Flowserve MX-100 User Manual

	USER INSTRUCTIONS
MX/DDC-100 Field Unit	Installation
FCD LMENIM2329-01 – 03/11	Operation
	Maintenance

Experience In Motion

MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

MX/DDC-100 Field Unit Installation and Operation Manual

©2011 Copyright Limitorque. All rights reserved. Printed in the United States of America.

Disclaimer

This document is meant for use with MX Installation and Operation Manual for MX-05 through MX-40. Information in this document is also applicable to MX-85 through MX-150. No part of this book shall be reproduced, stored in a retrieval system, or transmitted by any means, electronic, mechanical, photocopying, recording, or otherwise without the written permission of Limitorque. While every precaution has been taken in the preparation of this book, the publisher assumes no responsibility for errors or omissions. Neither is any liability assumed for damages resulting from the use of the information contained herein.

This document is the proprietary information of Limitorque, furnished for customer use ONLY. No other uses are authorized without written permission from Limitorque.

Limitorque reserves the right to make changes, without notice, to this document and the product it describes. Limitorque shall not be liable for technical or editorial errors or omissions made herein; nor for incidental and consequential damages resulting from the furnishing, performance or use of this document.

The choice of system components is the responsibility of the buyer, and how they are used cannot be the liability of Limitorque. However, Limitorque’s sales team and application engineers are always available to assist you in making your decision.

This manual contains information that is correct to the best of Limitorque’s knowledge. It is intended to be a guide and should not be considered as a sole source of technical instruction, replacing good technical judgment, since all possible situations cannot be anticipated. If there is any doubt as to exact installation, configuration, and/or use, call Limitorque at [phone]. The latest revisions to this document are available at www.flowserve.com.

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			MX/DDC-100 Field Unit Installation and Maintenance	FCD LMENIM2329-01 – 03/11
Contents
1	Introduction			5
	1.1	Purpose		5
	1.2	How to Use this Manual		5
	1.3	User Safety		5
	1.4	User Knowledge		6
	1.5	DDC-100 System Capabilities and Features		6
	1.6	General Specifications		7
2	System Components			8
	2.1	Introduction		8
	2.2	Hardware		8
		2.2.1	MX Actuator	9
		2.2.2	DDC–100 Field Unit	9
		2.2.3	Host Controller	10
		2.2.4	Master Station II	11
		2.2.5	Network Cable	12
	2.3	Software		13
		2.3.1	Modbus Protocol	13
		2.3.2	Modbus Function Codes	14
		2.3.3	Modbus Function Code 01 (Read Coil Status)	14
		2.3.4	Modbus Function Code 02 (Read Input Status)	15
		2.3.5	Modbus Function Code 03 (Read Holding Register)	17
		2.3.6	Modbus Function Code 04 (Read Input Register)	21
		2.3.8	Modbus Function Code 06 (Preset Single Register)	23
		2.3.9	Modbus Function Code 08 (Diagnostics)	26
		2.3.10	Modbus Function Code 15 (Force Multiple Coils)	27
		2.3.11	Modbus Function Code 16 (Preset Multiple Registers)	28
3	Installation and Configuration			30
	3.1	Site and Network Cable Preparation		30
		3.1.1	Site Preparation	30
		3.1.2	Network Cable Preparation	30
	3.2	Installation Verification		38
		3.2.1	Network Cabling Installation Verification	38
		3.2.2	Field Unit Installation Verification	38
	3.3	Field Unit Configuration		39
		3.3.1	Configuring Field Unit Parameters	39
	3.4	Configuration Confirmation		44
		3.4.1	Checking Connections	44
		3.4.2	View Settings	44
		3.4.3	Checking the Normal Display	44
4	Associated Documents			46
5	Troubleshooting			48
6 How to Order Parts				50
Appendix – Wiring Diagram				52
Appendix – MX/DDC Register Definitions				56		3
Appendix – Typical DDC-100 Network Installation Assignments				62

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

Figures

Figure 1.1 –		Typical DDC-100 system with or without a Master Station II	6
Figure 2.1 –		MX-05 actuator	8
Figure 2.2 –		DDC-100 field unit	9
Figure 2.3 –		Typical direct-to-host arrangement	10
Figure 2.4 –		Typical Master Station II (rear view)	11
Figure 2.5 –		Redundant connection operation in redundant host loop topology	12
Figure 3.1 –		Network connections	30
Figure 3.2 –		Removing outer plastic jacket	31
Figure 3.3 –		Separating cable parts	32
Figure 3.4 –­		Stripping conductors	32
Figure 3.5 –		Applying heat shrink tubing	33
Figure 3.6	–	Ring tongue connectors	33
Figure 3.7	–	Connecting network cable to MX terminal block	34
Figure 3.8	–­	Redundant bi-directional loop topology	36
Figure 3.9	–­	Daisy chain topology	37
Figure 3.10 – Error Messages			44
Figure A.1 (1 of 2) – Typical MX/DDC-100 wiring diagram			52
Figure A.1 (2 of 2) – Typical MX/DDC-100 wiring diagram			53
Figure A.2 - MX Terminal block			54

Tables

Table 2.1 – Modbus function codes supported		14
Table 2.2 – DDC-100 coil assignments, Modbus 05 command usage for digital outputs		14
Table 2.3 – Status Bit Definitions		15
Table 2.3 – Status Bit Definitions (continued)		16
Table 2.4 – Register definitions		18
Table 2.4 – Register definitions (continued)		19
Table 2.4 – Register definitions (continued)		20
Table 2.5 – DDC-100 coil assignments, Modbus 05 command usage for digital outputs		22
Table 2.6 – Modbus 06 command and field unit holding register 40001		24
Table 2.7 – Diagnostic Codes Supported by the DDC-100 Field Unit		27
Table 3.3 – Network cable terminations		34
Table 3.4	– MX/DDC digital input configurations (only one selection per row is permitted)	42
Table 3.5	– MX/DDC digital inputs (cross-reference of various inputs)	42
Table 3.6	– Digital input voltages	43
Table 3.7	– MX/DDC digital outputs S1-2 and R1-8	43

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

1 Introduction

1.1 Purpose

This manual explains how to install and operate the Flowserve Limitorque MX™/DDC-100 field unit and is to be used as an addendum to Bulletin FCD LMENIM2306, MX Electronic Actuator Installation and Operation Manual. Up to 250 actuators, each containing a DDC-100 field unit, may be connected by a single twisted-pair cable to form a DDC-100 network. This network permits the actuators to be operated by various control room devices such as a distributed control system (DCS), a programmable logic controller (PLC), or a personal computer (PC). The DDC-100 system communicates status and alarm data from each MX and valve.

1.2 How to Use this Manual

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

Section 1 - Introduction

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

Section 2 - System Components

Focuses on the description of the DDC-100 system hardware and software components.

Section 3 - Installation and Configuration

Provides details for installing and configuring a field unit.

Section 4 - Associated Documents

Provides a list of documents on related subjects for additional MX and DDC-100 system information.

Section 5 - Troubleshooting

Section 6 - How to Order Parts

Appendix A - Wiring Diagram

Details wiring connections.

Appendix B - MX/DDC Register Definitions

Appendix C - Typicl DDC-100 Network Installation Assignments

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:

cc WARNING: Refers to personal safety. Alerts the user to potential danger. Failure to follow warning notices could result in personal injury or death.

aa CAUTION: Directs the user’s attention to general precautions that, if not followed, could result in personal injury and/or equipment damage.

5

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

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

1.4 User Knowledge

It is recommended that the user read this manual in its entirety before the DDC-100 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.

1.5 DDC-100 System Capabilities and Features

Limitorque’s distributed digital control (DDC) valve control network supports up to 250 actuators over a single twisted-pair cable using Modbus™ protocol. MX actuators and other devices can be accessed from a control room for integration with a plant asset management (PAM) system, distributed control system (DCS), programmable logic controller (PLC), or personal computer (PC) based network. The DDC-100 system consists of a host system, controller, network, and field units. A typical DDC-100 system is shown in Figure 1.1.

Figure 1.1 – Typical DDC-100 system with or without a Master Station II

Host controller

Optional

Master

Station

Network

RS-485

	1	250
		.
		.
		.
MX field
units	2	5
(up to 250)

6	3	4

MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

1.6 General Specifications

Direct-to-Host Specifications:

•Direct connection to host controller

•Communicates using the Modbus protocol and the RS-485 electrical standards

•Configurable bitmap

•High-level surge protection on network

Network Specifications:

•Redundant bi-directional loop or daisy chain topology

•Modbus protocol and the RS-485 electrical standards

•High speed—up to 19.2 kbaud communications

MX Field Unit Specifications:

•“OPEN,” “STOP,” and “CLOSE” commands

•“ESD” and “MOVE–TO” position commands

•Actuator status and alarm messages

•Six digital inputs and two analog inputs for user (see Table 2.2, Register Definitions)

•Two surge-protected and mutually isolated communication channels

•MX local control panel configuration

•Torque output (for reference only) and position feedback

•User’s analog input feedback

•Nine digital outputs maximum (three standard/six optional)

Master Station II (Optional) Specifications:

•Supports all Limitorque DDC-100 field units: MX, L120, LY

•Controls up to 250 MOVs

•User-friendly touch panel operator interface:

•Permits configuration and control of DDC-100 network

•Configures communication to host or DCS (Distribution Control System)

•Password protected

•Optional Hot Standby Configuration: Automatically assumes control on Primary Master Failure or on command from the DCS or touch panel

•Provides realtime status of field units through continuous cyclical polling

•Modbus RTU and TCP/IP:

•Addressable

•RS-232/485/422

•10/100 baseT

•Built-in Web server for ease of actuator and network diagnostics

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	2		MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11
		System Components
		2.1	Introduction
		This section gives an overview of the components used in the DDC-100 system. The field unit is installed in each MX
		actuator. The network cable connects the field unit to the network via the actuator terminal block. The network cable is
		connected to a host controller or Master Station II.
		2.2	Hardware
		NOTE: Recommended storage procedures are detailed in Bulletin FCD LMENIM2314, MX Maintenance and Spare
		Parts Manual. Failure to comply with recommended procedures will void the warranty. For longer-term storage,
		contact Flowserve for procedures and recommendations.
		Figure 2.1 – MX-05 actuator
		Piece	Description
		1	Handwheel
		2	Declutch Lever
		3	Oil Fills (dotted arrow depicts fill on declutch side)
		4	Controls Compartment (field unit location)
		5	LCD Display
		6	Control Knobs
		7	Ground Lug
		8	Thrust/Torque Base
		9	Conduit Entries
		10	Terminal Compartment
		11	Motor
		12	Nameplate
			1

		3	2
	12
	11
	10
			4
			5
9	8	7	6

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

2.2.1 MX Actuator

The MX is a multi-turn valve actuator designed for operation of ON-OFF and modulating valve applications. This actuator controls the opening and closing of valves. See Figure 2.1.

Features of the MX include:

•Non-intrusive setup

•Separately sealed terminal chamber

•Absolute encoder for valve position sensing (no battery required)

•32-character graphical LCD display with 180° rotation

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

2.2.2 DDC–100 Field Unit

The DDC-100 field unit is installed in the MX controls compartment. This unit permits the actuator to be controlled by a host controller or Master Station II via the DDC-100 network. The field unit includes two high-level, surge-protected, and isolated network communication channels, configurable digital I/O, and configuration via LCD screen. The following commands and information may be transmitted over the DDC-100 network:

•“OPEN,” “STOP,” and “CLOSE” commands

•“ESD” and “MOVE–TO” position commands

•Actuator status and alarm messages

•Six digital inputs and two analog inputs for user (see Table 2.2, Register Definitions)

•Two surge-protected and mutually isolated communication channels

•MX local control panel configuration

•Torque output (for reference only) and position feedback

•User’s analog input feedback

•Nine digital outputs maximum (three standard/six optional)

Figure 2.2 – DDC-100 field unit

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

2.2.3 Host Controller

In the DDC-100 system, the network can be connected directly to a host controller without an interposing Master Station II.

In this configuration, the host sends commands and messages to, and gathers responses from, the field units. The commands and messages are sent via RS-485 data signals. The gathered responses are stored in a data table in the host and are periodically updated by sequential polling of the field units. The host controls up to 250 field units. See Section 3.1.2.3, Network Cable Connection to Host System or Master Station II.

When a host controller is used to directly communicate with the field units, i.e., direct-to-host communications, it communicates using the Modbus protocol and the RS-485 electrical standard. This host controller can be one of the following:

•Distributed control system (DCS)

•Programmable logic controller (PLC)

•Personal computer (PC)

•Plant Asset Management (PAM) system

Figure 2.3 – Typical direct-to-host arrangement

DCS

PC/PAM

PLC

1	250
2	5
3	4

10

RS-485

MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-00 – 2/08

2.2.4 Master Station II

A Master Station II may be used in the DDC-100 system. Master Station II’s are normally located in the control room, and serve as the interface between the field units and the host controller. The following functions are provided:

•Continuous polling of actuator network

•Message routing to/from field units

•Data concentration

•Data logging

In this configuration, the Master Station II receives commands from a host controller. The Master Station II communicates with the host controller using the Modbus Protocol and the RS-232 or RS-485 electrical standard. See Bulletin FCD LMENIM5001, DDC-100 Master Station II Installation and Operation Manual for details.

The Master Station II sends commands and messages to, and gathers responses from, the field units. The commands and messages are sent via RS-485 data signals. The gathered responses are stored in a poll table in the Master Station II and are periodically updated by sequential polling of the field units. The Master Station II controls up to 250 field units. See Section 3.1.2.3, Network Cable Connection to Host System or Master Station II.

Figure 2.4 – Typical Master Station II (rear view)

		10		1		2
			NO SERVICEABLE PARTS INSIDE
		HOT STANDBY			SINGLE
	DO NOT USE	OPTIONAL				DO NOT USE
	WITH 110-240VAC					WITH 110-240VAC
	EXTERNAL 24VDC	PRINTER / DEBUG	ETHERNET		PRINTER / DEBUG	EXTERNAL 24VDC	4
	INPUT ONLY					INPUT ONLY
8	+ --					+ --
	24VDC					24VDC

7

MOVE JUMPERS ON INSIDE OF UNIT FOR PROPER OPERATION

l o FUSES

FUSES 2 AMP 250 V

ON

POWER

OFF

INPUT 100-240VAC ~1.5A

									MOVE JUMPERS ON
									INSIDE OF UNIT FOR
DCS								DCS	PROPER OPERATION
								FUSES
								2 AMP
								250 V	FUSES
CHANNEL A						CHANNEL B		ON	l o
								POWER
								OFF
								INPUT
	*	GND				*	GND	100-240VAC
TA			DA		DATA
DATA DA								~1.5A
				TA

9

6

3

1.Ethernet ports

2.Printer/Debug port

3.DCS port

4.Auxiliary 24 VDC power connection

5.Main power switch and connector for 120-240 VAC

6.Electrostatic ground

7.Hot Standby unit main power switch and connector for 120-240 VAC

8.Hot Standby auxiliary 24 VDC power connection

9.Hot Standby DCS Port

10.Hot Standby Printer/Debug Port

5

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

2.2.5 Network Cable

The network consists of a shielded, twisted-pair cable that connects all field units and the host/Master Station II. The cable is normally connected in a loop fashion so that any single break or short will not disable communication.

Figure 2.5 – Redundant connection operation in redundant host loop topology

Signal initiated from host fails to reach				Instead, signal routes to field unit using
field unit which is located after fault...				other side of the loop cable and
				completes connection.

The network cable connects the field units to the host controller or Master Station II. Belden 3074F, 3105A, or 9841 shielded, twisted-pair cable should be used. The use of other cables may result in a reduction of internodal distances or increased error rate, and is the user’s responsibility.

Belden 3074F Specifications

•Total cable length between repeaters or nodes with repeaters, up to 19.2 kbps: 5000 ft (1.52 km) For loop mode, this is the total length between operating field units. If a field unit loses power, then the relays internal to the field unit connect the A1 Channel to the A2 Channel, which effectively doubles the length of the cable (assuming a single field unit fails). To ensure operation within specifications in the event of power failure to field units, this consideration must be added. Example: To ensure operation within specification when any two consecutive field units lose power, the maximum length of cable, up to 19.2 kbps, should not exceed 5000 ft (1.52 km) per every four field units. See Section 3.1.2.3, Network Cable Connection to Host Controller or Master Station II.

Key Specifications

•Resistance/1000 ft = 18 AWG (7 x 26) 6.92 ohms each conductor (13.84 ohms for the pair)

•Capacitance/ft = 14 pF (conductor-to-conductor)

•Capacitance/ft = 14 pF (conductor-to-shield)

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

Belden 3105A Specifications

•Total cable length between repeaters or nodes with repeaters, up to 19.2 kbps: 4500 ft (1.37 km) For loop mode, this is the total length between operating field units. If a field unit loses power, then the relays internal to the field unit connect the A1 Channel to the A2 Channel, which effectively doubles the length of the cable (assuming a single field unit fails). To ensure operation within specifications in the event of power failure to field units, this consideration must be added. Example: To ensure operation within specification when any two consecutive field units lose power, the maximum length of cable, up to 19.2 kbps, should not exceed 4500 ft (1.37 km) per every four field units. See Section 3.1.2.3, Network Cable Connection to Host Controller or Master Station II.

Key Specifications

•Resistance/1000 ft = 22 AWG (7 x 30) 14.7 ohms each conductor (29.4 ohms for the pair)

•Capacitance/ft = 11.0 pF (conductor-to-conductor)

•Capacitance/ft = 20.0 pF (conductor-to-shield)

Belden 9841 Specifications

•Total cable length between repeaters or nodes with repeaters: up to 19.2 kbps: 3500 ft (1 km) For loop mode, this is the total length between operating field units. If a field unit loses power, then the relays internal to the field unit connect the A1 Channel to the A2 Channel, which effectively doubles the length of the cable (assuming a single field unit fails). To ensure operation within specifications in the event of power failure to field units, this consideration must be added. Example: To ensure operation within specification when any two consecutive field units lose power, the maximum length of cable, up to 19.2 kbps, should not exceed 3500 ft (1 km) per every four field units. See Section 3.1.2.3, Network Cable Connection to Host Controller or Master Station II.

Key Specifications

•Resistance/1000 ft = 24 AWG (7 x 32) 24 ohms each conductor (48 ohms for the pair)

•Capacitance/ft = 12.8 pF (conductor-to-conductor)

•Capacitance/ft = 23 pF (conductor-to-shield)

2.3Software

2.3.1 Modbus Protocol

The Modbus protocol was developed by AEG Modicon® for communicating to various networked devices. The relationship between these devices and a central controller is called a master-slave relationship in which the master (host device) initiates all communication. The slave devices (DDC-100 field units in the actuators) respond to the queries from the master.

Modbus only permits one device to communicate at any given time (simultaneous communication is prohibited) to ensure process control integrity.

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

2.3.2 Modbus Function Codes

The controlling device (master) must conform to the Modbus protocol as defined in the Modbus-IDA Modbus Application Protocol Specification V1.1a (http://www.Modbus-IDA.org) and support Modbus function codes 01 through 06, 08, 15, and 16. These function codes are a subset of the complete protocol and are defined in Table 2.1.

Table 2.1 – Modbus function codes supported

		Extended
Function		Bit/Register	Addressing
Code	Name	Addressing	Range
01	Read Coil Status	Bit	0,000 - 9,999
02	Read Discrete Inputs	Bit	10.000 - 19,999
03	Read Holding Register	Register	40,000 - 49,999
04	Read Input Register	Register	30,000 - 39,999
05	Force Single Coil	Bit	0,000 - 9,999
06	Preset Single Register	Register	40,000 - 49,999
08	Diagnostics	N/A	N/A
15	Force Multiple Coils	Bit	0,000 - 9,999
16	Preset Multiple Registers	Register	40,000 - 49,999

See Table 2.2 for a complete listing of MX/DDC holding registers.

2.3.3 Modbus Function Code 01 (Read Coil Status)

This function code is used to read the coil status in the DDC-100 Field Unit. There are nine coils available to be read on DDC-100 Field Units as shown in Table 2.2. For the MX/DDC, Coil 1 indicates CLOSE contactor and is interlocked with Coil 2, Coil 2 indicates OPEN contactor and is interlocked with Coil 1. When the I/O Module is used in non-MOV (motor-operated valve) mode, relays 1 through 6 or coils 3 through 8 are available for user configuration.

Table 2.2 – DDC-100 coil assignments, Modbus 05 command usage for digital outputs

Coil Number	Bit Number	Function
1	00	Close/Stop
2	01	Open/Stop
3	02	S1 or R1 (Opt) Latched
4	03	S2 or R2 (Opt) Latched
5	04	R3 (Opt) Latched
6	05	R4 (Opt) Latched
7	06	R5 (Opt) Latched
8	07	R6 (Opt) Latched
9	08	R7 (Opt) Latched
10	09	R8 (Opt) Latched

The normal response to the (05) command is an echo of the command.

Example

Poll field unit number 3 for 8 coils starting at coil 1.

Query:  0301000000083C2E

Response:  03010118503A

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

Message Breakdown

Query				Response
03		Slave (Field Unit) Address		03		Slave (Field Unit) Address
01		Function		01		Function
00		Starting Address Hi		01		Byte Count
00		Starting Address Lo		181		Data (Coils 8 - 1)
00		No. of Points Hi		503A		Error Check (CRC)
08		No. of Points Lo
3C2E		Error Check (CRC)

Note 1: 18h equals 00011000 or coils 4 and 5 are ON.

2.3.4 Modbus Function Code 02 (Read Input Status)

This function code is used to read the discrete input status bits in the DDC-100 Field Unit. The use of this function code will provide the user with the input status bits that are used to develop holding registers 9 through 13. The status bit inputs are contained in locations 10129-10208 for each DDC-100 Field Unit and are defined in Table 2.3.

Table 2.3 – Status Bit Definitions

		Modbus
	Bit Number	Bit	MX/DDC
		Address
	129		Opened
		128
	130	129	Closed
	131	130	Stopped in mid-travel
	132	131	Opening
	133	132	Closing
	134	133	Valve jammed
	135	134	Not in remote
	136	135	Combined fault
	137	136	Over-temperature fault
	138	137	Actuator failing to de-energize
	139	138	Channel A fault
	140	139	Channel B fault
	141	140	Open torque switch fault
	142	141	Close torque switch fault
	143	142	Valve operated manually fault
	144	143	Phase error
	145	144	Open inhibit active
	146	145	Close inhibit active
	147	146	Not used
	148	147	Not used
	149	148	One or more phases is missing
	150	149	Reverse phase sequence is occurring
	151	150	ESD conflict
	152	151	Inhibit conflict
	153	152	Use in local/stop (input must be set for CSE and enabled)	15
	154	153	Not used
	155	154	Network emergency shutdown (ESD) is active
	156	155	Local emergency shutdown is active

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

Table 2.3 – Status Bit Definitions (continued)

		Modbus
	Bit Number	Bit	MX/DDC
		Address
	157		Field unit microprocessor has reset since the last poll
		156
	158	157	MX in stop move
	159	158	Opening in local mode
	160	159	Closing in local mode
	161	160	Close contactor (interlocked)
	162	161	Open contactor (interlocked)
	163	162	S1 or R1 (opt)
	164	163	S2 or R2 (opt)
	165	164	R3 (opt)
	166	165	R4 (opt)
	167	166	R5 (opt)
	168	167	R6 (opt)
	169	168	R7 (opt)
	170	169	Network relay
	171	170	R8 (opt)
	172	171	Not used
	173-176	172-175	Mov series (0=1, A=9)
	177	176	Remote switch
	178	177	Thermal overload
	179	178	Open torque switch
	180	179	Open limit switch
	181	180	Close torque switch
	182	181	Close limit switch
	183	182	Not used
	184	183	Not used
	185	184	User Input 0
	186	185	User Input 1
	187	186	User Input 2
	188	187	Remote stop input
	189	188	Remote open input
	190	189	Remote close input
	191	190	Not used
	192	191	Not used
	193	192	Analog board 1 present
	194	193	Analog board 2 present
	195	194	Analog Input #1 lost
	196	195	Analog Input #2 lost
	197	196	Network Channels A/B timed out
	198	197	Relay board R5-R8 present
	199	198	DDC board present
16	200	199	Relay board R1-R4 and RM present
	201	200	FF board present
	202	201	PB PA board present
	203	202	CLE assigned for input 2
	204	203	DNET board present

MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

Table 2.3 – Status Bit Definitions (continued)

Modbus

Bit Number Bit MX/DDC

Address

205204 Lost Phase Input

206205 Phase Reverse Input

207	206	Not used
208	207	PB DP board present

Example

Poll field unit number 22 for 16 inputs starting at input 129 with the actuator opening.

Query:  1602008000107B09

Response:  1602020108CDED

Message Breakdown

Query				Response
16		Slave (Field Unit) Address		16		Slave (Field Unit) Address
02		Function		02		Function
00		Starting Address Hi		02		Byte Count
80		Starting Address Lo		011		Data (Inputs 10136 - 10129)
00		No. of Points Hi		082		Data (Inputs 10144 - 10137)
10		No. of Points Lo		CDED		Error Check (CRC)
7B09		Error Check (CRC)

Note 1: 01h equals 0000 0001 (actuator open input bit is ON).

Note 2: 08h equals 0000 1000 (actuator Channel B Fail bit is ON).

2.3.5 Modbus Function Code 03 (Read Holding Register)

This function code is used to read the binary contents of holding registers in the DDC-100 Field Unit. This function code is typically used during the network polling cycle. A network poll should consist of field unit registers 9 (Status) and 10 (Fault) as a minimum. Holding register 8 should also be polled when the actuator is configured for the analog feedback option or position control. See Table 2.4 for a complete listing of the holding registers.

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

Table 2.4 – Register definitions

Register #	Description	Meaning
1	Command	Registers 1 and 2 are write-only registers used for Modbus
		Function Code 06
2	Argument	Registers 1 and 2 are write-only registers used for Modbus
		Function Code 06
3	Analog Output 1	Analog Output 1 Value (Default 0-100)1
4	Analog Output 2	Analog Output 2 Value (Default 0-100)1
5	Analog Input	Main Power (Volts)
6	Analog Input	Analog Input 1 (Default 0-100)1		User 4-20 mA / 0-20 mA Input
7	Analog Input	Analog Input 2 (Default 0-100)1		User 4-20 mA / 0-20 mA Input
8	Position	Valve Position, Scaled Value (Default 0-100)1
9	Status Register	16 Bits of field unit status:
		Bit 0 Opened
		Bit 1	Closed
		Bit 2	Stopped in Mid-Travel
		Bit 3	Opening
		Bit 4	Closing
		Bit 5 Valve jammed
		Bit 6	Not in Remote2
		Bit 7	Combined fault3
		Bit 8	Over temperature fault
		Bit 9	Future Implementation
		Bit 10	Network Channel A fault4 (Terminals 5 and 4)
		Bit 11	Network Channel B fault4 (Terminals 13 and 14)
		Bit 12	Open torque switch fault
		Bit 13	Close torque switch fault
		Bit 14	Valve-operated manually fault
		Bit 15	Phase error

Note 1: Default value is scaled 0-100 of span. Changes made to “Analog Scale” affect analog registers (3, 4, 6, 7, 8) and “move-to” commands. (0-100, 0-255, 0-4095)

Note 2: MX/DDC actuators shipped after 2nd QTR, 1999, have the following definition of Register 9 Bit 6. When this bit has a value of 1 or true, the actuator is in LOCAL or STOP (unavailable for network control). The actuator selector switch in REMOTE (available for network control) is indicated by Register 12 Bit 0 having a value of 1 or true.

IMPORTANT: Verify host program when installing an MX/DDC actuator shipped after 2nd QTR, 1999, on a network commissioned before 2nd QTR, 1999, for proper indication of selector switch values. Failure to verify proper selector switch indication at the host may cause unsafe conditions at the facility.

MX/DDC actuators shipped prior to 2nd QTR, 1999, have the following definition for Register 9 Bit 6. When this bit has a value of 1 or true, the actuator selector switch is in LOCAL mode. This bit does not indicate STOP or REMOTE. The actuator selector switch in REMOTE (available for network control) is indicated by Register 12 Bit 0 having a value of 1 or true. Register 9 Bit 6 value 0 (zero) or false AND Register 12 Bit 0 value 0 (zero) or false indicates selector switch is in the STOP position.

Note 3: Combined Fault bit is high when Bit 5 or 8 or 9 or 15 or (Bits 10 and 11) is high.

Note 4: Channel A is physical connection A1. Channel B is physical connection A2. (See Appendix A.)

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

Table 2.4 – Register definitions (continued)

Register #	Description	Meaning
10	Fault Register	16 Bits of field status
		Bit 0	Open inhibit active
		Bit 1	Close inhibit active
		Bit 2	Not Used
		Bit 3	Not Used
		Bit 4	One or more phases are missing
		Bit 5	Reverse phase sequence is occurring
		Bit 6	ESD conflict
		Bit 7	Inhibit conflict
		Bit 8	CSE in local/stop (input must be set for CSE and enabled)
		Bit 9	Not Used
		Bit 10	Network emergency shutdown is active
		Bit 11	Local PB emergency shutdown is active
		Bit 12	Field unit microprocessor has reset since the last poll
		Bit 13 MX in stop mode
		Bit 14	Opening in local mode
		Bit 15	Closing in local mode
11	Digital Outputs	Value of 16 Digital Outputs
		Bit 0	Close contactor (Interlocked)
		Bit 1	Open contactor (Interlocked)
		Bit 2	S1 or R1 (Opt)
		Bit 3	S2 or R2 (Opt)
		Bit 4	R3 (Opt)
		Bit 5	R4 (Opt)
		Bit 6	R5 (Opt)
		Bit 7	R6 (Opt)
		Bit 8	R7 (Opt)
		Bit 9	Network Relay
		Bit 10	R8 (Opt)
		Bit 11	Not Used
		BIT 12-15 MOV Series (0 = 1, A = 9)
12	Digital Inputs 1	Value of 16 Digital Inputs
		Bit 0 Remote Switch
		Bit 1	Thermal Overload
		Bit 2	Open Torque Switch
		Bit 3	Open Limit Switch
		Bit 4	Close Torque Switch
		Bit 5	Close Limit Switch
		Bit 6	Not Used
		Bit 7	Not Used
		Bit 8	User Input 0 (Default=ESD), Terminal 30
		Bit 9	User Input 1 (Default=Open Inhibit), Terminal 34
		Bit 10	User Input 2 (Default=Close Inhibit), Terminal 35
		Bit 11	Remote Stop Input, Terminal 26
		Bit 12	Remote Open Input, Terminal 25
		Bit 13	Remote Close Input, Terminal 27
		Bits 14-15 Not Used

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MX/DDC-100 Field Unit Installation and Maintenance  FCD LMENIM2329-01 – 03/11

Table 2.4 – Register definitions (continued)

Register #	Description	Meaning
13	Digital Inputs 2	Value of 16 Digital Inputs
		Bit 0 Analog board 1 present
		Bit 1 Analog board 2 present
		Bit 2	Analog Input 1 lost
		Bit 3	Analog Input 2 lost
		Bit 4	Network Channels A/B timed out
		Bit 5	Relay board R5-R8 present
		Bit 6	DDC board present
		Bit 7 Relay board R1-R4 and RM present
		Bit 8	Foundation Fieldbus board present
		Bit 9	Profibus PA board present
		Bit 10	CSE chosen for input 2
		Bit 11	DeviceNet board present
		Bit 12	Phase lost
		Bit 13	Phase reverse
		Bit 14	Not Used
		Bit 15	Profibus DP board present
14	Timers and Analog Channels	Internal compartment temperature1
15	User Faults	Bits 0-15		Not Used
16	Current State	Bits 0-15		Not Used
17	Field Unit Holding Register	Special Applications Only
18	Field Unit Holding Register	Special Applications Only
19	Field Unit Holding Register	Special Applications Only
20	Field Unit Holding Register	Special Applications Only
21	Field Unit Holding Register	Special Applications Only
22	Field Unit Holding Register	Special Applications Only
23	Field Unit Holding Register	Special Applications Only
24-44	Reserved	Special Applications Only
45-47	Not Named	Special Applications Only
48	TP_START_POSITION	Special Applications Only
49	TP_STOP_POSITION	Special Applications Only
50	TP_SAMPLE	Special Applications Only
51	TP_MID_T_HIGH	Special Torque Applications Only
52	TP_MID_T_POS	Special Applications Only
53	TP_MID_T_AV_VAL	Special Torque Applications Only
54	TP_STOP_VAL	Special Applications Only
55	TP_BEFORE_ MID_T_HIGH	Special Torque Applications Only
56	TP_AFTER_ MID_T_HIGH	Special Torque Applications Only

Note 1: Range is +90°C to -55°C. High byte 00 indicates positive (+) and 01 indicates negative (-). Low byte indicates temperature value.

Example: 0x0019 = +25°C 0x011E = -30°C

Example

Poll field unit number 125 for 3 registers starting at register 8 with the actuator stopped between the limits and in local mode.

Query:  7D0300070003BFF6

Response:  7D0306003D084400003E07

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