Flowserve MX HART Field Unit User Manual

USER INSTRUCTIONS

MX/QX HART Field Unit

FCD LMENIM2340-00 – 1/14

Installation

Operation

Maintenance

Experience In Motion

MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

Contents

1 Introduction 6

1.1 Purpose 6

1.2 How to Use This Manual 6

1.3 User Safety 7

1.4 User Knowledge 7

1.5 MX/QX HART System Capabilities and Features 7

1.5.1 General Network Specification 8

2 System Components and Installation 9

2.1 Introduction 9

2.2 Hardware 9

2.2.1 MX/QX Electronic Actuators 9

2.2.2 MX/QX HART Interface Board 11

2.2.3 Network Host 11

2.2.4 Network Cable 11

2.2.5 Typical HART Network Configuration 11

2.3 Network Cabling Topologies 12

2.4 Site and Network Cable Preparation 13

2.4.1 Site Preparation 13

2.4.2 Network Cable Preparation 13

2.4.2.1 Network Cable Connection to the MX/QX HART Unit 13

2.5 MX/QX HART Device Installation and Setup 14

2.5.1 MX/QX HART Device Installation 14

2.5.2 MX/QX HART Device Setup 14

2.6 Installation Verification 16

2.6.1 Network Cabling Installation Verification 16

2.6.2 MX/QX HART Device Installation Verification 16

2.7 Configuration Confirmation 17

2.7.1 Checking Connections 17

2.7.2 View Settings 17

2.7.3 Checking the Normal Display 18

2.8 MX/QX HART Device Description and Device Type Manager Files 18

3 Software 19

3.1 HART Protocol 19

3.2 HART Parameters 19

3.2.1 Analog Input Ratings 19

3.2.2 Field Device Status 20

3.3 Dynamic Variables 20

3.4 Device Variables 20

3.4.1 Supported Device Variables 20

3.4.2 Device Variable Mapping 21

3.4.3 Device Variable Units 21

3.5 Supported HART Commands 22

3.5.1 Universal Commands 22

3.5.1.1 Command 48 Data 24

3.5.2 Common Commands 29

3.5.3 Burst Messages 33

3.5.3.1 Update Periods 33

3.5.3.2 Commands Supported for Burst Message 34

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3.5.3.3 Configuring a Device for Burst Mode Operation 34

3.5.3.4 Burst Message Trigger Mode 35

3.5.3.5 Burst Trigger Mode 35

MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

Contents (Continued)

3.5.4 Event Notification 35

3.5.4.1 Configuring Event Notification 36

3.5.4.2 Handling of Event Notifications 37

3.5.4.3 Update Periods 37

3.6 Device-Specific Commands 37

3.6.1 Remote Configuration Mode 37

3.6.2 Partial Stroke Test 39

3.6.3 Actuator Commands 41

3.7 Calibration 42

3.7.1 Loop Current Trim Procedure 42

3.7.2 Re-range Procedure 45

3.7.3 Analog Signal to Primary Variable Process Flow 47

4 Associated Documents 49
5 How to Order Parts 50
Appendix A – Wiring Diagrams 51
Appendix B – HART Data Formats 52
Appendix C – Enumeration and Bit Field Tables 52-55
Appendix D – Setting Data and Time 56
Appendix E – Command Response Codes 56-67

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Figures

Figure 2.1a – MX-05 Actuator and Figure 2.1b – QX-05 Actuator 10
Figure 2.2 – Typical HART System With a DCS Host 11
Figure 2.3 – Point-to-Point Topology (Host Powered) 12
Figure 2.4 – Point-to-Point Topology (Loop Powered) 12
Figure 2.5 – Multi-drop Topology (Host Powered) 12
Figure 2.6 – Multi-drop Topology (Loop Powered) 13
Figure 2.7 – Connecting Network Cable to MX/QX Terminal Block 14
Figure 2.8 – MX/QX HART Setup Sequence 15
Figure 2.9 – MX/QX HART View Settings Sequence 17
Figure 2.10 – Normal Display 18
Figure 3.1 – Device Variable Mapping Setup 21
Figure 3.2 – Device Variable Units 22
Figure 3.3 – HART Diagnostics Data 28
Figure 3.4 – Burst Messages 34
Figure 3.5 – Trigger Mode 1 “Windowed” 35
Figure 3.6 – Event Notification 36
Figure 3.7 – Event Mask 36
Figure 3.8 – Remote Configuration Mode 37
Figure 3.9 – Analog Signal to Primary Variable Process Flow 48
Figure 5.1 – Device Variable Status Byte Format 53

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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

Tables

Table 2.1a – MX Actuator Components and Table 2.1b – QX Actuator Components 10
Table 3.1 – HART Parameters 19
Table 3.2 – Analog Input Ratings 19
Table 3.3 – Field Device Status 20
Table 3.4 – Supported Dynamic Variables 20
Table 3.5 – Supported Device Variables 20
Table 3.6 – Mapping of Device Variables to Dynamic Variables 21
Table 3.7 – HART Universal Commands 22
Table 3.8 – HART Defined Status Bits 25
Table 3.9 – MX/QX Defined Status Bits 26
Table 3.10 – Common Commands 29
Table 3.11 – Trigger Source for Burst Message Commands 35

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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

Introduction

1

1.1 Purpose

This manual explains how to install and operate the MX/QX HART field unit. Actuators containing the HART field unit
may be connected by a standard instrumentation twisted-pair cable to form a HART communication system network.
The HART network employs a bi-directional communication protocol, operating at 1200 bits/sec, that provides data
access between intelligent actuators and host control/monitoring systems. In addition to a digital signal, the network
simultaneously provides a 4-20 mA analog signal that is proportional to the field unit’s primary measured value. This
system allows a host system such as a distributed control system (DCS) to control and monitor the actuators, including
the acquisition of status and alarm data from each MX/QX.

1.2 How to Use This Manual

Each section provides the MX/QX HART user with information on installing and operating the MX/QX HART field unit.

Section Title Description

1 Introduction

2 System Components

3 Installation and Configuration Provides details for installing and configuring a field unit.

4 Associated Documents

5 How to Order Parts

Appendix A Wiring Diagram Detail wiring connections to the MX/QX field unit.

Appendix B HART Data Formats Listing of HART parameters and descriptions.

Appendix C Enumeration and Bit Field Tables Explains field device bit masking information.

Appendix D Setting Date and Time Defines real-time clock configuration settings.

Appendix E Command Response Codes

Details user safety and knowledge requirements, system
capabilities and features.

Focuses on the description of the HART system hardware
and software components.

Provides a list of documents on related subjects for
additional MX/QX and HART system information.

This section provides part numbers and ordering contact
information.

Listing of response codes for all universal and common
HART commands.

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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

1.3 User Safety

Safety notices in this manual detail precautions the user must take to reduce the risk of personal injury and damage
to the equipment. The user must read and be familiar with these instructions before attempting installation, operation,
or maintenance. Failure to observe these precautions could result in serious bodily injury, damage to the equipment,
warranty void, or operational difficulty. User must follow local and state safety regulations.

Safety notices are presented in this manual in three forms:

c WARNING: Refers to personal safety. Alerts the user to potential danger. Failure to follow warning notices could

result in personal injury or death.

a CAUTION: Directs the user’s attention to general precautions that, if not followed, could result in personal injury

and/or equipment damage.

NOTE: Highlights information critical to the user’s understanding of the operator’s installation and operation.

1.4 User Knowledge

It is recommended that the user read this manual in its entirety before the MX/QX HART equipped actuator is installed
and operated.

The user needs to have a fundamental knowledge of electronics and microprocessor concepts. An understanding of
valve actuators and digital control systems is beneficial to the field unit user. Refer to the Glossary for terms used
throughout this manual.

The following websites have documents on HART and electric actuators: www.hartcomm.org and www.flowserve.com

For HART technology and cabling information, refer to the following documents:

HART Communication Protocol Specification: HCF_SPEC-13
HART Communication FSK Physical Layer Specification: HCF_SPEC-54
HART Communication Command Summary Specification: HCF_SPEC-99
HART Communication Universal Command Specification: HCF_SPEC-127
HART Communication Common Practice Command Specification: HCF_SPEC-151
HART Communication Common Tables: HCF_SPEC-183

1.5 MX/QX HART System Capabilities and Features

Limitorque’s HART field unit conforms to the HART Communication Protocol Specification (Document HCF_SPEC-

13). The device is suitable for use on point-to-point and multi-drop network topologies. The communication system
theoretically supports up to 26 actuators connected in a multi-drop network.

The MX/QX HART field unit fits in the actuator in the sealed electrical housing. Adjustments to the MX/QX HART
settings must be made from the configuration SETUP menu.

The MX/QX HART field unit may command its actuator to:

Open
Stop
Close
Move to a set position
Perform an emergency shutdown operation
Read and control relays
Perform partial stroke test
Monitor analog inputs and position
Monitor modes and alarms

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Commands to the unit come over the network from the host system, which may be:

• Personal Computer (PC)

• Distributed Control System (DCS)

• Programmable Logic Controller (PLC)

• Field Device Tool (FDT) w/Device Type Manager (DTM)

• Some other microprocessor-based device

A HART field device is an intelligent device within the actuator that can send multiple digital device variables to the
control system over a 4-20 mADC analog signal loop. The device provides control and self-test capabilities, which allow
abnormal conditions to be easily and immediately identified before an unplanned shutdown occurs.

Additional features and capabilities are:

• The system reduces the cost of wiring and installation – existing wiring and multi-drop connections can be used.

• The devices are interoperable – devices from different suppliers can communicate with one another on the same

network.

1.5.1 General Network Specification

System Specifications:

Communications using the HART Communication Foundation Protocol

Network Specificationss:

• Point-to-point and multi-drop topologies

• Master/slave communication

• Simultaneous 1200 bps digital communication without 4-20 mADC signal interruption

• Up to two masters per network (primary and secondary)

• Burst mode for continuous message broadcasting

MX/QX HART Unit Specification:

The field unit mounts in the actuator and is software-controlled in order to allow functionality of:

• Dynamic Variables PV, SV, QV and TV

• Device Variables: Position Setpoint, Measured Position, Torque, Motor Temperature and Compartment Temperature

• Network Communication

• Device-Specific Commands

System Host Specifications:

The HART master is the network system host, and can be a personal computer (PC), distributed control system (DCS),
programmable logic controller (PLC), or another microprocessor-based device. The HART protocol allows for up to
two masters (primary and secondary) per network loop. Secondary masters, such as handheld communicators, can be
used without interrupting communications between the primary master and field devices.

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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

System Components

2

and Installation

2.1 Introduction

This section is an overview of the components used in the HART system and their installation. The MX/QX HART unit is
installed in the MX or QX actuator, as shown in Figures 2.1 and 2.2. The network cable connects to the HART unit at the
actuator terminal block. The network cable connects to the distributed control system, which usually acts as the host.

2.2 Hardware

2.2.1 MX/QX Electronic Actuators

The MX/QX actuators control the opening and closing of valves. The MX is a multi-turn valve, while the QX is a quarter­turn valve actuator. Both actuators are designed for operation of ON-OFF and modulating valve applications.

The MX/QX features include the following:

• Non-intrusive setup

• Separately sealed terminal compartment

• Patented absolute encoder for valve position sensing (no battery required)

• Graphical LCD for indication and calibration

• Sophisticated electronic control, monitoring, and diagnostic capabilities with patented LimiGard™ technology

NOTE: Recommended storage procedures for the MX are detailed in Bulletin LMENIM2306, MX Maintenance and
Spare Parts Manual. QX procedures are detailed in Bulletin LMENIM3306, QX Maintenance and Spare Parts Manual.
Failure to comply with recommended procedures will void the warranty. For longer-term storage, contact Limitorque for
procedure and recommendations.

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Figure 2.1a – MX-05 Actuator Figure 2.1b – QX-05 Actuator

1

10

3

11

13

5

12

2

9
OPTIONAL

15

1

9

7

4

9

3

14

8

6

3

3

11

10

9

12

4

8

7

2

2

5

6

10

Table 2.1a – MX Actuator Components Table 2.1b – QX Actuator Components

Item Description Item Description

1 Handwheel 1 Handwheel
2 Declutch lever 2 Declutch lever (QX-05)
3 Oil fills (dotted arrow depicts fill on declutch side) 3 Oil fill
4 Controls compartment (field unit location) 4 Controls cover
5 LCD display 5 LCD display
6 Control knobs 6 Control knob
7 Ground lug 7 Ground lug
8 Thrust/torque base 8 Baseplate

9 Conduit entries 9 Conduit entry
10 Terminal compartment 10 Terminal compartment
11 Electric motor 11 Motor
12 Nameplate 12 Certification nameplate

13 Tag nameplate
14 Oil plug
15 Stem nut stops

MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

2.2.2 MX/QX HART Interface Board

The MX/QX HART field unit interface board is installed in the actuator controls compartment (Figures 2.1 & 2.2 and
Tables 2.1 & 2.2). This unit permits the actuator to be controlled by a DCS or other network host over the HART
network.

The following commands and feedback information are transmitted through this unit:

• OPEN, CLOSE and STOP commands

• ESD (Emergency Shutdown) commands

• Partial Stroke Test commands

• Unit output torque (0-100% rating)

• Go-to-position commands

• Actuator status, alarm and diagnostic messages

• User analog input feedback

2.2.3 Network Host

The HART network is a master/slave communication protocol. Communication to each slave (MX/QX field device) is
initiated by a master (system host device). Two masters can connect to each HART loop. Normally, the primary master
is a DCS, PLC, or PC. If desired, a handheld communicator or PC can serve as the secondary master.

2.2.4 Network Cable

Network cabling should be in accordance with the HART Communication Foundation guidelines. In general, wiring for
HART devices is the same as for conventional 4-20 mA instrumentation. It is recommended to use individually shielded
twisted pair cable. The minimum conductor size is 0.51mm diameter (#24 AWG) for cable runs less than 1500 meters
(5000 ft.), and 0.81mm diameter (#20 AWG) for distances up to the 3000 meter (10 000 ft.) theoretical limit for HART
communication. Please note that the electrical characteristics of the cable, especially capacitance, and the number of
network field devices can affect the maximum allowable cable length.

To prevent signal loop interference, tie all cable shields together and ground at only one point.

2.2.5 Typical HART Network Configuration

A typical MX/QX HART system is shown below:

Figure 2.2 – Typical HART System With a DCS Host

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2.3 Network Cabling Topologies

There are two main topologies for MX/QX HART networks:

Point-to-point One field device connected to the bus (network)

Figure 2.3 – Point-to-Point Topology (Host Powered)

Figure 2.4 – Point-to-Point Topology (Loop Powered)

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Multi-drop Multiple field devices connected to the bus (network)

Figure 2.5 – Multi-drop Topology (Host Powered)

Figure 2.6 – Multi-drop Topology (Loop Powered)

2.4 Site and Network Cable Preparation

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2.4.1 Site Preparation

Prepare the site and associated equipment for operation of the MX/QX HART actuators as follows:

1. Prepare a detailed site plan consisting of the following:

• Actuator locations and tag numbers

• Junction boxes, terminal strip locations and tag numbers

• Power supplies/conditioners

• Provide free access to the MX/QX control panel and terminal block for setup, configuration and troubleshooting.

2. Prepare the cable and label all wires.

3. Install power and control wires in separate conduits.

4. Install and verify earth grounds. The cable shields should be tied together and grounded at only one point. The
single ground point is typically located at or near the system host device.

2.4.2 Network Cable Preparation

Care must be taken during cable preparation:

• When stripping the insulation, use wire strippers that do not nick the wire.

• Use crimp ferrules to prevent stranded wires from getting loose and shorting to other wires.

• Use vibration-resistant wiring terminals that hold the ferrule securely.

2.4.2.1 Network Cable Connection to the MX/QX HART Unit

The field device is connected to the network through the MX/QX terminal block. The network cable is connected to the
terminal block shown in Figure 2.7.

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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

Figure 2.7 – Connecting Network Cable to MX/QX Terminal Block

Shielded Wire Pair

HART

Interface

Field

Device

Field

Device

Connect Shield
to Ground at one
place only

Field

Device

Connect the network cables to the MX/QX terminal block as shown in Figures 2.3 – 2.6. Refer to Appendix A for unit
wiring diagram.

Connect the cable shields to each other inside the unit. Do not connect them to the unit in any way. The network shield
should be grounded at only one place in the network. If it is desired to ground the entire network shield at the actuator,
then install a jumper cable from terminal 3 to earth ground or ground lug.

NOTE: The MX/QX HART device is sensitive to polarity. The cables should be labeled to indicate polarity, and polarity
should be maintained through all connection points.

2.5 MX/QX HART Device Installation and Setup

2.5.1 MX/QX HART Device Installation

The MX/QX HART field unit is located in the controls compartment. It has four standoffs and mounts on top of the
main processor board. Multiple Input/Output (I/O) option boards may also be present. If present, the I/O board will be
on top of the MX/QX HART unit. For installation instructions, refer to the MX Maintenance and Spare Parts Manual,
LMENIM2314 or the QX Maintenance and Spare Parts Manual, LMENIM3314.

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2.5.2 MX/QX HART Device Setup

The MX/QX HART option enables the actuator to be controlled by a HART communications signal. If the option has
been purchased, it is automatically enabled.

NOTE: If the HART option has not been purchased, the screens for changing HART will not be available. To add the
HART option, please consult Limitorque service at [phone].

Figure 2.8 illustrates the setup sequence. For proper operation, the correct mode must be selected.

To set up the MX or QX HART device, enter the Setup mode as detailed in Installation and Operation Manual Bulletins
LMENIM2306 for the MX and LMENIM3306 for the QX;

Figure 2.8 – MX/QX HART Setup Sequence

ESD ACTION

(IGNORE)-OK?

(CLOSE)- OK?

(STOP)- OK?
(OPEN)- OK?

(POSITION)- OK?

CHANGE

HART

STATUS

(ON)-OK?

(OFF)-OK? (ENABLED)-OK?

MOVE TO

XXX% OPEN

MULTI-DROP

(DISABLED)-OK?

If Hart Actuator
& not Multidrop

FAIL POSITION
(CLOSED)-OK?

If fail position is

“position”

If fail position is

not “position”

(OPEN)- OK?
(STOP)- OK?

(POSITION)- OK?

XXX%-OPEN

MOVE TO

If Hart Actuator

& Multidrop

MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

POLLING ADDRESS

(0)-OK?

Address default is zero

Range is 0-63

SAVE

SETTINGS-OK?

CHANGE PROP/

DEADBAND?

YES

NO

PROP BAND

(5%)-OK?

DEADBAND

(2%)-OK?

NOTE: This menu is displayed after the actuator and HART board have been powered up together at least one time.

1. Proceed through Setup to the CHANGE HART? display. Select YES to get to the STATUS display.

2. STATUS enables the user to change from the default condition to turn on and off the network control capability of
the actuator. Select NO to change the setting or YES to get to the next display. (Default = ON)

3. MULTI-DROP (ENABLED) or (DISABLED) allows the user to select the desired network topology. To change the
setting, select NO until the required option is displayed. Select YES if the setting is correct to go to the next display.

NOTE: Changing the topology also requires that the network be wired correctly for the selected topology.

NOTE: If MULTI-DROP ENABLED was chosen, skip to step 5. Otherwise, FAIL POSITION display is shown. In multi-drop

mode the input is digital only (write PV over network), so there is no analog fail action.

4. FAIL POSITION allows the user to configure the action desired upon loss of the analog input signal. The selections
are CLOSE, OPEN, STOP and POSITION. Select the desired setting and proceed to the next display.

NOTE: If POSITION is chosen as the action, a MOVE TO display will be shown where the user can select the desired
position between 0 and 100% open, in one percent increments, by selecting NO until the desired position is selected.
Select YES once the setting is correct to go to the next display.

5. POLLING ADDRESS allows the user to set the HART polling address of the unit. Point-to-Point units are typically
set to address 0, and Multi-drop units are typically set from 1-63. HART 5 masters will always set Point-to-Point
units to address 0.

6. SAVE SETTINGS allows the user to save the settings and make them active. This can result in a change in the
hardware configuration on the HART board to support the change in configuration. Select NO to return to STATUS
(step 2) and change settings. Select YES to save the HART configuration settings and go to additional network
settings.

NOTE: The configuration set in steps 1-6 will not be saved if the user does not select YES for SAVE SETTINGS.

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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

7. CHANGE PROP/DEADBAND allows for the setting of proportional band and deadband. Proportional band is the
range of errors between the position and demand signal that will produce reduced speed (pulsing). The default
value is 5%. To change from default, select NO until the required value is displayed. The value is adjustable between
1% and 100%, in 1% increments. The default deadband value is 2%. For error signals less than this, no motion
occurs. The deadband should be wide enough to prevent “hunting” of the actuator but as low as possible to give
adequate response to changes in the error signal. To change from the default, select NO to adjust the value between
1% and 50%, in 1% increments to suit the application.

8. ESD ACTION allows a network ESD function to be enabled after the ESD configuration has been established for the
unit. This network ESD can be selected to do one of the following: ignore the command (NONE), CLOSE, OPEN,
STOP or POSITION the actuator. To change from the default setting, select NO until the required option is displayed.
Select YES if the setting is correct to go to the next display.

NOTE: If POSITION is chosen as the action, a MOVE TO display will be shown where the user can select the desired
position between 0 and 100% open, in one percent increments, by selecting NO until the desired position is selected.
Select YES once the setting is correct to go to the next display.

.2.6 Installation Verification

2.6.1 Network Cabling Installation Verification

After installation is complete and prior to operation, inspect the network cable and its connection to each field device.
NOTE: Units should be disconnected from power. The network should be disconnected from the host device.
Check for the following:

1. There should not be:

• Nicks in the insulation - this can cause a short to the grounded shield.

• Cut strands in a stranded conductor - this can cause a poor connection and eventually an open circuit.

2. The shield/drain wire should only be grounded at one point in the segment to avoid ground loop problems.

3. The ground/earth connection should be at true ground potential and effective at all times. See step No. 5 in Section

2.4.1, Site Preparation.

2.6.2 MX/QX HART Device Installation Verification

Verify the field device is installed as follows:

1. Enter the Setup mode as detailed in Installation and Operation Manual Bulletins LMENIM2306 for the MX or
LMENIM3306 for the QX.

2. In the Setup mode, use the black control knob to select YES to the main menu selection. VIEW DIAGNOSTICS?

3. Select YES to the display VIEW HARDWARE STATUS?

4. Select YES to scroll through the menu selections. The LCD will read HART BOARD 1 (OK) - NEXT? if installed.

NOTE: If the HART BOARD 1 (OK)? does not appear, contact Limitorque for assistance.

5. To return to the normal display, use the black knob to select either LOCAL or REMOTE.

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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

2.7 Configuration Confirmation

Field device operation cannot be verified until the complete HART system is operational. However, routine checks can
be performed to verify many functions.

2.7.1 Checking Connections

Verify that all connections, including data wires, shield ground, digital inputs (optional), digital outputs (optional), and
analog inputs are in accordance with MX/QX wiring diagrams and MX/QX HART device diagrams in Appendix A.

2.7.2 View Settings

Refer to Installation and Operation Manual Bulletins LMENIM2306 for the MX and LMENIM3306 for the QX to access
the view settings menu. Verify the settings as follows:

1. From the VIEW SETTINGS display, scan to the VIEW HART? display

2. From VIEW HART? display, select YES and check that the HART status is ON. This confirms that HART is enabled.

3. From HART STATUS display, select YES to go to next display, which is DEVICE ID. This is the Unique Device ID of
the HART device.

4. If the MX/QX contacts are to be controlled via the network to control external equipment, from the VIEW HART?
display, select NO and obtain the VIEW STATUS AND ALARM CONTROL? display. Verify that the digital outputs,
S1a, S1b, S2a, S2b are set for “Network” controlled.

Figure 2.9 – MX/QX HART View Settings Sequence

VIEW

HART?

STATUS

(ON)-OK?

DEVICE ID

3295509-OK?

If Hart Actuator
& not Multidrop

FAIL POSITION

(CLOSE)-OK?

If fail position is

“position”

HART-1 FIRMWARE

REV 25-OK?

MOVE TO

XXX% OPEN

If Hart Actuator

& Multidrop

If fail position is

not “position”

HART-1 HARDWARE

REV 25-OK?

POLLING ADDRESS

(0)-OK?

MULTI-DROP

(DISABLED)-OK?

PROP BAND

(5%)-OK?

DEADBAND

(2%)-OK?

ESD ACTION

(IGNORE)-OK?

MOVE TO

XXX% OPEN

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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

2.7.3 Checking the Normal Display

Place the selector switch in LOCAL or REMOTE position. The valve position will be indicated at the top of the LCD.
STATUS OK or HARDWARE FAILURE should be indicated at the bottom of the LCD display.

• If STATUS OK is displayed, then the HART board hardware is OK.

• If HARDWARE FAILURE and HART-1 FAILED or HART-1 NOT PRESENT is displayed, no communication is occurring.

This could be due to a number of factors. Check all local connections and configurations. If these are correct and the
HARDWARE FAILURE is still displayed, then the solution to this problem must await full system commissioning.

Figure 2.10 – Normal Display

Remot e

or

Local

100% OPEN

STATUS OK

2.8 MX/QX HART Device Description and Device
Type Manager Files

In the Host system, the configuration device can use Device Description (DD) files to configure a HART system without
having the devices online. Please refer to your host system documentation for the files that are needed. The Device
Type Manager (DTM) file provides an interface between the actuator’s specific application software and a Network
Host Station’s Field Device Tool (FDT) frame. The DTM can be integrated into FDT frame applications to allow users
to perform offline and online parameterization, configuration, and status and diagnostic retrieval. The DD files are
downloaded from the HART Communication Foundation website (www.hcfcomm.org) into the DCS workstation or
host device.

In addition, the DD and DTM files can be downloaded from the Flowserve Limitorque website: www.flowserve.com

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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

Software

3

3.1 HART Protocol

The system uses the HART protocol to communicate over the HART network with other HART devices. The HART
protocol is a master/slave communication service for process control devices. HART digital signaling is an extension of
conventional analog signaling allowing the network signal to ride on the 4-20 mADC analog process signal. It uses
1200 bps binary phase-continuous Frequency-Shift-Keying (FSK), where a high frequency current is superimposed on
a low-frequency (typically 4-20 mADC) analog current.

3.2 HART Parameters

Table 3.1 – HART Parameters

Parameter Value

HART Version 7.3
Expanded Device Type = Manufactuer ID + Device Type 0x3008
Physical Layer Supported FSK
Physical Device Catagory Actuator
Maximum Number of Burst Messages 3
Maximum Number of Event Messages 1
Size of the Event Queue 6
Maximum Number of Trends 2
Size of the Trend Buffer 12
Default Number of Preambles1 5

3.2.1 Analog Input Ratings

Table 3.2 – Analog Input Ratings

Maximum current2 30.0 mA
Maximum voltage 50 V

Current over-range

(Primary Variable Out of Limits)

Multi-drop current draw Approximately 2 mA

1. Field Device must have minimum 5 preambles, and maximum 20 preambles.

2. The analog input is automatically bypassed, if the maximum loop current is reached. The field device will continue to check the circuit for overload on a periodic basis,
and will restore the connection if the overload clears.

Analog Input > 21 mA
Analog Input < 3 mA

(HART communication may fail, if Analog Input <2 mA.)

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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

3.2.2 Field Device Status

The Field Device Status is contained in the second data byte in a Slave-to-Master frame as a bit field table. It indicates
the current operating status of the field device as a whole and is not associated with the completion of any command.

Table 3.3 – Field Device Status

Bit Mask Description

0x01 Primary Variable Out of Limits – The PV is beyond its operating limit.
0x02 Non-Primary Variable Out of Limits – A device variable not mapped to PV is beyond its operating limits.

0x04

0x08 Loop Current Fixed – The loop current is being held at a fixed value and is not responding to process variations.
0x10 More Status Available – More status information is available via Command 48, Read Additional Status Information.
0x20 Cold Start – A power failure or Device Reset has occurred.
0x40 Configuration Changed – An operation was performed that changed the device’s configuration.
0x80 Device Malfunction – The device detected a serious error or a failure that compromises device operation.

Loop Current Saturated – The loop current has reached its upper (or lower) endpoint limit and cannot increase (or
decrease) any further.

3.3 Dynamic Variables

The Limitorque HART actuator device supports the following Dynamic Variables:

Table 3.4 – Supported Dynamic Variables

Variable Code Variable Direction Physical Interface

0 PV (Primary Variable) input Analog current input – Analog Channel 0
1 SV (Secondary Variable) output None
2 TV (Tertiary Variable) output None
4 QV (Quaternary Variable) output None

3.4 Device Variables

3.4.1 Supported Device Variables

The Limitorque HART actuator device supports the following Device Variables:

Table 3.5 – Supported Device Variables

Variable

Code

Variable Direction Unit Code

0 Position setpoint input % (57) Not Classified (0) Valve/Actuator (6) 0-100
1 Current position output % (57) Not Classified (0) Not Used (250) 0-100
2 Torque output % (57) Not Classified (0) Not Used (250) 0-100
3 Motor temperature output °C (32), °F (33) Temperature (64) Not Used (250) Not Limited

Compartment

4

temperature

output °C (32), °F (33) Temperature (64) Not Used (250) Not Limited

Device Variable
Classification

Device Variable
Family

Range

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MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

3.4.2 Device Variable Mapping

Device Variables may be mapped to the Dynamic Variables according to the following table:

Table 3.6 – Mapping of Device Variables to Dynamic Variables

Variable

Code

0 PV input Position Setpoint Position Setpoint
1 SV output Current Position Current Position or Torque

2 TV output Motor Temperature

3 QV output Compartment Temperature

No single Device Variable may be mapped to more than one Dynamic Variable.

For Example:

Valid Mapping: Invalid Mapping:

PV = DV0 PV = DV0
SV = DV1 SV = DV1
TV = DV3 TV = DV1
QV = DV4 QV = DV4

Dynamic
Variable

Direction Default Device Variable

Device Variables which may be mapped to the
Dynamic Variable

Current Position, Torque, Motor Temperature or
Compartment temperature

Current Position, Torque, Motor Temperature or
Compartment temperature

If you try to map two Dynamic Variables to the same Device Variable, the command will return response code 2 “invalid
selection”. The Device Variables may be mapped from the DD menu Device Setup->Wired HART Board->Configuration->
Device Variable Mapping as follows:

Figure 3.1 – Device Variable Mapping Setup

3.4.3 Device Variable Units

Device Variables 0, 1, and 2 have fixed units that may not be changed. Device Variables 3 and 4 have units that may be
interchanged between °C and °F the default is °F. For Device Variables 3 and 4, the units may be changed from the DD menu
Process Variables->Wired HART Board as follows:

flowserve.com

21

MX/QX HART Field Unit FCD LMENIM2340-00 – 1/14

Figure 3.2 – Device Variable Units

3.5 Supported HART Commands

The following Universal and Common HART commands are supported by the Limitorque MX/QX HART device. See
Appendix B for more information on HART data formats such as: Packed, Latin-1, Date and Time. See Appendix C for
more information on “Enum” or “Bits” formats. See Appendix E for more information on valid Response Codes for each
command.

22

3.5.1 Universal Commands

Table 3.7 – HART Universal Commands

Command Request Data Bytes Response Data Bytes

No. Description Byte Format Description Byte Format Description

0 Read Unique

Identifier

1 Read Primary

Variable

2 Read Loop

Current And
Percent Of
Range

3 Read Dynamic

Variables And
Loop Current

6 Write Polling

Address

7 Read Loop

Configuration

0

Unsigned-8

1

Enum

Polling Address of Device
Loop Current Mode

0
1-2
3
4
5
6
7
7
8
9-11
12
13
14-15
16

17-18
19-20
21

0
1-4

0-3
4-7

0-3
4
5-8
9
10-13
14
15-18
19
20-23

0
1

0
1

Unsigned-8
Enum
Unsigned-8
Unsigned-8
Unsigned-8
Unsigned-8
Unsigned-5
Enum
Bits
Unsigned-24
Unsigned-8
Unsigned-8
Unsigned-16
Bits

Enum
Enum
Enum

Enum
Float

Float
Float

Float
Enum
Float
Enum
Float
Enum
Float
Enum
Float

Unsigned-8
Enum

Unsigned-8
Enum

254”
Expanded Device Type = 0x3008
Min. number of request preambles = 5
HART Protocol Major Rev. = 7
Device Rev. Level
Software Rev. Level
(5 MSB) Hardware Rev. Level
(3 LSB) Physical Signaling Code=0
Device Flag Assignment = 1
Device ID (unique for given device type)
Min. number of response preambles=5
Max. number of device variables = 5
Configuration Change Counter
Extended Field Device Status: 0=OK,
1=Maintenance req’d, 2=Device Alert
Manufacturer Identification Code = 0x0030
Private Label Distributor Code = 0x0030
Device Profile = 1

Primary Variable Units = 57 (%)
Primary Variable

Primary Variable Loop Current (mA)
Primary Variable % Of Range

Primary Variable Loop Current (mA)
Primary Variable Unit Code
Primary Variable
Secondary Variable Unit Code
Secondary Variable
Tertiary Variable Units Code
Tertiary Variable
Quaternary Variable Unit Code
Quaternary Variable

Polling Address of Device (0-63)
Loop Current Mode

Polling Address of Device (0-63)
Loop Current Mode