4
22 MEMORY_SIZE 2
23 NV_CYCLE_T 4
24 FREE_SPACE 4
25 FREE_TIME 4 4
26 SHED_RCAS 4
27 SHED_ROUT 4
28 FAULT_STATE 1 1
29 SET_FSTATE
30 CLR_FSTATE
55
Page 56
31 MAX_NOTIFY 1
32 LIM_NOTIFY 1
33 CONFIRM_TIME 4
34 WRITE_LOCK 1
35 UPDATE_EVT
36 BLOCK_ALM
37 ALARM_SUM 8 8
38 ACK_OPTION 2
39 WRITE_PRI 1
40 WRITE_ALM
41 DL_CMD1
42 DL_CMD2
43 DL_APPSTATE 2
44 DL_SIZE 4
45 DL_CHECKSUM 2
46
47 BLOCK_TEST 8
48 ERROR_DETAIL 6
Table 8.18 Transducer Block View List
Index Parameter Name Access Size V 1 V 2 V 3_1 V 3_2 V 4_1 V 4_2 V 4_3 V 4_4 No View
0 XDTB_MAIN SRW 62  1 ST_REV SR 2 2 2 2 2 2 2 2 2  2 TAG_DESC SRW 32 32 3 STRATEGY SRW 2 2  4 ALERT_KEY SRW 1 1  5 MODE_BLK SRW 4 4 4  6 BLOCK_ERR R 2 2 2  7 UPDATE_EVT RW 16 16 8 BLOCK_ALM RW 18 18
9 TRANSDUCER_DIRECTORY NR 2 2  10 TRANSDUCER_TYPE NR 2 2  11 XD_ERROR R 1 1  12 COLLECTION_DIRECTORY NR 4 4  13 FINAL_VALUE NRW 5 5 5  14 WORKING_SP RW 4 4 4  15 FINAL_POSITION_VALUE NR 5 5 5  16 CONTROLLER_STATE_STATUS R 1 1 1  17 CONTROLLER_STATE_MASKING NRW 1 1 1  18 POSITIONER_STATUS R 1 1 1  19 POSITIONER_MASKING NRW 1 1 1  20 DEVIATION_VALUE R 4 4  21 PRESSURE_SUPPLY R 4 4 4  22 PRESSURE_PORT_A R 4 4 4  23 PRESSURE_PORT_B R 4 4 4  24 TEST_MODE RW 1 1  25 CALIBRATE RW 1 1 1  26 CALIBRATION_STATUS R 1 1 1  27 MAIN_RESERVED_1 NRW 4 4
56
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Manufacturer Specific Parameters
REVISION_
ARRAY
Total 22 30 44 35
6
Page 57
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
28 P_GAIN SRW 4 4  29 I_GAIN SRW 2 2  30 D_GAIN SRW 2 2  31 PRESS_CTRL_GAIN SRW 4 4  32 PRESS_CTRL_WINDOW SRW 4 4  33 FINAL_VALUE_CUTOFF_HI SRW 4 4  34 FINAL_VALUE_CUTOFF_LO SRW 4 4  35 STOP_HI_POS SRW 4 4  36 STOP_LO_POS SRW 4 4  37 STROKE_TIME_OPEN_LIM NRW 5 5  38 STROKE_TIME_CLOSE_LIM NRW 5 5  39 MAIN_RESERVED_2 NRW 4 4 40 PRESSURE_SUPPLY_CAL_REF NRW 4 4  41 CYCLE_CNTR NRW 4 4 4  42 CYCLE_CNTR_LIM SRW 4 4  43 CYCLE_CNTR_DEADBAND SRW 4 4  44 TRAVEL_ACCUM NRW 4 4 4  45 TRAVEL_ACCUM_LIM SRW 4 4  46 TRAVEL_ACCUM_DEADBAND SRW 4 4  47 STROKE_LENGTH SRW 4 4  48 POS_ALERT_HI SRW 4 4  49 POS_ALERT_LO SRW 4 4  50 POS_DEADBAND SRW 4 4  51 POS_DEVIATION_TIME SRW 4 4  52 INTERNAL_TEMP R 4 4 4  53 HOURS_SINCE_LAST_POWERUP NRW 4 4  54 HOURS_SINCE_LAST_RESET NRW 4 4  55 HOURS_LIFE_TIME NRW 4 4  56 SIG_START NRW 4 4  57 SIG_STOP NRW 4 4  58 SIG_RATE NRW 4 4  59 SIG_HOLD NRW 4 4  60 SIG_INDEX NRW 2 2  61 SIG_FLAGS NRW 1 1  62 TRAVEL_ACCUM_UNITS SRW 1 1  63 PRESSURE_UNITS SRW 1 1  64 INTERNAL_TEMP_UNITS SRW 1 1  65 XD_FSTATE_OPT SRW 1 1  66 ELECTRONICS_SN NR 8 8  67 SOFTWARE_VER_MAJOR NR 2 2  68 SOFTWARE_VER_MINOR NR 2 2  69 SOFTWARE_DATE_CODE SRW 8 8  70 VALVE_MAN_ID SRW 1 1  71 VALVE_MODEL_NUM NRW 32 32  72 VALVE_TYPE NRW 1 1  73 VALVE_SIZE NRW 1 1  74 VALVE_CLASS NRW 1 1  75 VALVE_ENDCON NRW 1 1  76 VALVE_BODYMAT NRW 1 1  77 VALVE_PACKTYPE NRW 1 1  78 LEAK_CLASS NRW 1 1  79 VALVE_FLAGS NRW 1 1  80 VALVE_TRIMMAT NRW 1 1  81 VALVE_TRIMCHAR NRW 1 1  82 VALVE_TRIMTYPE NRW 1 1
57
Page 58
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
83 VALVE_TRIMNO NRW 1 1  84 VALVE_SN NRW 32 32  85 STEM_DIAM NRW 4 4  86 RATED_TRAV NRW 4 4  87 INLET_PRESS NRW 4 4  88 OUTLET_PRESS NRW 4 4  89 ACT_MAN_ID NRW 1 1  90 ACT_FAIL_ACTION NRW 1 1  91 ACT_MODEL_NUM NRW 32 32  92 ACT_SN NRW 32 32  93 ACT_TYPE NRW 1 1  94 ACT_SIZE NRW 1 1  95 ACT_AREA NRW 4 4  96 SPRING_TYPE NRW 1 1  97 PO_DATE NRW 8 8  98 INSTALL_DATE NRW 8 8  99 MFG_PHONE NRW 18 18
100 PUR_ORDER_NUM NRW 18 18  101 FINAL_VALUE_RANGE SRW 11 11  102 XD_CAL_LOC SRW 32 32  103 XD_CAL_DATE SRW 8 8  104 XD_CAL_WHO SRW 32 32  105 MAIN_RESERVED_3 RW 4 4 106 MAIN_RESERVED_4 RW 4 4 107 CONTROL_CONFIG NRW 1 1 1  108 MISC_CONFIG NRW 1 1 109 MAIN_BLOCK_TEST R 8 8 110 MAIN_RESERVED_5 RW 4 4 111 EXEC_DELAY SRW 2 2 112 MAIN_RESERVED_6 RW 4 4 113 BLINK_CODE R 1 1
Total Bytes 672 57 85 59 21 64 92 88 107 102
R Parameter is Readable
W Parameter is Writeable
N Parameter is stored in NV-RAM S Parameter is STATIC
Table 8.19 AO Block View Table
Index Name View1 View2 View3 View4
1 ST_REV 2 2 2 2 2 TAG_DESC 3 STRATEGY 2 4 ALERT_KEY 1 5 MODE_BLK 4 4 6 BLOCK_ERR 2 2 7 PV 5 5 8 SP 5 5
9 OUT 5 5 10 SIMULATE 11 PV_SCALE 11 12 XD_SCALE 11
58
Page 59
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
13 GRANT_DENY 2 14 IO_OPTS 2 15 STATUS_OPTS 2 16 READBACK 5 5 17 CAS_IN 5 5 18 SP_RATE_DN 4 19 SP_RATE_UP 4 20 SP_HI_LIM 4 21 SP_LO_LIM 4 22 CHANNEL 2 23 FSTATE_TIME 4 24 FSTATE_VAL 4 25 BKCAL_OUT 5 26 RCAS_IN 5 27 SHED_OPT 1 28 RCAS_OUT 5 29 UPDATE_EVT 30 BLOCK_ALM
ManufacturerSpecificParameters 31 WSP 5 5 32 BLOCK_TEST 8
Total 38 34 61 28
Table 8.20 PID Block View Table
Index Name View1 View2 View3 View4
1 ST_REV 2 2 2 2 2 TAG_DESC 3 STRATEGY 2 4 ALERT_KEY 1 5 MODE_BLK 4 4 6 BLOCK_ERR 2 2 7 PV 5 5 8 SP 5 5 9 OUT 5 5 10 PV_SCALE 11 11 OUT_SCALE 11 12 GRANT_DENY 2
13
14 STATUS_OPTS 2 15 IN 5 16 PV_FTIME 4 17 BYPASS 1 18 CAS_IN 5 5 19 SP_RATE_DN 4 20 SP_RATE_UP 4
CONTROL_ OPTS
2
59
Page 60
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
21 SP_HI_LIM 4 22 SP_LO_LIM 4 23 GAIN 4 24 RESET 4 25 BAL_TIME 4 26 RATE 4 27 BKCAL_IN 5 28 OUT_HI_LIM 4 29 OUT_LO_LIM 4 30 BKCAL_HYS 4 31 BKCAL_OUT 5 32 RCAS_IN 5 33 ROUT_IN 5 34 SHED_OPT 1 35 RCAS_OUT 5 36 ROUT_OUT 5 37 TRK_SCALE 11 38 TRK_IN_D 2 2 39 TRK_VAL 5 5 40 FF_VAL 5 41 FF_SCALE 11 42 FF_GAIN 4 43 UPDATE_EVT 44 BLOCK_ALM 45 ALARM_SUM 8 8 46 ACK_OPTION 2 47 ALARM_HYS 4 48 HI_HI_PRI 1
49 HI_HI_LIM 4
50 HI_PRI 1
51 HI_LIM 4
52 LO_PRI 1
53 LO_LIM 4
54 LO_LO_PRI 1
55 LO_LO_LIM 4
56 DV_HI_PRI 1
57 DV_HI_LIM 4
58 DV_LO_PRI 1
59 DV_LO_LIM 4
60 HI_HI_ALM
61 HI_ALM
62 LO_ALM
60
Page 61
63 LO_LO_ALM
64 DV_HI_ALM
65 DV_LO_ALM
Manufacturer Specific Parameters
66 PID_FORM 1
67 ALGO_TYPE 1
68 OUT_LAG 4
69 GAIN_NLIN 4
70 GAIN_COMP 4 4
71 ERROR_ABS 4 4
72 WSP 5 5
73 FUTURE1
74 BLOCK_TEST 8
Total 56 53 104 104
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
8.16 Alert Objects
Alert objects support the reporting of alarms and update events to operator interface devices and other field devices. Alert objects are used to communicate notification messages when alarms or events are detected. These objects are defined in the function block application.
Alert objects contain:
• The value of the data
• Block index (a number)
• Alert key (parameter)
• Time stamp
• Priority
Logix 3400MD Digital Positioner Alert Objects
Three alert objects are defined in the Logix 3400MD digital positioner for event and alarm reporting.
• 1 for events
• 1 for discrete alarms
• 1 for analog alarms
8.17 Alarm and Event Reporting
Fieldbus Alarms, Events and Alert Objects
Alarms are generated when a block leaves or returns from a particular state.
Events are instantaneous occurrences such as the change of a parameter.
Alarms and event messages are communicated to operator interfaces and other devices using alert objects.
61
Page 62
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Fieldbus Alarm Messages
Alarm messages are usually transparent to the user. A host system typically receives these messages and presents them to the user. Acknowl­edgment of alarms by the operator may be necessary to satisfy operation requirements.
Event Messages
• Event messages contain a time stamp
• Events also must be confirmed; otherwise the block will continually report the event.
• Acknowledgment of events may be necessary to satisfy operation requirements
Internal Positioner Alarms
NOTE: These are standard fieldbus alarms.
The Logix 3400MD digital positioner has several internal alarms which monitor electronics operation, the valve and actuator health and the mechanical linkage.
Refer to the following parameters to view positioner alarms:
• CONTROLLER_STATE_STATUS
• POSITIONER_STATUS
• MECHANICAL_STATUS
• ELECTRONIC_STATUS
• PRESSURE_STATUS
• INNERLOOP_STATUS
• OUTERLOOP_STATUS
• CONFIGURATION_STATUS
3400MD Status Alarms
Table 8.20 Status Alarms Table
62
Page 63
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Function Block
MAIN CONTROLLER_STATE_STATUS INITIALIZING
MAIN POSITIONER_STATUS POSITION_DEVIATION_ALARM
MD MECHANICAL_STATUS ACTUATOR_RATIO_WARNING
TECH ELECTRONIC_STATUS TEMPERATURE_HIGHT_WARNING
TECH PRESSURE_STATUS SUPPLY_PRESSURE_LOW_ALARM
TECH INTERLOOP_STATUS SPOOL_STICKING_WARNING
TECH OUTER_LOOP_STATUS FEEDBACK_RANGE_TOO_SMALL
TECH CONFIGURATION_STATUS PRESSURE_SENSOR_BOARD_PRESENT
Parameter 3400 Alert/Alarm
Items GREYED OUT are factor default
masked off (NOT ACTIVE)
FACTORY_RESET_STATE JOG_COMMAND_MODE SIGNATURE_IN_PROGRESS CONTINUOUS_FRICTION_MODE
SOFT_STOP_UPPER_LIMIT SOFT_STOP_LOWER_LIMIT POSITION_UPPER_LIMIT POSITION_LOWER_LIMIT MPC_ACTIVE LOCAL_INTERFACE_DISABLED ERROR_HISTOR_RESET
PNEUMATIC_INABILITY_TO_FAI_SAFE FRICTION_HIGH_WARNING FRICTION_LOW_WARNING FRICTION_HIGH_ALARM FRICTION_LOW_WARNING VALVE_CYCLES_WARNING VALVE_TRAVEL_WARNING
TEMPERATURE_LOW_WARNING SHUNT_VOLTAGE_REFERENCE_ERROR PIEZO_VOLTAGE_ERROR WATCH_DOG_TIME_OUT NV_RAM_CHECKSUM_ERROR LOSS_OF_INTER_PCB_COMM ELECTRONIC_INABILITY_TO_FAIL_SAFE
SUPPLY_PRESSURE_HIGH_WARNING SUPPLY_PRESSURE_LOW_WARNING PORT_1_VALUE_OUT_OF_RANGE PORT_2_VALUE_OUT_OF _RANGE PORT_1_RANGE_TOO_SMALL PORT_2_RANGE_TOO_SMALL PNEUMATIC_LEAK_WARNING
SPOOL_STICKING_ALARN SPOOL_CYCLES_WARNING SPOOL_TRAVEL_WARNING HALL_SENSOR_UPPER_POSITION HALL_SENSRO_LOWER_POSITION
POSITION_OUT_OF_RANGE_0 POSITION_OUT_OF_RANGE_100 NO_MOTION_TIME_OUT NON_SETTLE_TIME_OUT INNER_LOOP_OFFSET_TIME_OUT JOG_CALIBRATE_SET_100_POSITION
PRESSURE_CONTROL_LOCKED REVERSED_POT_ROTATION REVERSED_SPRING INSUFFICIENT_SPRING NO_SPRING
Defined Bits
0X01 0X02 0X10 0X20 0X40
0X01 0X02 0X04 0X08 0X10 0X20 0X40 0X80
0X01 0X02 0X04 0X08 0X10 0X20 0X40 0X80
0X01 0X02 0X04 0X08 0X10 0X20 0X40 0X80
0X01 0X02 0X04 0X08 0X10 0X20 0X40 0X80
0X01 0X02 0X04 0X08 0X10 0X20
0X01 0X02 0X04 0X08 0X10 0X20 0X40
0X01 0X04 0X08 0X10 0X20 0X40
XD_MAIN_ BLOCK_ERR
NONE MAINT_NOW NONE NONE NONE
MAINT_NOW NONE NONE NONE NONE NONE NONE NONE
MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON
MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON
MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON
MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON
MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON MAINT_SOON
NONE NONE NONE NONE NONE NONE
BLINK_ CODE
0 1 4 5 6
8
9 10 11 12 13 14 15
16 17 18 19 20 21 22 23
32 33 34 35 36 37 38 39
40 41 42 43 44 45 46 47
48 49 50 51 52 53
56 57 58 59 60 61 62
72 74 75 76 77 78
LED Blink
YGGR RGRR YGYY YGYY NONE
RRRR GYGY GYGY GYGG GYGG GGGY GGYG NONE
YYYY YRRR YRYG YRGY RRGR RRGY GRGG GRGG
YYGG YYGG RRRY RRYG RRRY RRRY RRRG YRRY
RYYG YYGR YYYG YYGY YYGY YYGY YYGY YRGR
YRGG RRGG GRGG GRGG RRYR RRYR
RGGY RGGY RGGY RGYY RGYG RGGR YGYR
NONE NONE NONE NONE NONE NONE
63
Page 64
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Pressure Alarms
Pressure alarms are only available on models with advanced diagnostics (Logix 3400MD digital positioner). Advanced diagnostic models add top and bottom pressure sensors. These sensor readings and alarms are only accessible from the communicator when the configuration has been set to Advanced.
Loss of Pressure: The loss of pressure alarm becomes active when the supply pressure is near the minimum positioner operating pressure of 30 psig. The LEDs will blink Red, Yellow, Yellow, Green. This alarm is meant to alert the user to low supply pressure as well as complete loss of pressure.
Top Sensor, Bottom Sensor: Each sensor is checked during actuator calibration. If a calibration reading appears to be out of range, the appropriate alarm will become active. The pressure sensors are located on the collector board assembly.
Internal Positioner Alerts
MPC: (FINAL_VALUE_CUTOFF_HI, FINAL_VALUE_CUTOFF_LO) The MPC or tight shutoff feature of the Logix 3400MD digital positioner allows the user to control the level at which the command signal causes full actuator saturation in the closed (or open) position. This feature can be used to guarantee actuator satura­tion in the closed (or open) position or prevent throttling around the seat at small command signal levels. To enable, use configuration to apply the desired MPC threshold. Note: The positioner automatically adds a 1 percent hysteresis value to the MPC setting to prevent jumping in and out of saturation when the command is close to the MPC setting.
Question: I set the FINAL_VALUE_CUTOFF_LO at 5 percent. How will the positioner operate?
Answer: Assume that the present command signal is at 50 percent. If the command signal is decreased, the positioner will follow the command until it
reaches 5 percent. At 5 percent, the spool will be driven in order to provide full actuator saturation. The positioner will maintain full satura tion below 5 percent command signal. Now, as the command increases, the positioner will remain saturated until the command reaches 6 percent (remember the 1 percent hysteresis value added by the positioner). At this point, the stem position will follow the command signal.
Question: I have FINAL_VALUE_CUTOFF_LO set to 3 percent but the valve will not go below 10 percent?
Answer: Is a lower soft limit enabled? The lower soft limit must be less than or equal to 0 percent in order for the MPC to become active. If soft stops are
active(SOFTSTOP_LOW>30, SOFTSTOP_ HIGH<100) FINAL_VALUE_HI or _LO is disabled.
Position Alerts
Position alerts notify the user that the valve has traveled past a configured limit. The default settings are –10 percent and 110 percent which are outside normal travel and, therefore, disabled. Position alerts only notify the user that a limit has been exceeded and do not limit stem movement. Position alerts will cause a green LED code to blink.
Soft Limits
Unlike position alerts, soft limits (SOFTSTOP_LOW, SOFTSTOP_HIGH) prevent the stem position from going below or above the configured limits. If the com­mand signal is trying to drive the position past one of the limits, the green LED code will blink, but the stem position will remain at the set limit.
Travel Accumulator
The travel accumulator is equivalent to a car odometer and sums the total valve movement. Using the user-defined stroke length and travel dead band, the Logix 3400MD digital positioner keeps a running total of valve movement. When the positioner first powers up, high and low dead band limits are calculated around the present position. When the stem position exceeds the travel dead band, the movement from the center of the dead band region to the new position is calculated and added to the travel accumulator. From this new position, dead band high and low limits are again calculated.
Example: The Logix 3400MD digital positioner has a default dead band configuration of 20 percent and the valve has a 4- inch linear stroke. When the valve first powers up, the command signal is 50 percent. The unit will calculate a high-travel threshold of 70 percent (50 percent present position plus 20 percent dead band) and a low-travel threshold of 30 percent (50 percent present position minus 20 percent dead band). As long as the stem position remains greater than 30 percent and less than 70 percent, no additions are made to the travel accumulator. Now, assume the stem position moves to 80 percent, which is
outside the present dead band. The Logix 3400MD digital positioner calculates the stem movement and adds this number to the travel accumulator.
80percent(presentposition)–50percent(previous)=30percentmovementx4-inchstroke=1.2 inches
64
Page 65
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
So, 1.2 inches is added to the travel accumulator. New dead band thresholds of 100 percent (80 percent present position plus 20 percent dead band) and 60 percent (80 percent present position minus 20 percent dead band) are calculated. This process continues as the stem position moves throughout its stroke range.
Cycle Counter
The cycle counter is another means of monitoring valve travel. Unlike the travel accumulator, the stem position must do two things to count as a cycle: exceed the cycle counter dead band and change direction. A cycle counter limit can also be written into the positioner. If this limit is exceeded, the LEDs will blink Green, Red, Green, Green.
Position Deviation
If the stem position differs fromthe control command by a certain amount for a given length of time, the LED‘s will blink Red, Red, Red, Red to signify excess deviation. The trip point and settling times are set in the transducer block.
8.18 Trend Objects
Trend objects support the management and control of function blocks by providing access to history information. Trend objects provide for short-term history data to be collected and stored within a resource. The collected data may be input and output parameters, and status infor­mation from selected function blocks. Trend objects are available anytime for reading.
A user will not typically view trend objects directly. A host system may receive the data and build displays using the history data.
The Logix 3400MD digital positioner has one defined trend object.
8.19 Domain Objects
Description Domain objects support download services which are used to download firmware to a device. Standard generic download services (defined by Fieldbus Foundation) are used in the domain object of the Logix 3400MD digital positioner.
8.20 Device Description
Device Descriptions and ODs
A Device Description (DD) provides a clear and structured text description of a field device. The descriptions found in a DD supplement the object dictionary definitions of device applications. So an OD description used in conjunction with the DD will provide a complete detailed description of the device operation.
(See the FF Fieldbus Specifications for more details about the usage of DDs and ODs.)
DD Download
The DD for the Logix 3400MD digital positioner can be downloaded by going to the Software Download section on the Flowserve website at www.flowserve.
com.
Device Description Contents
A typical DD contains information about the device parameters and operation, such as:
• Attributes, like coding, name, engineering unit, write protection, how-to-display, etc.
• The menu structure for listing parameters, including names of menus and sub-menus.
• The relationship of one parameter to others
• Information about help text and help procedures
• Maintenance, calibration and other necessary operation information.
65
Page 66
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
• Methods Wizard to help configure and commission the positioner
Standard and Device-specific DD
Standard DD descriptions for function blocks and transducer blocks are maintained by the Fieldbus Foundation. These descriptions can be used as part of a field device DD by manufacturers to describe the standard features of their devices. Device-specific descriptions are devel­oped by manufacturers to describe custom features which are unique to that particular device.
These two types of DDs (the standard and device-specific) can then be combined to provide a complete DD for the field device.
8.21 Object Dictionary
Object Dictionary Description
AP objects are described in the Object Dictionary (OD) with each entry describing an individual AP object and its message data. The message data may consist of a number of characteristics defined for that particular object. The OD allows the FBAP of a device to be visible to the fieldbus communica tions system. Refer to the Fieldbus documentation for more information about OD.
8.22 System Management
System Management (SM) operates on special objects in the System Management Information Base (SMIB) which is part of the Management Virtual Field Device (VFD).
System Management Key Features
The key features of system management operation:
• Provide system application clock time synchronization
• Provide scheduling of function blocks
• Manage automatic device address assignment
• Provide tag search service
• System Management Information Base (SMIB)
The SMIB contains various objects that are associated with system management operation. Table 8.22 shows a listing of the SMIB object dictionary. Groups of objects (along with their starting index number) are included in the SMIB for the Logix 3400MD digital positioner. The numbers in parenthesis indicate the number of objects.
Supported Features
The features supported by system management include the key features listed above as well as the ones designated in Table 8.23. The object SM_SUP­PORT indicates which features are supported by system management in the FBAP. The features are mapped to the bits in the bit string shown below.
Table 8.21 System Management Supported Features
SM_SUPPORT bit Feature Supported?
0 Set physical device tag (agent) yes 1 Set field device address (agent) yes 2 Clear address (agent) yes 3 Identify (agent) yes 4 Locating function blocks (agent) yes 5 Set physical device tag (manager) no 6 Set field device address (manager) no 7 Clear address (manager) no
66
Page 67
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
8 Identify (manager) no
9 Locating function blocks (manager) no 10 FMS server role yes 11 Application clock synch (timeslave) yes 12 Scheduling function block yes 13 Application clock synch (time publisher) no
14 to31Reservedforfutureuse. no
SM_SUPPORT Bits
Any bit (of the object SM_SUPPORT) will be set that corresponds to a supported feature listed in Table 8.23. The resulting value in the object SM_SUP­PORT is 1C1F (hex).
SM Agent Objects
Four SM agent objects are contained in the SMIB object dictionary. One object, SM_SUPPORT, was described previously. The three other objects are timers associated with SM operations. Table 8.22 identifies the SM Agent objects with their object directory index and default values.
Table 8.22 SM Agent Objects
Object Description
SM_SUPPORT Variable that indicates the features supported by SM
in this device. See Table 8.22, Logix 3400MD Digital Positioner SMIB Object Dictionary
T1 Value of the SMstep timer in 1/32 of a millisecond
ticks.
T2 Value of the SM set address sequence timer in 1/32 of
a millisecond ticks.
T3 Value of the SM set address wait timer in 1/32 of a
millisecond ticks.
OD
Default Value
Index
258 0x1C1F
259 96,000* (3 seconds)
260 1,920,000* (60 sec-
onds)
261 480,000 * (15 seconds)
* The default value is specified by the communications profile for the application area
System Application Clock Time Synchronization
Each link in a fieldbus network contains an application clock time publisher responsible for distrib uting application time on the link.
A clock synchronization message is periodically sent by the time publisher to all fieldus devices. The application clock time is independently maintained in each device based on its own internal crystal clock.
Clock synchronization provides the capability for devices to time stamp data (events and alarms when they occur).
Sync and Scheduling Objects
These objects are used by system management to provide application clock synchronization and macro cycle scheduling for the device. Table
8.23 identifies the sync and scheduling objects with their object directory index and default values.
Table 8.23 SM Sync and Scheduling Objects
Object Description
CURRENT_TIME The current application clock time. 262 Dynamic
LOCAL_TIME_DIFF Used to calculate local time from CURRENT_TIME. 263 0
AP_CLOCK_SYNC_INTERVAL The interval in seconds between time messages on the link (bus). 264 Set by SM (mgr.) during address assignment
OD
index
DefaultValue
67
Page 68
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
TIME_LAST_RCVD
PRIMARY_AP_TIME_ PUBLISHER
TIME_PUBLISHER_ADDR The node address of the device which sent the last clock message. 267 Dynamic
Unused 268
MACROCYCLE_DURATION The length of the macro cycle in 1/32 of a millisecond ticks. 269 Set by SM (mgr.) during address assignment
The application clock time contained in the last clock message.
The node address of the primary time publisher for the local link (bus).
265
Dynamic
266
Set by SM (mgr.) during address assignment
Device ID, Tag Name and Device Address
Each fieldbus device on the network is uniquely identified by:
• Device ID that is set by the manufacturer to identify the device.
• Device Name (Tag) set by the user to identify operation
• Device Address - a unique numerical address on the fieldbus segment. Address may be set automatically by system management.
Address Assignment Objects
Table 8.24 is a description of the address assignment objects with their object directory index and default values.
Table 8.24 SM Address Assignment Objects
Object Description OD index Default Value
DEV_ID The device ID set by the manufacturer. 270
464C530201-VAL-LX1 400-0nnnnnnnn
PD_TAG The physical device tag to be set using SET_PD_TAG service. 271 All Spaces
OPERATIONAL_ Controls the state of SM of the device upon power-up. POWERUP
272 TRUE (SM goes opera tional after power up)
Virtual Field Device (VFD) List Objects Two objects identify the VFDs in the device:
Table 8.25 Virtual Field Device (VFD) List Objects
OD Index VFD_REF VFD_TAG
273 1 ‘MIB’ 274 2 ‘Resource’
Function Block Scheduling The SMIB contains a schedule, called the function block schedule, that indicates when that device’s function blocks are to be executed.
System Management schedules the start of each function block relative to the macro cycle of the device. The macro cycle represents one complete cycle of the function block schedule in a device. The macro cycles of all devices on the link are synchronized so that function block executions and their corresponding data transfers are synchronized in time.
Using the configurator software, the device’s function block schedule can be pre-configured.
Function Block Scheduling Objects
Four scheduling objects are defined in the Logix 3400MD digital positioner. Table 8.25 lists the func tion block scheduling objects with their object directory index and default values.
Table 8.25 Function Block Scheduling Objects
68
Page 69
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Object Description OD Index Default Value
VERSION_OF_SCHEDULE The version number of the function block schedule. 275 0
FBScheduleEntry#1 Default setting is the AO block 276
FBScheduleEntry#2 Default setting in the PID block 277
FBScheduleEntry#3 278 0xFFFFFFFF
FBScheduleEntry#4 Available 279 0
START_TIME_OFFSET
-0FB_OBJECT_INDEX-257 VFD_REF-1
START_TIME_OFFSET-16000 FB_OBJECT_INDEX-310 VFD_REF-1
8.23 Network Management
Network management provides for the management of a device’s communication system by an external network manager application.
Network management operates on special objects in the Network Management Information Base (NMIB) which is part of the Management Virtual Field Device (VFD).
Network Management Features
Network Management provides the following features:
Loading a Virtual Communication Relationship (VCR), which may be a list or a single entry. See VCR list objects.
• Loading/changing the communication stack configuration
• Loading the Link Active Schedule (LAS)
• Performance monitoring
Network Management Objects
CAUTION: Normally most of the network management objects appear transparent to the user. In other words, the parameters and objects used for network management are not normally viewed or changed as part of device configuration.
The network management objects in the Logix 3400MD digital positioner FBAP are listed in the following paragraphs, although most, (if not all) of these objects are not directly user-configured.
Network Management Information Base (NMIB)
The NMIB contains various objects that are associated with network management operation. Table 8.28 lists the NMIB object dictionary. The groups of network management objects (along with their index starting numbers) are included in the NMIB for the Logix 3400MD digital positioner. The numbers in parenthesis indicate the number of objects.
Virtual Communications Reference (VCR) Objects
The objects listed above contain parameters which define network management operations. These operations include communications between applica­tions in different field devices (or field devices and operator interface). In order for this communication to take place, a communications relationship must be set up using the network management objects and parameters. The parameters for this communication relationship are stored in a Virtual Communications
Reference (VCR) object.
VCR Attributes
The attributes for the VCR types (VCR name) defined in the Logix 3400MD digital positioner device are standard fieldbus attributes. There are 16 available VCR‘s available in the Logix 3400MD. For detailed descriptions of these attributes, see
69
Page 70
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Unsupported Services
The following is a list of services which are not supported (not used) in the Logix 3400MD digital positioner FBAP:
• FB_Action (all function blocks are static)
• Put_OD (all ODs are static)
• Domain upload
• Program invocation
• Reception of alert and trend indications
• Access protection and check of password
• AlertEventConditionMonitoring
• Write to variable lists
• Create/Modify/Delete variable lists
• Read and write access by name
• Phys Read, Phys Write
• Read With Type, Write With Type
• Information Report With Type
8.24 Logix 3400MD Digital Positioner Variable Enumeration
The following table defines the Logix 3400MD digital positioner variables enumeration.
CALIBRATE: This variable initiates calibration procedures, and reports current state of calibration during the procedure.
CONTROL PARAMETERS
Table 8.26 Control Parameters Table
Parameter Name Bit or Byte Values Description
TEST_MODE Bit 0 0x01
Bit 7 0x08
Calibrate 0
1 2 5
Calibration_Status Bit 0 0x01
Bit 2 0x04 Bit 4 0x08 Bit 5 0x20 Bit 6 0x40
SIG_FLAGS Bit 0 0X01
Bit 1 0x02 Bit 2 0x04 Bit 3 0x08 Bit 4 0x10 Bit 5 0x 20 Bit 6 0x40 Bit 7 0x80
Enagle diagnostic variable access Write to DAC value
Select Calibration Type Perform a Stroke Calibration Perform a Pressure and Friction Calibration ABORT Calibration Procedure
Stroke Calibration in Progress Pressure Calibration in Progress Setting Spool Offset Pressure Calibration Required Stroke Calibration Required
RUN/Begin Signature Signature Complete TEST REPEAT Mode Rum Ram Signature Valve INIT End of Singnature Data Encountered TEST DAC Mode Run Partial Stroke Test (PST)
70
Page 71
Parameter Name Bit or Byte Values Description
XD_FSTATE_OPT No Bit 0x00
Bit 1 0x01 Bit 2 0x02
CONTROL_CONFIG Bit 0 0X01
Bit 1 0x02 Bit 2 0x04 Bit 3 0x08 Bit 4 0x10 Bit 5 0x 20 Bit 6 0x40 Bit 7 0x80
MISC_CONFIG Bit 0 0X01
Bit 1 0x02 Bit 2 0x04 Bit 3 0x08 Bit 4 0x10 Bit 5 0x 20 Bit 6 0x40 Bit 7 0x80
USER_INTERFACE_ACTIVE Bit 0 0X0001
Bit 1 0x0002 Bit 2 0x0004 Bit 3 0x0008 Bit 4 0x0010 Bit 5 0x 0020 Bit 6 0x0040 Bit 7 0x0080 Bit 8 0x0100 Bit 9 0x0200 Bit 10 0x0400 Bit 11 0x0800 Bit 12 0x1000 Bit 13 0x2000 Bit 14 0x 4000 Bit 15 0x8000
LOAD_EE_DEFAULTS 0
1 2
CURVE_SELECT 0
1 2
Fail to Last Known Set Point Fail Valve Closed Fail Valve Open
Local Panel Disabled Continuous Friction Mode Enabled For Future Use Pressure Control Enabled Pressure Sensor Board Present Single Action Enabled For Future Use For Future Use
For Future Use For Future Use For Future Use For Future Use For Future Use For Future Use For Future Use For Future Use
Air Action ATO Enabled Characterization Linear Auto Tune Enabled Low Friction Mode Calibration Auto DIP SW 6 Spare Up Button Not Pressed Dn Button Not Pressed Bit 1 of Gain Selector Bit 2 of Gain Selector Bit 3 of Gain Selector For Future Use Qucik Cal Button Not Pressed For Future Use For Future Use For Future Use
Normal Operation Reset Non-Volatile Variables Reset Calibration Variables
Equal Percent Quick Opening Custom (CurveX,CurveY)
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Unit Parameters
Table 8.27 Unit Parameters Table
Parameter Name Bit or Byte Values Description
TRAVEL_UNITS 57 Percent PRESSURE_UNITS 6
7 10 12
INTERNAL_TMEP_UNITS 32
33
FRICTION_UNITS 0 Pounds
PSI BAR Kg/cm Kpa
Deg C Deg F
2
71
Page 72
Diagnostic Parameters
Table 8.28 Diagnostics Parameters Table
Parameter Name Bit or Byte Values Description
DIAGNOSTIC_LEVEL 0
2 3
PST_RESULT 0
1
CYCLE_TRAVEL_RESET Bit 0 0x01
Bit 1 0x02 Bit 2 0x04 Bit 3 0x08
TREND_STATE 0
1 3
Standard Advanced Pro
Fail Pass
Valve Cycle Reset Valve Travel Reset Spool Cycle Reset Spool Travel Reset
Unlock Trend Data Lock Trend Data Clear Trend Data
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Informational Parameters
Table 8.29 Informational Parameters Table
Parameter Name Bit or Byte Values Description
VALVE_MAN_ID 0
1 2 00
VALVE_TYPE 0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 99
Valtek Kammer NAF Other
Mark One Mark One-X Mark 100 Mark two Mark Six Mark Eight Mark Ten ShearStream SB ShearStream HP Maxflo 3 Valdisk BX HpFlow LinedFlow TotalFlow ColdFlow DrainFlow SmallFlow CleanFlow Multi-Z 020000 025000 030000 185000 FlowTop FlowPak FlowPro VariCool Setball Duball Trunnball Torex Unex Other
72
Page 73
Parameter Name Bit or Byte Values Description
VALVE_CLASS 0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 99
VALVE_CLASS 1
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 99
VALVE_ENDCON 0
1 2 3 4 5 99
VALVE_BODYMAT 0
1 2 3 4 5 6 7 8 9 10 11 99
0.25 inch / DN 6
0.5 inch / DN 15
0.75 inch / DN 20
1.0 inch / DN 25
1.25 inch / DN 32
1.5 inch / DN 40
2.0 inch / DN 50
2.5 inch / DN 65
3.0 inch / DN 80
4.0 inch / DN 100
5.0 inch / DN 125
6.0 inch / DN 150
8.0 inch / DN 200
10.0 inch / DN 250
12.0 inch / DN 300
14.0 inch / DN 350
16.0 inch / DN 400
18.0 inch / DN 450
20.0 inch / DN 500
24.0 inch / DN 600
28.0 inch / DN 700
32.0 inch / DN 800
36.0 inch / DN 900
40.0 inch / DN 1000 Other
CL 150 CL 300 CL 600 CL 900 CL 1500 CL 2500 CL 4500 PN 10 PN 16 PN 25 PN 40 PN 63 PN 100 PN 160 PN 250 PN 400 PN 4000 Other
Sep Flange Intergral Flange Weld End Flangeless/Wafer Clamped Screwed Other
Alloy 20 Aluminum Bronze Carbon Steel Special Alloy Hastelloy Inconel Monel 400 Nickel Titanium Type 304 Type 316 Other
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
73
Page 74
Parameter Name Bit or Byte Values Description
VALVE_PACKTYPE 0
1 2 3 4 99
LEAK_CLASS 1
2 3 4 5 6 99
VALVE_FLAGS 0
1 2 3 4 99
VALVE_TRIMMAT 0
1 2 3 4 99
VALVE_TRIMCHAR 0
1 2 3 99
VALVE_TRIMTYPE 0
1 2 3 4 5 6 7 8 9 10 11 12 13 99
Single Packing PTFE Single Packing Graphite Double Packing PTFE Double Packing Graphite Spring Loaded Other
Class I Class II Class III Class IV Class V Class VI Other
Flow Over Flow Under Shaft Upstream Shaft Downstream Shaft Center Other
Stainless Steel Sainless Steel Hardened Alloy 6 Soft Seated Special Alloys Other
Equal Percent (=%) Linear Quick Open Bi-Linear Other
Cav Control Channel Stream High Pressure Mega Stream Standard Tiger Tooth Stealth MicroCav CavStream MultiStream SilentPack Kammer Type I-III Z-Trim Multi Stage Other
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
74
Page 75
Parameter Name Bit or Byte Values Description
VALVE_TRIMNO 0
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 99
ACT_MAN_ID 0
1 2 3 4 5 6 99
ACT_FAIL_ACTION 0
1 2 3
ACT_TYPE 0
1 2 3 4 99
ACT_SIZE 0
1 2 3 4 5 6 7 8 9 10 12 13 14 15 16 17 18 19
0.10 - 0.12 in (2.5 - 3.0 mm)
0.13 - 0.15 in (3.1 - 3.8 mm)
0.16 - 0.19 in (3.9 - 4.8 mm)
0.20 - 0.24 in (4.9 - 6.1 mm)
0.25 - 0.30 in (6.2 - 7.6 mm)
0.31 - 0.37 in (7.7 - 9.4 mm)
0.38 - 0.45 in (9.5 - 11.4 mm)
0.46 - 0.55 in (11.5 - 14.0 mm)
0.56 - 0.67 in (14.1 - 17.0 mm)
0.68 - 0.81 in (17.1 - 20.6 mm)
0.82 - 0.98 in (20.7 - 24.9 mm)
0.99 - 1.18 in (25.0 - 30.0 mm)
1.19 - 1.42 in (30.1 - 36.1 mm)
1.43 - 1.7 in (36.2 - 43.0 mm)
1.8 - 2.1 in (44 - 54 mm)
2.2 - 2.7 in (55 - 68 mm)
2.8 - 3.3 in (69 - 84 mm)
3.4 - 4.1 in (85 - 103 mm)
4.2 - 4.9 in (104 - 125 mm)
5.0 - 6.0 in (126 - 152 mm)
6.1 - 7.3 in (153 - 184 mm)
7.4 - 8.8 in (185 - 223 mm)
8.9 - 10.5 in (224 - 268 mm)
10.6 - 12.7 in (269 - 322 mm)
12.8 - 15.2 in (323 - 386 mm)
15.3 - 18.2 in (387 - 462 mm)
18.3 - 21.8 in (463 - 552 mm) Other
Valtek Piston Kammer Valtek Diaphragm Rotary Automax NAF Valtek Diaphragm Linear Fisher Other
None Mechanical Fail Closed Mechanical Fail Open Mechanical Fail In Place
Linear (piston) Linear (diaphragm) Rotary (piston) Rotary (diaphragm) Rotary (Rack & Pinion) Other
Valtek Piston 25 Valtek Piston 50 Valtek Piston 100 Valtek Piston 100C Valtek Piston 150C Valtek Piston 200 Valtek Piston 200C Valtek Piston 300 Valtek Piston 400 Valtek Piston 500 Valtek Piston 600 Kammer 37 Kammer 38 Kammer 39 Kammer 3D Kammer 47 Kammer 48 Kammer 49 Kammer 4D
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
75
Page 76
Parameter Name Bit or Byte Values Description
ACT_SIZE 20
21 22 23 24 25 26 27 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 63 64 65 66 67 68 69 70 71 72 73 75 76 77 78 79 80 82 83 84 85
Kammer P0 Kammer P1 Kammer P2 Kammer P3 Kammer P4 Kammer P5 Kammer P6 Kammer P7 Valtek Diaphragm Rotary NR1 Valtek Diaphragm Rotary NR2 Valtek Diaphragm Rotary NR3 Automax B050D Automax B063D Automax B085D Automax B100D Automax B115D Automax B125D Automax B150D Automax B175D Automax B200D Automax SNA250 Automax SNA300 Automax R205 Automax R206 Automax R207 Automax R208 Automax R310 Automax R312 Automax R314 Automax R316 Automax R414 Automax R416 Automax R418 Automax R420 Automax R422 Automax R514 Automax R516 Automax R518 Automax R520 Automax R522 Automax R524 NAF 02 NAF 11 NAF12 NAF 21 NAF 22 NAF 31 NAF 32 NAF 41 NAF 42 NAF 51 NAF 52 Valtek Diaphragm Linear 127 Valtek Diaphragm Linear 252 Valtek Diaphragm Linear 502 Valtek Diaphragm Linear 700 Valtek Diaphragm Linear 1502 Valtek Diaphragm Linear 3002 Fisher 657-30 Fisher 657-34 Fisher 657-40 Fisher 657-45
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
76
Page 77
Parameter Name Bit or Byte Values Description
ACT_SIZE 86
87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 105
SPRING_TYPE 0
1 2 3 4 5 99
USER_INTERFACE_INSTANT Bit 0 0x0001
Bit 1 0x0002 Bit 2 0x0004 Bit 3 0x0008 Bit 4 0x0010 Bit 5 0x0020 Bit 6 0x0040 Bit 7 0x0080 Bit 8 0x0100 Bit 9 0x0200 Bit 10 0x0400 Bit 11 0x0800 Bit 12 0x1000 Bit 13 0x2000 Bit 14 0x4000 Bit 15 0x8000
Fisher 657-46 Fisher 657-50 Fisher 657-60 Fisher 657-70 Fisher 657-80 Fisher 657-87 Fisher 657-100 Fisher 667-30 Fisher 667-34 Fisher 667-40 Fisher 667-45 Fisher 667-46 Fisher 667-50 Fisher 667-60 Fisher 667-70 Fisher 667-80 fisher 667-87 Fisher 667-100 Other
88
Air Action ATO Enabled Characterization Linear Auto Tune Enabled Low Friction Mode Calibration Auto DIP SW 6 Spare Up Button Not Pressed DN Button Not Pressed Bit 1 of Gain Selector Bit 2 of Gain Slelector Bit 3 of Gain Selector For Future Use Quick Cal Button Not Pressed For Future Use For Future Use For Future Use
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
9 Calibration
9.1 Introduction
This section provides information about calibrating the Logix 3400MD digital positioner’s sensors.
9.2 Overview
About Calibration
When re-calibration is required, the Logix 3400MD digital positioner does not need to be removed from the process and may be calibrated in the field.
NOTE: Calibration will cause the valve to fully stroke, so calibration must not be initiated while the valve is on line in the process.
77
Page 78
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
CAUTION: The configurator application can be used to perform the calibration procedures. The software application is not a calibrated measurement source. It is a digital diagnostic tool that provides verification of device parameter values.
Calibration Process
In general, calibration procedures follow these processes:
1. Prepare the device. (Note: The transducer function block must be out-of-service in order to perform any calibration.)
2. Write to CALIBRATE.
3. Observe the positioner performance.
The calibration parameter values and calibration commands are written to the device using a fieldbus configuration application, (such as the NI-FBUS Configurator).
Alternatively, use the Re-Cal button on the Logix 3400MD digital positioner to perform the stroke calibration. Confirm that positioner is con­figured properly, then proceed.
1. Prepare the device and safe the area for the removal of the main housing cover.
2. Remove the cover.
3. Press and hold the Re-Cal button for at least five seconds to initiate the stroke calibration. (NOTE: The transducer block must be out-of-service before the
Re-Cal button will be active.) If Auto Tune is selected, this will also auto tune the positioner response.
4. Replace cover and return to operation. (Refer to Logix 3400MD Digital Positioner IOM for more details.)
9.3 Calibration
The output position of the Logix 3400MD digital positioner is calibrated using the transducer block CALIBRATE parameter. The positioner performance must be verified by the operator.
Calibration Parameters
Table 9.1 lists transducer block parameters and their values used in the calibration procedures.
Table 9.1 Transducer Block Calibration Parameters
Parameter Description Value - Meaning Comments
MODE_BLK The operating mode
of the transducer block
CALIBRATE One-byte value
which selects the calibration operation to be performed.
Permitted modes: The transducer block must be in the OOS mode to perform Logix
Auto — Auto (target mode) OOS — Out of Service 0 Normal operation. Valve tracks Calibration and correction commands are executed when the FINAL_VALUE
1 Initiates stroke calibration. Closes valve.
2 Initiates actuator pressure transducers calibration. 3 Moving valve closed position Messages only 4 Moving valve to open position 5 Calibrating Supply 6 Calibrating actuator sensor - closed 7 Calibrating actuator sensor - open 8 Monitoring of Re-Cal button. 9 Error occurred during calibration 10 Inner-loop offset adjustment Nulls the spool block
3400MD digital positioner calibration.
command is written.
78
Page 79
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
11 Auto Tune Positioner Only active when Re-Cal is done
PRESURE_ SUPPLY_ CAL_REF
Input referenc or actual supply pres­sure for calibration
JogCal - Waiting for user to set point
12
13 Range Checking 14 Normal Operation (Rev 0x23).
Checkjog call setting in MISC_FLAGS
0 – 150 psig max. Used to calibrate the span of the actuator pressure sensors
Initiates the monitoring of the button for five seconds
Jog Cal must be enabled in MISC_FLAGS before it can be initiated
Two-point Calibration
The Logix 3400MD digital positioner has two-point calibration. The stroke position feedback poten tiometer and the actuator pressure trans­ducers are calibrated this way. The positioner must be pre-configured to the proper air action and valve type (linear or rotary)before the calibration is done.
Procedure: Stroke and pressures are calculated when the user follows the steps below.
1. Using a fieldbus configuration application as the operator interface to device, set the transducer and resource block MODE_BLK parameter to OOS (Out
of Service).
2. For stroke, write the value 1 to CALIBRATE. The valve will close and then open automatically. The value will change values as the calibration continues. Once completed, CALIBRATE will return to ‘0.’ (This may take 10 seconds to ~2 minutes depending on the actuator size.)
3. For actuator pressure transducers (if so equipped), input the measured supply pressure (in psig) in PRESSURE_SUPPLY_CAL_REF. Write the value 2 to CALIBRATE. The valve will close and then open automatically. The value will change values as the calibration continues. Once completed, CALIBRATE will return to ‘0’ (This may take 1 minute to ~10 minutes depending on the actuator size.)
4. The positioner will return to tracking FINAL_VALUE.
5. Change MODE_BLK to desired mode
6. When calibration is completed, set transducer and resource block to auto mode to resume normal device operation.
Canceling Calibration
Write ABORT to CALIBRATE. The previous values are restored and CALIBRATE returns to NONE.
Additional Calibration Features
Re-Cal button: Re-Cal is a method by which the valve can be stroke-calibrated without using the fieldbus configurator. Important: This feature is provided to allow stroke calibration being initiated at the positioner. However, the Logix 3400MD digital positioner Transducer block must be placed in Out-of­Service mode for the button to become active. After completion of the calibration cycle, the block must be returned to normal mode for operation to resume.
Re-Cal only affects position calibration. Any previous configuration or stored information is not affected. Re-Cal must be used to Auto Tune the positioner.
79
Page 80
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
10 Troubleshooting
10.1 Introduction
This section contains information about identifying device faults and suggested actions to correct them. The approach to troubleshooting is determining the cause of the fault through definition of the symptoms (such as a device not visible on network or not able to write values to parameters).
The information is organized the following way:
• Device troubleshooting tables list some of the more commonly encountered faults and sugges tions to check in order to find out where the problem is and correct it.
• Positioner status tables define some of the conditions that cause critical or non-critical faults in the transmitter. Critical and non-critical faults are described and suggestions are given on where to find further information.
• Device diagnostics briefly explains about some of the background diagnostics that are active in the device during normal operation. Device parameters are described that provide information about hardware and software status within the device.
• Block configuration errors summarize conditions within the device which may be caused by configuration errors and suggestions on where to look to correct the errors.
• Simulation mode describes how to set up the transmitter to generate a user-defined simulated input. This feature is useful in debugging the system when the process is not running.
10.2 Overview
Device Status and Failures
Logix 3400MD digital positioner is constantly running internal background diagnostics to monitor the functions and status of device operation. When errors and failures are detected, they are reported in the status bits of various parameters in each block object, e.a. BLOCK_ERR or ERROR_DETAIL. Other parameters can be viewed showing a status description and/or a value which may identify a fault.
Device status and certain operational faults are identified by viewing the parameter status or values and interpreting their meaning using the tables in this section.
CAUTION: Additional diagnostics may be available through supervisory and control applications that monitor and control fieldbus networks. These diagnostics and messages are dependent upon the capabilities of the application and control system used.
Troubleshooting with the NI-FBUS Configuration Tool
The diagnostic messages generated by the Logix 3400MD digital positioner and block parameters can be accessed and evaluated using the NI-FBUS Con­figurator. Troubleshooting of some Logix 3400MD digital positioner faults and corrective actions also can be performed using the configurator.
Fault Summary
Diagnostic messages can be grouped into one of these three categories.
1. Non-critical Failures (Blink Code Starts Y) — Logix 3400MD digital positioner continues to calculate PV output.
2. Critical Failures (Blink Code Starts R)— Logix 3400MD digital positioner drives PV output to fail-safe state.
3. Configuration Errors — Incorrect parameter values may cause the Logix 3400MD digital positioner to generate a fault.
A description of each condition in each category is given in the following tables. The condition is described, a probable cause is stated and a recommended corrective action is given for each fault.
80
Page 81
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
10.3 Device Troubleshooting
Device Not Visible on Network
If the device is not seen on the fieldbus network, the device may not be powered up or possibly the supervisory or control program is not looking for (or polling) the node address of that device. (See Table 10.1 for possible causes and recommended actions.)
Table 10.1 Device Troubleshooting A
Symptom
• Device not visible on network
Possible Cause Items to Check Recommended Action
Device may have a node address that is with­in the unpolled range of addresses.
No power to the device. Measure the DC voltage at the device’s SIGNAL terminals.
Insufficient current to device Measure DC current to device. It should be between 23
More than two or less than two terminators wired to fieldbus link
Insufficient signal to device Measure the peak-to-peak signal amplitude; it should be:
Look at the following settings of the host system:
• First Unpolled Node
• Number of Unpolled Nodes
Voltage must be within the limits as shown in Table 4.2 on page 15.
and 27 mA. Check to see that only two terminators are present on
link.
• Output 0.75 to 1.0 Vp-p.
• Input 0.15 to 1.0 Vp-p. Measure the signal on the + and - SIGNAL terminals and
at a frequency of 31.25k Hz.
Set number of unpolled nodes to 0.
If no voltage or voltage is out of operating limits, determine cause and correct.
If current is insufficient, determine cause and correct.
Correct, if necessary.
If signal amplitude is insufficient, determine the cause and correct.
Incorrect or Non-compatible Tools
If the user is using non-compatible versions of fieldbus software tools, such as Standard Dictionary or Device Description (DD) files, or if the user is using the incorrect revision level of device firmware, then device objects or some block objects may not be visible or identified by name. (SeeTable10.2 for possible causes and recommended actions.)
Table 10.2 Device Troubleshooting B
Symptom
• Device and/or block objects not identified (UNKnown), or,
• Parameters are not visible or identified by name, or
• Flowserve-defined parameters are not visible.
Possible cause Items to check Recommended Action
Incorrect standard dictionary, de­vice description (DD) or symbols on host computer
Incorrect path-names to descrip­tions on host computer.
Incorrect revision of Device Re­source Block firmware
Verify that the standard dictionary, the DD or sym­bols files are correct for the device.
Check that the path name to locations of the stan­dard dictionary, and DD files on the host computer is correct.
Read the four (4) elements of the REVISION_ARRAY parameters: which are:
• Board Firware Rev
• Stack Rev Transducer Board Firmware Major Rev Transducer Board Firmware Minor Rev
Install the compatible version of standard dictionary and DD for the device on the host computer. See Fieldbus Device Version Checking on page xi.
Make sure that the path name of the standard dictionary and DD are in the correct location for the fieldbus software applica­tion. (C:\. . . \release\)
Perform a code download of the correct device firmware. See Code Download on page 133.
81
Page 82
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Incorrect revision level of the device firmware.
Read the three elements of the REVISION_ARRAY parameter, which are:
• Stack board firmware
• Stack board boot code
• Transducer board firmware NOTE: The numbers, when viewed as hexadecimal numbers, are in the format MMmm.Where, MM is the major revision number and mm is the minor revision number.
Perform a code download of the correct device firmware. See Code Download in section 11.
Non-functioning Blocks
• Device block objects may not be running (executing their function block schedules) or the blocks may be in Out-of-Service (OOS) mode. For example, if
the AO function block is in OOS mode, the block will not provide updated output values although the AO block may be running. When trouble shooting non­functioning block objects, start with the resource block. For example, if the resource block is in OOS mode all other blocks in the device will also be in OOS
mode. (See Table 10.3 for possible causes and recommended actions.)
Table 10.3 Device Troubleshooting C
Symptom
• Device output is not updating.
Possible Cause Items to Check Recommended Action
Resource block mode is OOS Read MODE_BLOCK. ACTUAL of Resource block. If necessary, set MODE_BLOCK.TARGET to Auto. Resource block is not running. Read the first element of BLOCK_TEST. Number should be
Incorrect revision of resource block firmware.
Incorrect revision level of the de­vice firmware.
Transducer block mode is OOS Read MODE_BLK . ACTUAL. Set MODE_BLK.TARGET to auto. NOTE: Transducer
Transducer block is not producing valid primary data.
Analog Output block mode is OOS Read MODE_BLK.ACTUAL of AO block. Set MODE_BLK .TARGET to auto. AO block is not initialized 1. CHANNEL 1. Set to 1
PID block is not initialized SHED_OPT Set to a value other than uninitialized. PID block mode is OOS Read MODE_BLK.ACTUAL of PID block. Set MODE_BLK.TARGET to Auto. PID block is not running. Read the first element of BLOCK_TEST. Number should be
increasing indicating that block is running. If block is not run­ning, check the second element of BLOCK_TEST.
Check BLOCK_ERR for other errors. See Sub-section 10.7 for details on BLOCK_ERR. If an error is present in BLOCK_ERR, then read ERROR_DE-
TAIL.
Read DEV_TYPE , DEV_REV, and DD_REV. See Incorrect or non-compatible tools above in
Read REVISION_ARRAY. See Incorrect or non-compatible tools above in
1. Read the first element of BLOCK_TEST. Number should be increasing indicating that block is running. If block is not run­ning, check the second element of BLOCK_TEST.
2. Read BLOCK_ERR. See Sub-section 10.7 for details on BLOCK_ERR.
3. Verify parameter FINAL_VALUE is not valid STATUS = good or uncertain VALUE = active
4. Read FINAL_POSITION VALUE; should contain the posi­tion. Isolate valve from process and check calibration.
2. SHED_OPT 2. Set to a value other than Un-initialized
increasing indicating that block is running. If block is not run­ning, check the second element of BLOCK_TEST.
If second element of BLOCK_TEST is not zero, write all zeroes to element.
Set RESTART to processor (or ‘4’) to soft-restart the device.
Sub-section 10.3.
Sub-section 10.3.
block must be in AUTO mode for the sensor signal to be passed to ‘AO block.’
If second element of BLOCK_TEST is not zero, write all zeroes to element.
Report information to factory.
If second element of BLOCK_TEST is not zero, write all zeroes to element. Download valid schedule to device.
82
Page 83
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
10.4 Device Diagnostics
Logix 3400MD Digital Positioner Memory
The Logix 3400MD digital positioner contains a number of areas of memory. An EEPROM provides a non-volatile memory area for static and non-volatile parameter values. The positioner also contains areas of RAM and ROM.
Background Diagnostics
Block objects (resource, transducer and function blocks), the communications stack and other device objects each have a designated area of memory where their database resides. Diagnostic routines are performed in the background during device operation which check the integrity of these individual databases. When a failure is detected, a status bit is set in the BLOCK_ERR parameter in the appropriate block object.
Diagnostic checks are performed continuously on the device functional databases of the Logix application shown in Table 10.4.
Table 10.4 Areas of Device Memory Where Data is Stored
Device Functional Area Location
Block object database (DB) RAM and EEPROM Communication stack database (DB) RAM and EEPROM Boot ROM ROM Program ROM ROM
Trend and link object databases (DB) RAM and EEPROM
BLOCK_ERR Parameter
BLOCK_ERR parameter shows diagnostic faults of hardware and software components within the transmitter. Each block object in the transmitter device application contains a BLOCK_ERR parameter. BLOCK_ERR is actually a bit string which provides a means to show multiple status or error condi tions. A status message identifying the fault can be viewed by accessing the parameter. Table 10.5 shows the bit mapping of the BLOCK_ERR parameter
To verify that block and background diagnostics are executing in a particular block: If the first element of the parameter (BLOCK_TEST = ) is incrementing, the block is executing and the diagnostics are active.
CAUTION:
If the first element value is not increasing, the block is not executing.
Table 10.5 BLOCK_ERR Parameter Bit Mapping
BLOCK_ERR Bit Message Name* Description
No bit set NO_ERROR If no bits are set there is no error 0 OUT_OF_SERVICE Indicates the block is out of service (OOS) 1 POWER_UP Not used 2 NEEDS_MAINT_NOW This indicates that the device needs maintenance now. Diagnostics has indicated that something has failed
3 REEDBACK_CHECK_
FAILED
4 LOST_NV_DATA EEPROM write to block DB failed, EEPROM write to Stack DB failed (Resource block only), EEPROM write
5 LOST_STATIC_DATA Block Non-Volatile (NV) memory failure Stack NV memory failure Link or Trend Object NV memory failure 6 MEMORY_FAILURE Not used 7 OUTPUT_FAILURE Indicates there was an output failure to the transducer block (AOand DO blocks only) 8 INPUT_FAILURE Indicates there was an input failure to the block (AO, DI and DO blocks only)
causing the positioner to not be able to operate. (Transducer block only). Communication failure to serial EEPROM (Resource block only) (Checksum Error)
to Link or Trend DB failed (Resource block only)
View the BLOCK_TEST parameter of the block.
83
Page 84
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
9 NEEDS_MAINT_SOON This indicates that the device needs maintenance soon. Diagnostics has indicated something is out of
10 FAULT_STATE_SET Indicates if the fault state has been set (Resource Block only) 11 LOCAL_OVERRIDE Indicates if the block has gone into Local Override mode (LO) 12 SIMULATE_ACTIVE The SIMULATE parameter is being used as the input to the AO block. This occurs if the simulate jumper is
13 LINK_CONFIG_ERR Set by the system. Indicates if all the links for the block configurations are available 14 BLOCK_CONFIG_ERR Invalid parameter value in block. See Clearing Block configuration Errors 15 OTHER
* Depending on the fieldbus interface application, device operating status and parameter values may appear as text messages. The text in the table is typi­cal of values or messages seen when using the NI-FBUS Configurator
tolerance or is going to fail, causing the positioner to possibly be operating with reduced functionality (Transducer block only)
set to Y on the electronics board and the ENABLE_DISABLE field of the SIMULATE parameter is set to 2
Table 10.6: Transducer Block BLOCK_ERR diagnostics mapping
Diagnostic Flag BLOCK_ERR Alarm Issued
POSITION_DEVIATION _ALARM BLK_ERR_DEV_NEEDS_MAIN_NOW FACTORY_RESET_STATE BLK_ERR_DEV_NEEDS_MAIN_NOW STROKE_CAL_REQUIRED BLK_ERR_DEV_NEEDS_MAIN_NOW SUPPLY_PRESS_LOW_ALARM BLK_ERR_DEV_NEEDS_MAIN_NOW LOSS_INTERBOARD_PCB BLK_ERR_DEV_NEEDS_MAIN_NOW MECHANICAL_STATUS not ZERO BLK_ERR_DEV_NEED_MAINT_SOON ELECTRONIC_STATUS not ZERO BLK_ERR_DEV_NEED_MAINT_SOON SUPPLY_PRESS_HIGH_WARNING BLK_ERR_DEV_NEED_MAINT_SOON SUPPLY_PRESS_LOW_WARNING BLK_ERR_DEV_NEED_MAINT_SOON PORT_A_VALUE_OUT_OF _RANGE BLK_ERR_DEV_NEED_MAINT_SOON PORT_B_VALUE_OUT_OF_RANGE BLK_ERR_DEV_NEED_MAINT_SOON PORT_A_RANGE_TOO_SMALL BLK_ERR_DEV_NEED_MAINT_SOON PORT _B_RANGE_TOO_SMALL BLK_ERR_DEV_NEED_MAINT_SOON PNUEMAITC_LEAK_WARN ING BLK_ERR_DEV_NEED_MAINT_SOON SPOOL_STICKING_WARNING BLK_ERR_DEV_NEED_MAINT_SOON SPOOL_STICKING_ALARM BLK_ERR_DEV_NEED_MAINT_SOON SPOOL_CYCLES_WARNING BLK_ERR_DEV_NEED_MAINT_SOON SPOOL_TRAVEL_WARNING BLK_ERR_DEV_NEED_MAINT_SOON HALL_SENSOR_UPPER_POSITION BLK_ERR_DEV_NEED_MAINT_SOON HALL_SENSOR_LOWER_POSITION BLK_ERR_DEV_NEED_MAINT_SOON FEEDBACK_RANGE_TOO_SMALL BLK_ERR_DEV_NEED_MAINT_SOON POSITION_OUT_OF_RANGE_LOW BLK_ERR_DEV_NEED_MAINT_SOON POSITION_OUT_OF_RANGE_HIGH BLK_ERR_DEV_NEED_MAINT_SOON NO_MOTION_TIME_OUT BLK_ERR_DEV_NEED_MAINT_SOON NON_SETTLE_TIME_OUT BLK_ERR_DEV_NEED_MAINT_SOON INNER_LOOP_OFFSET_TIME_OUT BLK_ERR_DEV_NEED_MAINT_SOON JOG_CALIBRATE_SET_100_POS BLK_ERR_DEV_NEED_MAINT_SOON
10.5 Block Configuration Errors
Configuration Errors
Block configuration errors prevent a device block from leaving OOS mode. The BLOCK_ERR parameter (bit 1) shows whether a block configu­ration error is present. Table 10.7 summarizes the conditions that may be the result of block configuration errors, which in turn cause a device fault. Follow the recommended actions to correct these errors.
84
Page 85
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Table 10.7 Summary of Configuration Errors
Problem/Fault Probable Cause Recommended Action
Name of parameters are not visible
Unable to write successfully to MODE_BLK of any block.
Unable to write to a parameter
Missing or incorrect version of device description file on host computer.
Mode not supported in TARGET and/or PERMITTED modes for the given block.
1. Parameter is read-only. 1. None
1. Check path to device description.
2. Load correct version of DD.
• Verify that the mode being written is supported by the block.
• If writing TARGET mode only, then the desired mode must already be set in the PERMITTED field.
• If writing the whole MODE_BLK record, then the mode set in TARGET must also be set in the PERMITTED field. Other modes may also be set in the PERMITTED field, but target mode must be set.
Unable to change resource block to auto mode
Unable to change analog output block from OOS mode
2. Sub-index of the parameter is read-only. Some parameters have fields that are not writable individually (such as MODE_BLK. ACTUAL).
3. Write-locking is active. Resource block parameter WRITE_LOCK value is 2.
4. Corresponding block is in the wrong mode. Some parameters can only be written to in OOS mode only, or in OOS or manual modes.
5. Data written to the parameter is out of the valid range for that parameter.
1. The second element of BLOCK_TEST is not zero.
2. Resource block is in OOS mode. 2. Write auto mode to MODE_BLK.TARGET of the resource block.
3. The second element of BLOCK_TEST is non-zero.
4. A configuration error occurred in the block.
1. The block has not been configured to
execute. It is neither in the function block schedule in the system management information base, nor is it linked to another executing block via the next block to execute field in the block record (relative parameter index).
2. Resource block is in OOS mode. 2. Write auto mode to MODE_BLK of resource block.
3. Block configuration error. 3. a. Check the parameters SHED_OPT and CHANNEL. All values must be
4. The second element of BLOCK_TEST is not zero.
2. None
3. Remove write protect jumper (see Subsection 6.5)
4. Write valid mode to MODE_BLK parameter of block (OOS or MAN modes). See Mode Restricted Writes to Parameters in Sub-sections 8.6 and 8.7.
5. Write valid range values to parameter.
1. Write all zeroes to the second element of the BLOCK_TEST parameter.
3. Write all zeroes to the second element of the BLOCK_TEST parameter.
4. Find and correct any configurable parameter outside its valid range. See
Clearing Block Configuration Errors in Sub-section 10.6.
1. Build and download an execution schedule for the block including links to and from AO block with other function blocks.
non-zero.
b. BLOCK_ERR for bit 1 set. If set, check all configurable parameters for
possible invalid values. See Clearing Block Configuration Errors in Sub­section 10.6.
4. Write all zeroes to the second element of the BLOCK_TEST parameter.
85
Page 86
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
AO block is in the correct mode but does not seem to be operating
1. Simulation active. 1. Disable simulation. See Sub-section 10.8 for procedure.
2. The block has not been configured to execute. It is neither in the function block schedule in the system management in­formation base, nor is it linked to another executing block via the next block to execute field in the block record (relative parameter index 0).
3. The second element of BLOCK_TEST is not zero.
2. Build and download an execution schedule for the block including links to and from AO block with other function blocks.
3. Write all zeroes to the second element of the BLOCK_TEST parameter.
10.6 Clearing Block Configuration Errors
Clearing Block Configuration Errors
Table 10.8 and Table 10.9 list the parameters in the AO and PID blocks which can cause the status bit of block configuration error to be set in their respective BLOCK_ERR parameters. The tables also provide the initial values and the valid range for the parameters.
NOTE: Block configuration errors can only be cleared if the function block is being executed (running). One way of determining block execution is by doing a series of two or three reads of the BLOCK_TEST parameter and confirming that the first byte of the parameter is incrementing. This will work if the execute rate is fast relative to the speed of reading BLOCK_TEST. A very slowly executing block may not appear to execute because block parameters are updated only when the block executes.
Table 10.8 AO Block Parameters
Parameter Initial Value Valid Range Corrective Action
ALERT_KEY 0 non-zero Initial value is a configuration error. Set value to non-zero number.
SIMULATE 1(disabled) 1-2 (disabled-enabled) Set value in valid range.
XD_SCALE 0to100
CHANNEL 0 1-2 Initial value is a configuration error. Set value to valid range.
SP_RATE_DN SP_RATE_UP
SP_HI_LIM, 100 0-100 Set value to valid range. SP_LO_LIM 0 0-100 Set value to valid range.
SHED_OPT 0
BYPASS 0 1:OFF,2:ON Initial value is a configuration error. Set value in valid range.
SHED_OPT 0
HI_HI_LIMHI_LIM
LO_LIMLO_LO_LIM
OUT_HI_LIM OUT_LO_LIM
SP_HI_LIMSP_LO_LIM
+INF 0-15 Set value to valid range.
+INF +INF
-INF
-INF 100
0
100 0
EU_100 > EU_0, UNITS_INDEX matches output of transducer block
1-8(seeShedOptionsinthe FFspecs.)
1-8(seeShedOptionsinthe FFspecs.)
PV_SCALE,-INF Values must be set in rank order.
OUT_SCALE+/-10% Verify that OUT_HI_LIM > OUT_LO_LIM.
PV_SCALE+/-10% Verify that SP_HI_LIM > SP_LO_LIM.
Set values to valid range(s).
Initial value is a configuration error. Set value in valid range.
Initial value is a configuration error. Set value in valid range.
PV_SCALE, +INF Values must be set in rank order
(e.g.LO_LIM > LO_LO_LIM but < HI_LIM etc.)
86
Page 87
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Table 10.9 PID Function Block Parameters
Parameter Initial Value Valid Range Corrective Action
BYPASS 0 1:OFF,2:ON Initial value is a configuration error. Set value in valid range.
SHED_OPT 0 1-8(see Shed Options in the FF specs.) Initial value is a configuration error. Set value in valid range.
HI_HI_LIM HI_LIM
LO_LIM LO_LO_LIM
OUT_HI_LIM OUT_LO_LIM
SP_HI_LIM SP_LO_LIM
+INF +INF
-INF
-INF
100 0
100 0
PV_SCALE, +INF
PV_SCALE, -INF Values must be set in rank order.
OUT_SCALE +/-10% Verify that OUT_HI_LIM > OUT_LO_LIM.
PV_SCALE +/-10% Verify that SP_HI_LIM > SP_LO_LIM.
Values must be set in rank order (e.g.LO_LIM > LO_LO_LIM but < HI_LIM etc.)
10.7 Additional Troubleshooting
As a general rule, follow the suggestions for corrective action for suspected problems described this document. If a problem is still present, perform step 1 below. If the problem still persists, perform step 2 and so on.
1. In the resource block set the RESTART parameter to ‘Processor’. Then return to ‘run’.
2. Cycle power to the Logix 3400MD digital positioner
3. Re-start fieldbus driver software on the host computer with the Logix 3400MD digital positioner un-powered, then power-up the Logix
3400MD digital positioner.
4. Call Flowserve’s Valtek Control Product Technical Assistance. (See Technical Assistance on page 10.)
10.8 Simulation Mode
Simulation Mode Dip Switch
A simulation mode is available in the positioner, which is used to aid in system debug if the process is not running. When simulation mode is enabled, the SIMULATE parameter in the AO block provides a user-selected value as the readback input to the AO block.
Setting Simulation Dip Switch
ATTENTION: A hardware dip switch on the main PCB cover is set to enable or disable the S IMULATE parameter. See Figure 10.1 for dip switch selection. Table 10.10 shows how to set the simulation dip switch on the main PCB cover.
DIP Switch Block
Off
FF Simulate Dip Switch
Figure 10.1 Simulation DIP Switch Location on the PCB Cover
On
87
Page 88
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Table 10.10 Setting the Simulation Dip Switch
To Set the Dip Switch to:
Enable read and write access to the device’s configuration. (Factory-set default)
Off position on the dip switch.
Off
On
Enable read only access to device’s configuration. (Write-protect) On position on the dip switch.*
Off
On
Enabling Simulation Mode
The SIMULATE parameter is enabled by setting the hardware simulation jumper to the Y position.
Additionally, AO block SIMULATE parameter must be set to the following values: SIMULATE
STATUS = Good: :[alarm status]: constant (suggested setting)
SIMULATE_VALUE = (supplied by user) used as the readback input to the AO block.
ENABLE_DISABLE = Active enabled
Simulation Mode Truth Table
The truth table in Table 10.11 shows the states of the simulation jumper and SIMULATE parameter to activate the simulation mode.
Table 10.11 Simulation Mode Truth Table
When the Simulation Dip Switch on main PCB cover is set to:
Off Position Simulation Disabled Simulation Disabled On Position Simulation Disabled Simulation Active
Simulation Mode A simulation mode is available in the AO function block to set the value and status of READBACK when it is necessary to override the transducer value or status.
... and the SIMULATE Enable_Disable is set to:
1 (Disabled) 2 (Active)
The SIMULATE parameter contains the following elements:
• SIMULATE_VALUE Contains the value that is copied to the READBACK parameter.
• SIMULATE_STATUS Contains the status that is copied to the READBACK parameter.
• TRANSDUCER_VALUE Contains the value read from the transducer position source.
• TRANSDUCER_STATUS Contains the status read from the transducer position source.
• ENABLE_DISABLE Enables simulation of the SIMULATE_VALUE and SIMULATE_STATUS when selected.
Enabling Simulation
Before the ENABLE_DISABLE in the SIMULATE parameter may be selected, the hardware simulation must be enabled for the device.
To enable simulation in the device, set the SIMULATE dip switch to the “On” position, select RESTART_PROCESSOR in the Resource block RESTART parameter.
To ensure that simulate is permitted in the device, go to the Resource Block and read the BLOCK_ ERR parameter. It should indicate Simula­tion Enabled.
Simulating the Transducer
To simulate the READBACK parameter, set the SIMULATE parameter as follows:
88
Page 89
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
1. Set ENABLE_DISABLE to ACTIVE and write the parameter.
2. Set SIMULATE_VALUE and SIMULATE_STATUS as desired and write the parameter.
3. Read the READBACK parameter. This should reflect the value and status which was set in the SIMULATE parameter.
NOTE: The TRANSDUCER_VALUE and TRANSDUCER_STATUS will continue to be updated by the transducer source as described in the next
section.
Transducer Position Source Selection
The source of the TRANSDUCER_VALUE and TRANSDUCER_STATUS in the SIMULATE param
eter is determined by the FEATURE_SEL parameter in the Resource Block. If FEATURE_SEL OUT_READBACK not selected (default) then the transducer source will be the AO OUT parameter. If FEATURE_SEL OUT_READBACK is selected then the transducer source will be the FINAL_ POSITION_ VALUE from the Transducer Block.
Because the FINAL_POSITION_VALUE in Logix 3400MD transducer block reflects the actual actuator position, the OUT_READBACK feature should be always be selected during normal operation.
AO Block Mode
To connect the AO block input to the output, the AO block must be in AUTO mode.
10.9 Logix 3400MD Digital Positioner
Troubleshooting Guide
Table 10.12 Symptom Chart
Failure or Problem Probable Cause(s) Refer to Section(s)
Mounting and Installation
LED won’t blink 1. Input voltage not correct 1. See Electrical Wiring Summary in Sec-
2. Termination may be incorrect.
3. Calibration is in process.
Valve moves in wrong direction with no change in input signal
Unit does not respond to fieldbus command. 1. Unit is not configured correctly. 1. See Theory of Operation on page 3.
Calibration
LEDs blink RGGY after a Re-Cal operation. Valve stays in fully open or closed position.
On a rotary, valve has a dead band at the fully open or closed position.
Control and Tuning
Valve won’t saturate at closed position. 1. May need to enable MPC 1. See MPC in Section 8.
Valve won’t go below or above a certain limit. 1. Soft limits are not enabled 1. See Advanced Features in Section 10.
1. May be tubed for wrong air action.
2. Spool stuck.
2. Error occurred during calibration. 2. See Calibration in Section 9.
1. Configured for linear on a rotary mounting. 1. See Re-Cal button Section 9.
2. Feedback linkage out of range.
1. Valve didn’t fully stroke during calibration (low or no air supply).
2. Stuck Spool. 2. See Spool Valve instruction in Logix 3400MD Digi-
1. Mechanical travel is not centered within the electrical measurement range (position sensor out of range).
2. Calibration required.
2. MPC is not enabled
tion 5.
1. See Air Action in Section 6.
2. See Spool Valve instructions in Logix 3400MD Digital Positioner IOM.
1. See Re-Cal button Section 9.
tal Positioner IOM.
1. See Linear vs. Rotary in Section 6.
89
Page 90
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Sticking or hunting operation of the positioner. 1. Contamination of spool valve assembly 1. See Air Supply Requirements on page 15. See
2. P+I setting incorrect
3. Excessive Stiction 3. Enable Hi Friction Feature
Large initial deviation; only present on initial power-up.
Stem position movement is not linear with com­mand.
Fieldbus Communication
Logix 3400MD digital positioner will not com­municate with fieldbus.
Configurator displays ‘Unknown’ after it con­nects.
Erratic communications occur. 1. Maximum cable length or impedance exceed-
Alarms
Temperature alarm occurs. 1. Ambient temperature has exceeded electronics
Hall sensor alarm occurs. 1. Hall connector may have bad connection
Modulator current alarm occurs. 1. Modulator minimum pressure may be too low. 1. See Modulator current Alarm in Section 8.
EEPROM checksum alarm occurs. 1. Error when reading non-volatile memory stor-
Multiple internal flags occur. 1. Bad micro-controller on main PCB assembly.
LEDs
LED four blink sequence begins with green 1. Any sequence beginning with a green light is a
LED four blink sequence begins with yellow 1. Any sequence starting with a yellow light indi-
LED four blink sequence begins with red 1. Any sequence starting with a red light indi-
Advanced Features
Will not display pressure readings. 1. Is configuration set to advanced? 1. See Standard vs. Advanced Diagnostics in Sec-
MPC will not function. 1. Is lower soft limit >= 0%. 2. Set-point should
1. Inner loop offset not correct. 1. See Setting P+I Parameters in Section 10.
1. Custom characterization is enabled 1. See Custom Characterization in Section 10.
1. Power problem. 1. See Wiring the Logix 3400MD Digital Positioner to
2. FB card connection. 2. Verify FB protocol being used.
1. DD has not been loaded in the configurator correctly.
ed
2. Card not receiving enough power. (Laptop bat­teries possibly low)
3. Interference with I.S. barrier
ratings
2. Sensor may be damaged
3. Low air supply pressure 3. Check air supply
2. Clogged orifice
3. Bad cable connection
age
normal operating mode .
cates that the unit is in a special calibration or test mode, or that there was a calibration problem.
cates that there is an operational problem with the unit
be 1 percent hysteresis around MPC.
Spool Valve in Section 10.
2. See Setting P+I Parameters in Section 10.
a Fieldbus Network on page 19.
1. Reload DD making sure Valtek products are listed.
1. See Wiring the Logix 3400MD Digital Positioner to a Fieldbus Network on page 19.
2. Refer to AGA-181 for Network checkout proce­dure.
1. See Temperature Alarm in Section 8.
1. See Hall sensor Alarm in Section 8.
1. See EEPROM checksum Alarm in Section 8.
1. Go to Section 7.9 in the Logix 3400MD IOM
1. Go to Section 7.9 in the Logix 3400MD IOM
1. Go to Section 7.9 in the Logix 3400MD IOM
tion 10.
1. See MPC in Section 8.
10.10 Internal Positioner Issues
Positioner Inner loop Control and Tuning
Setting P+I Parameters: Using the configurator, the user can set individual tuning parameters. To use the Auto Tune feature of the Logix 3400MD refer to section 7.4 in the Logix 3400MD IOM. A few key points are mentioned below.
GAIN_UPPER, GAIN_LOWER and GAIN_MULT: These three parameters are related by the following formula.
Proportional gain = maximum gain - | deviation | x gain multiplier
If proportional gain < minimum gain, then proportional gain = minimum gain
90
Page 91
Maximum Gain (GAIN_UPPER)
Proportional Gain
| deviation |
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Gain Multiplier (Determines Slope) (GAIN_MULT)
Minimum Gain (GAIN_LOWER)
spetS egraLspetS llamS
Figure 10.2 Gain Effect Diagram
This algorithm allows for quicker response to smaller steps yet stable control for large steps. (Refer to Figure 10.2.) Setting the gain multiplier to zero and max gain = min gain results in a typical fixed proportional gain.
The higher the gain multiplier, the larger the required deviation before the gain increases. Default values upon initiating a reset to the factory defaults are maxi­mum gain= 2.0, minimum gain = 1.0, and gain multiplier = 0.05. These values will allow stable control on all Valtek control product actuator sizes.
Integral Gain (IGAIN): The integral gain is primarily for deviations due to temperature drift within the inner loop spool control. The factory default value is
10. Although higher numbers can speed the time it takes to reach zero deviation, it can add overshoot if too large. It is recommended that maximum and minimum gains be adjusted while leaving Integral Gain fixed at 10. Integration is disabled below a stem position of 3 percent and above a stem position of 97 percent. This is to prevent integration windup from calibration shifts due to lower pressure or a damaged seat which may prevent fully closing the valve.
Integration Summer: The integral summer within the Logix 3400MD digital positioner is clamped at +20.00 percent and –20.00 percent. If the integration summer is fixed at +20% or –20%, it usually indicates a control problem. Some reasons for a clamped integration summer are listed below:
• Stroke calibration incorrect
• Any failure which prevents stem position movement: stuck spool, handwheel override, low pressure.
• Incorrect inner loop offset
• Loss of air supply on a fail in place actuator
Writing a zero to integral gain will clear the integral summer. The integral gain can then be returned to its original value.
Inner Loop Offset (IL_OFFSET): Referring to Figure 1.3 in section 1, three control numbers are summed to drive the inner loop spool position control: pro­portional gain, integral summer, and inner loop offset. Inner loop offset is the parameter that holds the spool in the null or balance position with a control deviation of zero. This value is written by the positioner during stroke calibration and is a function of the mechanical and electrical spool sensing tolerances. However, if replacing the Driver Module Assembly is necessary, or the software reset has been performed, it may be necessary to adjust this value. The method below should be used to adjust inner-loop offset. Or simply perform a new stroke calibration.
From the fieldbus configurator,
91
Page 92
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
• Send a 50 percent command.
• Set integral to zero.
• Locate the DAC_PERCENT
• Write this percentage value to IL_OFFSET.
• Write original value to Integral
Table 10.13 Logix 3400MD Digital Positioner Factory Tuning Sets
Brand Tuning Set GAIN_LOWER GAIN_UPPER GAIN_MULT lgain Comparable
Valtek VFactory_A 1.00 2.00 0.05 10.0 25 sq. in.
VFactory_B 1.00 2.50 0.05 10.0 50 sq. in. VFactory_C 2.00 3.00 0.05 10.0 100 sq. in. VFactory_D 4.00 5.00 0.05 10.0 200 sq. in. VFactory_E 4.00 7.00 0.05 10.0 300 sq. in.
Kammer Trooper 48 0.40 0.50 0.05 25.0 31 sq. in.
Trooper 49 3.00 4.00 0.05 10.0 77.5 sq. in.
Automax R1 0.30 0.50 0.05 10.0 3 to 5 sq. in.
R2 1.00 1.50 0.05 10.0 9 to 12 sq. in. R3 1.30 2.00 0.05 10.0 16 to 19 sq. in. R4 2.00 2.50 0.05 10.0 27 to 37 sq. in. R5 2.50 3.60 0.05 10.0 48 to 75 sq. in. R6 4.00 5.00 0.05 10.0 109 sq. in.
Actuator
Spool Valve
The spool valve is a four-way directional valve with precision features to provide optimal control and low air consumption. To help prevent spool valve malfunction, the positioner supply air must conform to ISA Standard S7.3 (a dew point at least 18 degrees below ambient temperature, particle size below 1 microns, oil content not to exceed 1 part per million). Flowserve’s standard coalescing filter is highly recommended to help meet these require­ments.
Small particles, oil that has varnished, corrosion, ice, burrs, and extreme wear could cause the spool valve to act abnormally. If the spool valve is suspected of sticking, it can be inspected by performing the following.
1. Make sure the valve is bypassed or in a safe condition.
2. Disconnect the power and air supply to the unit.
3. Remove the spool valve cover by removing the screw and sliding the cover assembly backwards until the tab is clear of the slot.
4. Inspect the coalescing filter element in the spool valve cover for signs of oil, water and debris that may have come from the air supply. A clean filter
is white.
5. Remove the two phillips-head screws holding the spool valve to the housing. Inspect the free movement of the spool by carefully sliding the block up and down on the spool about 0.25 inches. The block should slide on the spool with no resistance. Carefully remove the block, ensuring it is removed concentric with the spool.
6. Inspect the block and spool for oil, water, debris and wear. If oil, water and/or debris are found, the spool and block can be cleaned with a non-residue cleaner, lint-free cloth and soft bristle brush. If wear is found, replace the driver module assembly per the IOM manual.
7. Before re-assembly, verify that the three O-rings are in the counter-bores on the machined platform where the spool valve block is to be placed.
92
Page 93
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
8. Carefully slide the block over the spool, using the machined surface of the housing base as a register. Slide the block toward the driver module until the two retaining holes line up with the threaded holes in the base. If resistance is still encountered, re-clean both parts or replace the driver module assembly. Refer to the IOM manual for spare part kit numbers.
Refer to the instructions in the Logix Series 3400MD Digital Positioner IOM under Driver Module Assembly for further instructions.
Advanced Features
Standard vs. Advanced Diagnostics
Answer: The model with advanced diagnostics adds top and bottom sensors. This allows for the collection of data for more diagnostic calculations, such as
loss of pressure, friction, advanced signatures, and troubleshooting.
Question: Can I upgrade from a standard to an advanced model?
Answer: Yes. Advanced pressure board assembly can be purchased (see IOM). Simply install the advanced pressure board. All connectors on the pressure
board are keyed and unique for easy cable re-connection. Using FB configurator, perform an actuator pressure calibration.
Temperature and Pressure Units: The desired temperature and pressure units can be set during configuration. Once set, all readings will be displayed in the desired units. Parameters TEMP_UNITS and PRESS_UNITS in the transducer block.
Stroke Length: Stroke length is used by the travel accumulator (TRAVEL_ENG). When the stroke length and units are set, the length is used to determine the total travel accumulated. The travel accu mulator will have the units associated with stroke. Parameters STROKE_ENG and TRAVEL_UNITS in the transducer block.
Example: Stroke length is set to 4 inches. If the valve is moved from 0 percent to 100 percent, 4 inches will be added to the travel accumulator. The travel accumulator units will be inches. If stroke length is 90 degrees for a rotary, the travel accumulator will now have units of degree. A 0 percent to 100 percent stroke will add 90 to the travel accumulator.
NOTE: Stroke length is for information only.
Custom Characterization: Custom characterization can be thought of as a soft cam. The user can choose between an equal percentage, quick opening, or
custom user-defined characterization curve using 21-points. The control will linearly interpolate between points. Points do not have to be equally spaced in order to allow more definition at critical curve areas.
The Logix 3400MD digital positioner has two modes: linear and characterization. Linear is a straight 1:1 mapping of command to control command. It does not use the 21-point curve definition. When custom characterization is disabled, the positioner is automatically in linear mode. If custom charac­terization is enabled, the Logix 3400MD digital positioner uses one of the 21-point user defined curves.
Question: Does a default custom characterization curve exist?
Answer: Yes. The Logix 3400MD digital positioner comes with a factory-default equal percent (and quick opening) curve in Figure 10.3.
NOTE: The quick opening curve is the inverse of the equal percent curve.
Table 10.14 Logix 3400MD Digital Positioner Characteristic Curves
FINAL_VALUE (%FS) Quick Open
0 0.0 0.00 0 5 18.8 1.00 5 10 37.6 2.00 10 15 56.4 3.00 15 20 74.0 4.00 20 25 84.3 5.24 25 30 90.0 6.47 30 35 92.0 8.02 35
CMD_USED (%FS)
Equal Percent
Linear
93
Page 94
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
40 93.4 9..57 40 45 94.2 11.86 45
50 94.8 14.15 50 55 95.5 17.54 55 60 96.0 20.93 60 65 96.5 25.94 65 70 97.0 30.95 70 75 97.5 38.36 75 80 98.0 45.77 80 85 98.5 55.66 85 90 99.0 67.68 90 95 99.5 82.31 95 100 100.0 100.0 100
NOTE: Custom characterization points can only be entered with the FB configurator.
100
90
80
70
60
50
40
CMD_USED (% FS)
30
20
10
0
0 20 40 60 80 100
Quick Open
Equal Percent
Linear
FINAL_VALUE (% FS)
Figure 10.3 Logix 3400MD Digital Positioner Characteristic Curves
10.11 Stroke Characterization
In addition to three pre-defined and embedded characterization curves, the Logix 3400MD positioner has a 21-point custom stroke characterization feature. This allows the user to define a unique set of operating parameters customizable to his process conditions.
Table 10.15 Transducer Block Characterization Parameters
Parameter Description Value — Meaning Comments
MODE_BLK The operating mode of the
transducer block
CONTROL_FLAGS Byte values which select posi-
tioner operation features
CURVEX Numeric X value array for cus-
tom point. (1x21 array points)
CURVEY Numeric Y value array for cus-
tom point. (1x21 array points)
94
Permitted Modes: Auto - Auto (tar­get mode) OOS - Out of Service 1 Quick Opening Curve* Loads factory defined QO curve as custom curve.
2 Equal Percent Curve Loads factory defined equal percent curve as custom
4 Positioner Model 5 Actuator Style 6 Custom Characterization Active Activates custom curve. If Off, response is Linear. 8 Air Action X-axis value for custom stroke char­acterization point. Range -10 to 110
Y-axis value for custom stroke char­acterization point. Range -10 to 110
The transducer block must be out-of-service before the user can edit or change characterization.
curve.
Pair each X-value with corresponding Y-value to define the desired point. Values must be in ascending (or equal) order.
Page 95
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
* Must not be selected if a custom curve is to be created or edited.
10.12 Characterization Procedure
The following procedure outlines the basic way setting up a custom stroke characterization takes place.
Steps:
1. Verify the process is in a safe condition and that the valve may be taken out of service.
2. Put the Transducer block MODE_BLK OOS
3. Make sure that “Custom’ is selected in CURVE_SELECT.
4. Enter the values for CURVEX and CURVEY to define the desired response. Care must be taken to assure that each CURVEX value has the correct corre-
sponding CURVEY value. The user may choose any number in the range to define the curve. The 21 CURVEX points do not need to be evenly spaced, if so desired. However, the CURVEX values must be in ascending (or equal) order. The CURVEY points may be any value in the range, ascending or descending. The response is a linear interpolation, or straight-line, response between points. All 21-points must be defined. (i.e. If only 5 point sets were needed to define the desired operation, the remaining 16 points would need to be set to 110.).
5. Write the changes to the Logix 3400MD digital positioner.
6. Verify the proper operation of the stroke response by incrementally writing values to FINAL_ VALUE. (The Resource Block must also be OOS first.) CMD_USED, FINAL_POSITION_VALUE, and the valve response should track the desired curve.
7. Return the valve to service by returning both MODE_BLKs back to Auto.
Characterization Retention
Once a custom curve has been loaded into the Logix 3400MD digital positioner’s memory it is retained in the EPROM until it is either edited or replaced. Turning ‘Custom Characterization Active’ on or off now selects between a linear response (Off), or the new custom curve (On). If either of the other two factory curves is selected it will overwrite the custom curve in RAM, only. The custom curve will automatically be activated again when the factory curve is deselected.
10.13 Initiating a Valve Signature
A feature of the Logix 3400MD positioner is the ability to capture and store a valve diagnostic signature in the positioner’s volatile RAM. A signature is the collected data response of the valve to a pre-defined set of operating conditions. This stored data can later be uploaded to the host system for analysis of potential problems. By comparing a baseline signature, when the valve is new, to subsequent signatures at later times, a rate of change can be tracked which can help predict possible faults in the valve before they happen. This is called ‘predictive maintenance’. It is important to note that the purpose of the positioner is to act as the data acquisition device for the signature. Analysis of the data is not done on the device, but in the supervisory system.
System Preparation
CAUTION: By definition, the collection of the signature requires the unmanaged operation of the positioner. Therefore, the process must be in a safe operating mode where unexpected move ment of the valve will not cause a hazardous condition. Before a valve signature can be run, the Transducer
Block must be out of service (OOS).
95
Page 96
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
Table 10.16 Transducer Block Signature Parameters
Parameter Description Value-Meaning Comments
MODE_BLK
The operating mode of the Transducer block
Permitted Modes: Auto-Auto (target mode) OOS-Out of Service
The transducer block must be in the OOS mode to perform a Signature
SIG_START
SIG_STOP Ending position point for signature.
RAMP_RATE
SIG_HOLD
SIG_FLAGS
Beginning position point for signature to start.
Desired time for ramp signature in seconds.. Minimum value is 1
Time in seconds after step or ramp that the the system will log data.
Byte value which select Which signature options Are used
Value is in percent and should be set in the range of -10% to 110%.
Value is in percent and should be set in the range of -10% to 110%.
0x01 RUN/BEGIN_SIG
0x02 SIG_COMPLETE
0x04 TEST REPEAT MODE
0x08 RUN RAMP
0x10 VALVE_
0x20 END OF DAT
0x40 TEST DAC MODE
0x80 RUN PST
RAMP_RATE is only used in the ramp signature. This is ignored in step signatures.
Select to initiate the signature
Status set when signature is complete
Select to run a ramp signature otherwise it defaults to a step signiature.
Initializes valve for signature capture (read only
End of signiature data encountered when uploading.
Select for special DAC mode
Run Partial Stroke Test (PST)
96
SIG_INDEX
SIG_DATAn
Pointer used for data transfer
Arrays to hold the signature data after transfer from controller board.
Write the desired packet value.
Writing any value to SIG_INDEX will initiate a sig data transfer and will populate the SIG_DATAn parameters in the XDTB_ TECH block.
The DIG_DATAn parameters are populated with the latest signature data when a write to the SIG_INDEX parameter is done.
Page 97
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
10.14 Signature Procedure
The following steps are an example of how to initiate a ramp signature capture.
1. Make sure the process is in a safe condition and notify the control room that the valve will temporarily be taken off-line.
2. Verify preparedness to proceed.
3. Put the Transducer block MODE_BLK OOS.
4. Set SIG_START to desired value.
5. Set SIG_STOP to desired value.
6. Set SIG_RATE to desired value.
7. Set SIG_HOLD to desired value.
8. In SIG_FLAGS select: RUN/BEGIN, RUN RAMP.
9. Write values to the Logix 3400MD digital positioner.
10. The valve will stroke to the beginning position, as defined by SIG_START ,and will begin ramping to the desired ending position, as defined
by SIG_STOP. Notice that SIG_COUNTER will incre ment while this takes place
11. SIG_FLAGS indicates SIG COMPLETE.
12. Notify control room the valve is back on-line. The stored signature will remain in the Logix 3400MD digital positioner NON volatile RAM
until the either the unit is reset, or another signature is taken which overwrites the previous one.
13. Return the MODE_BLK to Auto
97
Page 98
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
STEP SIGNATURE
If a step signature was desired, simply do not select STEP_RAMP in SIG_FLAGS, and then set the STEP_TIME prior to selecting BEGIN_SIG.
Collection of Stored Signature
The collection of the stored signature is accomplished by the host system. It is not part of the device. See host system programming.
A simple utility using National Instruments NIFBUS is available from Flowserve for retrieving a signature file. This file is stored in a text format that can be imported into other programs for plotting and analysis.
Contact Flowserve for more details.
Retrieve a Signature
After a signature has been run the data is stored on the Logix 3400MD device. Because of the amount of data in a signature it has to be retrieved from the device. To retrieve this data it is recommended that you use the valvesight DTM. However you can also retrieve the raw data view it in the parameters XDTB_TECH.SIG_DATA1 – SIG_DATA26. To retrieve this data using the parameters you can simply write a non zero value to the parameter XDTB_MAIN.SIG_INDEX. When you do this you will see this parameter start changing and the signature data can then be viewed in the signature parameters. This procedure may take the device several minutes to complete.
The data will be formatted in following order:
Command Position Spool Command Hall Position in Percent Port 1 Pressure in Percent Port 2 Pressure in Percent Future Use
10.15 Logix 3400MD Function Block Execution Times
XDTB_TECH_BLOCK 20 mS
98
Page 99
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
XDTB_MAIN_BLOCK 20 mS XDTB_MD_BLOCK 20 mS PID 90 mS DI_LO 20 ms DI_HI 20 mS ANALOG_OUT 30 mS DISCRETE_OUT 30 mS OUTPUT_SPLITTER 50 mS iNPUT _SELECTOR 50 mS
10.16 Logix 3400MD Diagnostic Parameters Enabled with TEST_MODE
The following Logix 3400MD parameters are only populated with valid data when the ENABLE_DIAGNOSTIC bit in the parameter TEST_ MODE has been selected:
LX_XDTB_TECH_DEVIATION_EFFORT LX_XDTB_TECH_PRESS_CTRL_EFFORT LX_XDTB_TECH_INTEGRAL_EFFORT LX_XDTB_TECH_SPOOL_COMMAND LX_XDTB_TECH_BACKOFF_EFFORT LX_XDTB_TECH_SPOOL_POSITION LX_XDTB_TECH_SPOOL_EFFORT LX_XDTB_TECH_PIEZO_OFFSET LX_XDTB_TECH_PIEZO_COMMAND LX_XDTB_TECH_P_GAIN_EFFECTIVE LX_XDTB_TECH_P_GAIN_MULT LX_XDTB_TECH_D_GAIN_EFFECTIVE LX_XDTB_TECH_D_GAIN_FILTER LX_XDTB_TECH_PRESS_CTRL_GAIN_EFFECTIVE LX_XDTB_TECH_PRESS_CTRL_GAIN_MULT LX_XDTB_TECH_PRESS_CTRL_SP LX_XDTB_TECH_FINAL_VALUE_CUTTOFF_HYSTERESIS LX_XDTB_TECH_STROKE_TIME_CAL LX_XDTB_TECH_STROKE_TIME_DOWN LX_XDTB_TECH_STROKE_TIME_UP LX_XDTB_TECH_HALL_DOWN LX_XDTB_TECH_HALL_UP LX_XDTB_TECH_FB_AD_COUNT LX_XDTB_TECH_HALL_RANGE LX_XDTB_TECH_HALL_AD_COUNT LX_XDTB_TECH_HALL_NULL LX_XDTB_TECH_PIEZO_COUNTER LX_XDTB_TECH_PIEZO_INTERVAL LX_XDTB_TECH_HALL_TGT LX_XDTB_TECH_FB_VOLTS LX_XDTB_TECH_HALL_VOLTS LX_XDTB_TECH_PIEZO_VOLTS LX_XDTB_TECH_REF_VOLTS LX_XDTB_TECH_FB_POSITION_FILTER LX_XDTB_TECH_LOAD_EE_DEFAULTS
99
Page 100
Logix 3400MD Digital Positioner LGENIM3405-02 11/13
10.17 Logix 3400MD Fault States
The following procedure describes hot to setup the fault states in the Logix 3400MD:
• In the Resource block verify the Faultstate is checked in the FEATURE_SEL parameter
• In the AO block make sure the SHED_OPT parameter is initialized correctly for your system. (NormalShed_NormalReturn is most common)
To Fail In Place
• In the AO block verify the Fault State to Value is NOT checked in the OP_OPTS parameter.
To Fail Closed / Open / or to a designated value
• In the AO block verify the Fault State to Value is checked in the OP_OPTS parameter.
• In the AO block set the FSTATE_VAL parameter to the position you wish to fail to between 0 and 100. (0 for closed or 100 for open or anything in between)
In the AO block set the FSTATE_TIME parameter. This parameter will delay the fault state action by the amount of time indicated. The default for this is 0 (zero) seconds or no delay. Some will recommend this value be set to something other than zero to ac count for momentary faults that recover itself.
To Test the fault state is set correct
• In the Resource Block set the SET_FSTATE parameter to SET. The device should move to the desired fault state.
• When the test is complete in the Resource Block set the CLR_FSTATE parameter to CLEAR. The device should start functioning properly at this point.
10.18 Logix 3400MD Digital Ouput (DO) Operation
The DO block is designed to be able to set the position to a predetermined position based on the OUT_d parameter of the DO block. To implement, schedule the DO block to run and set the DO OUT_d parameter to the desired value based on the following table.
! Note: this will only work when the block is in AUTO mode.
A value of 16 in the DO OUT_d parameter will disable the DO and revert control back to the AO block.
Table 10.17 DO OUT_d Table
OUT_D_VALUE Position
00 0% 01 100% 02 50% 03 7.0% 04 14% 05 21% 06 28% 07 35% 08 42% 09 49% 10 56% 11 63% 12 70% 13 77% 14 84$ 15 91%
100
16 Diables DO
Loading...
Buy Points How it Works FAQ Contact Us Questions and Suggestions Privacy Policy Cookie Policy Terms of Use