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Honeywell Process Solutions Modbus® RTU Serial Communications User Manual 51-52-25-66 Revision T February 2013

Modbus RTU Message Format 4 Modbus® RTU Serial Communications User Manual 02/13 2.3 IEEE 32-bit Floating-Point Register Information The Modbus ap

Modbus RTU Message Format 02/13 Modbus® RTU Serial Communications User Manual 5 Exponent The exponent is defined by an unsigned 8-bit binary value (

Modbus RTU Message Format 6 Modbus® RTU Serial Communications User Manual 02/13 Reserved Operands Per the Standard certain exceptional forms of flo

Modbus RTU Message Format 02/13 Modbus® RTU Serial Communications User Manual 7 IEEE Floating Point Formats S E7 E6 E5 E4 E3 E2 E1E0 M22 M21M20 M19

Modbus RTU Message Format 8 Modbus® RTU Serial Communications User Manual 02/13 REGISTER N (High)REGISTER N+1 (Low)High Low High LowFP L

Modbus RTU Function Codes 02/13 Modbus® RTU Serial Communications User Manual 9 3. Modbus RTU Function Codes The Honeywell Universal Modbus RTU prot

Modbus RTU Function Codes 10 Modbus® RTU Serial Communications User Manual 02/13 Table 3-2 Maximum Number of Object Addresses for Each Instrument T

Modbus RTU Function Codes 02/13 Modbus® RTU Serial Communications User Manual 11 Object Name QX Minitrend SX Multitrend Minitrend V5 Multirend Plus

Modbus RTU Function Codes 12 Modbus® RTU Serial Communications User Manual 02/13 Table 3-3 Maximum Number of Registers Allowable per Request Functi

Modbus RTU Function Codes 02/13 Modbus® RTU Serial Communications User Manual 13 3.1 Function Code 01 – Read Digital Output Status Description Func

ii Modbus® RTU Serial Communications User Manual 02/13 Copyright, Notices, and Trademarks Printed in U.S.A. – © Copyright 2010 by Honeywell Revisio

Modbus RTU Function Codes 14 Modbus® RTU Serial Communications User Manual 02/13 Table 3-5 DR4500 Digital Output Mapping Coil Number Instrument F

Modbus RTU Function Codes 02/13 Modbus® RTU Serial Communications User Manual 15 3.2 Function Code 02 – Read Digital Input Status Description Funct

Modbus RTU Function Codes 16 Modbus® RTU Serial Communications User Manual 02/13 3.3 Function Codes 03/04 – Read Input Registers Description Functi

Modbus RTU Function Codes 02/13 Modbus® RTU Serial Communications User Manual 17 Response The register data in the response message are packed as tw

Modbus RTU Function Codes 18 Modbus® RTU Serial Communications User Manual 02/13 3.4 Function Code 05 – Force Single Digital Output Description For

Modbus RTU Function Codes 02/13 Modbus® RTU Serial Communications User Manual 19 3.5 Function Codes 06 – Preset Single Register Description Presets

Modbus RTU Function Codes 20 Modbus® RTU Serial Communications User Manual 02/13 3.6 Function Code 08 – Loopback Message Description Echoes receive

Modbus RTU Function Codes 02/13 Modbus® RTU Serial Communications User Manual 21 3.7 Function Codes 16 (10h) – Preset Multiple Registers Descriptio

Modbus RTU Function Codes 22 Modbus® RTU Serial Communications User Manual 02/13 3.8 Function Code 17 (11h) – Report Device ID Description Function

Modbus RTU Function Codes 02/13 Modbus® RTU Serial Communications User Manual 23 +Device Specific Data: Device Description Model ID Device Class ID

02/13 Modbus® RTU Serial Communications User Manual iii About This Document Abstract This document provides generic information for Honeywell instr

Modbus RTU Function Codes 24 Modbus® RTU Serial Communications User Manual 02/13 Device Class ID: The Device Classification. (one byte) (byte 22) C

Modbus RTU Exception Codes 02/13 Modbus® RTU Serial Communications User Manual 25 4. Modbus RTU Exception Codes Introduction When a master device se

Modbus RTU Exception Codes 26 Modbus® RTU Serial Communications User Manual 02/13 Table 4-1 Modbus RTU Data Layer Status Exception Codes Exception

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 27 A. Appendix: Register Map What’s in this appendix? This append

Appendix B: CRC-16 Calculation 28 Modbus® RTU Serial Communications User Manual 02/13 Start Address (hex) End Address (hex) Description See Subsect

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 29 A.2 Miscellaneous Register Map A.2.1 RSX, VPR, VRX, UDC5300

Appendix B: CRC-16 Calculation 30 Modbus® RTU Serial Communications User Manual 02/13 A.2.2 DR4300, DR4500 Chart Record Map Address (hex) Register

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 31 A.3 Loop Value Integer Register Map The following table appli

Appendix B: CRC-16 Calculation 32 Modbus® RTU Serial Communications User Manual 02/13 Address (hex) Register (decimal) Parameter Name Access Notes

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 33 Address (hex) Register (decimal) Parameter Name Access Notes

iv Modbus® RTU Serial Communications User Manual 02/13 Contents 1. INTRODUCTION ...

Appendix B: CRC-16 Calculation 34 Modbus® RTU Serial Communications User Manual 02/13 Note 11: UDC3500/UDC3200: Positional Proportional Control slid

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 35 A.4 Loop 2 and Extended Value Integer Register Map – UDC3500

Appendix B: CRC-16 Calculation 36 Modbus® RTU Serial Communications User Manual 02/13 Address (hex) Register (decimal) Parameter Name Access Notes

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 37 Address (hex) Register (decimal) Parameter Name Access Notes

Appendix B: CRC-16 Calculation 38 Modbus® RTU Serial Communications User Manual 02/13 A.5 Loop Value Register Map This table contains addresses of

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 39 Address (hex) Register (decimal) Parameter Name Access Notes

Appendix B: CRC-16 Calculation 40 Modbus® RTU Serial Communications User Manual 02/13 Address (hex) Register (decimal) Parameter Name Access Notes

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 41 Address (hex) Register (decimal) Parameter Name Access Notes

Appendix B: CRC-16 Calculation 42 Modbus® RTU Serial Communications User Manual 02/13 Address (hex) Register (decimal) Parameter Name Access Notes

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 43 A.6 Analog Input Value Register Map Address (hex) Register (d

02/13 Modbus® RTU Serial Communications User Manual v A.13 Maintenance (HealthWatch) Value Register Map ...

Appendix B: CRC-16 Calculation 44 Modbus® RTU Serial Communications User Manual 02/13 A.7 Communication or Constant Value Register Map Address (hex

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 45 A.7.1 Extended Comms for X Series recorders Address (hex) Reg

Appendix B: CRC-16 Calculation 46 Modbus® RTU Serial Communications User Manual 02/13 A.8 Math, Calculated Value, or Variable Register Map Address

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 47 A.9 Math or Calculated Value Status Register Map Address (hex

Appendix B: CRC-16 Calculation 48 Modbus® RTU Serial Communications User Manual 02/13 A.10 Totalizer Value Register Map Address (hex) Register (dec

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 49 A.11 Totalizer Status Register Map Address (hex) Register (de

Appendix B: CRC-16 Calculation 50 Modbus® RTU Serial Communications User Manual 02/13 A.12 Shed Timer Reset Register Address (hex) Register (decima

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 51 A.13 Maintenance (HealthWatch) Value Register Map This table

Appendix B: CRC-16 Calculation 52 Modbus® RTU Serial Communications User Manual 02/13 Address (hex) Register (decimal) Channel Number Access Notes

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 53 A.14 Time Register Map Address (hex) Register (decimal) Chann

vi Modbus® RTU Serial Communications User Manual 02/13 Tables Table 1-1 Communication and Configuration User Manuals _____________________________

Appendix B: CRC-16 Calculation 54 Modbus® RTU Serial Communications User Manual 02/13 A.15 Alarm Status Register Map Address (hex) Register (decima

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 55 A.16 Alarm Set Point Value Register Map Address (hex) Regist

Appendix B: CRC-16 Calculation 56 Modbus® RTU Serial Communications User Manual 02/13 A.16.1 Alarm Status Address (hex) Register (decimal) Channel

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 57 A.17 Set Point Programmer Value Register Map Address (hex) Re

Appendix B: CRC-16 Calculation 58 Modbus® RTU Serial Communications User Manual 02/13 Address (hex) Register (decimal) Channel Number Access Notes

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 59 A.18 Set Point Programmer Additional Values Register Map Addr

Appendix B: CRC-16 Calculation 60 Modbus® RTU Serial Communications User Manual 02/13 Address (hex) Register (decimal) Channel Number Access Notes

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 61 Address (hex) Register (decimal) Channel Number Access Notes

Appendix B: CRC-16 Calculation 62 Modbus® RTU Serial Communications User Manual 02/13 A.19 Set Point Programmer Segment Map A profile can contain

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 63 A.19.1 Segment Register Map The table below describes the regi

Introduction 02/13 Modbus® RTU Serial Communications User Manual 1 1. Introduction 1.1 Modbus RTU Implementation This implementation is designed to

Appendix B: CRC-16 Calculation 64 Modbus® RTU Serial Communications User Manual 02/13 A.19.2 Example For Determining a Segment Register To change th

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 65 A.20 Herculine Smart Actuator Value Register Map Address(hex)

Appendix B: CRC-16 Calculation 66 Modbus® RTU Serial Communications User Manual 02/13 1AFE 46911 System Status R Bit Packed System Status Fai

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 67 A.21 Herculine Smart Actuator Factory Data Register Map Addre

Appendix B: CRC-16 Calculation 68 Modbus® RTU Serial Communications User Manual 02/13 A.22 Herculine Smart Actuator Maintenance Data Register Map A

Appendix B: CRC-16 Calculation 02/13 Modbus® RTU Serial Communications User Manual 69 B. Appendix: CRC-16 Calculation See following function: exter

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Modbus RTU Message Format 2 Modbus® RTU Serial Communications User Manual 02/13 2. Modbus RTU Message Format Table 2-1 Modbus RTU Message Formats C

Modbus RTU Message Format 02/13 Modbus® RTU Serial Communications User Manual 3 General Modbus RTU message format Query message format [Slave Addres