Flowserve 400MD User Manual

USER INSTRUCTIONS

Logix 3400MD
Digital Positioner

FCD LGENIM3405-02 11/13

Installation &

Reference Guide

Logix 3400MD Digital Positioner LGENIM3405-02 11/13

Contents

Introduction 5
1 Logix 3400MD Digital Positioner Description 10

1.1 Introduction 10

1.2 Fieldbus Logix 3400MD Digital Positioner 10

1.3 Fieldbus Overview 12

2 Installation Overview 13

2.1 Introduction 13

2.2 Installation Components 13

2.3 Installation / Operation Tasks 14

3 Bench Configuration (Optional) 15

3.1 Introduction 15

3.2 Bench Check 15

4 Pre-installation Considerations 16

4.1 Introduction 16

4.2 Considerations for Logix 3400MD Digital Positioner 17

5 Logix 3400MD Digital Positioner Installation 18

5.1 Introduction 18

5.2 Mounting Variations 18

5.3 Wiring Logix 3400MD Digital Positioner 20

6 Logix 3400MD Digital Positioner Configuration 23

6.1 Introduction 23

6.2 Logix 3400MD Digital Positioner Communications 24

6.4 Device Configuration 24

6.6 Simulation Dip Switch 27

6.7 Establishing Communications 27

6.8 Making Initial Checks 28

7 Operation 29

7.1 Introduction 29

7.2 Operation Tasks 29

8 Configuration Description 29

8.1 Introduction 29

8.2 Function Block Application Process 29

8.3 Block Description 30

8.4 Resource Block 32

8.5 Main Transducer Block 34

8.6 Tech Transducer Block 39

8.7 MD Transducer Block 42

8.8 Analog Output Function Block 44

8.9 Digital Output Function Block 47

8.10 Digital Input Function Block 48

8.11 Input Selector Function Block 48

8.12 Output Splitter Function Block 49

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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

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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

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

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.

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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.

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• 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.

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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

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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)

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• 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.

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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.

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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.

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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.

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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.

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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

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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

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Figure 5.1 Typical Linear Actuator-mounted Installation

Figure 5.2 Rotary Transfer Case Mounting

Figure 5.3 Rotary Valve with Four-bar Linkage

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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

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.

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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?

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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.

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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.

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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.

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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

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.

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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.

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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

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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.

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