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Table of contents
INTRODUCTION ....................................................................................................................................... 2
1. OVERVIEW ............................................................................................................................................ 3
2. MODULE COMMUNICATION SPECIFICATION ................................................................................ 4
2-1. SUPPORTED MODULES ............................................................................................................................ 4
2-2. MODULE COMMUNICATION SPECIFICATION ............................................................................................. 4
2-3. MODULE WIRING (RS-485 COMMUNICATION OPTION) ............................................................................. 5
2-3-1. Wiring method ................................................................................................................................ 5
2-3-2. Connection terminal ....................................................................................................................... 5
2-3-3. Configuration diagram example .................................................................................................... 6
2-4. MODULE WIRING (RS-232C COMMUNICATION OPTION) .......................................................................... 8
2-4-1. Connection terminal ....................................................................................................................... 8
2-4-2. Configuration diagram example .................................................................................................... 8
3. MODBUS COMMUNICATION SPECIFICATION .................................................................................................... 9
3-1. COMMUNICATION PROCEDURE ................................................................................................................ 9
3-2. TRANSMISSION SWITCHING TIME ............................................................................................................ 9
3-3. MESSAGE ............................................................................................................................................... 10
3-3-1. Composition of messages ............................................................................................................. 10
3-3-2. Message Contents ......................................................................................................................... 10
3-3-3. Types of data ................................................................................................................................. 10
3-3-4. Slave ID ......................................................................................................................................... 10
3-3-5. Function code ................................................................................................................................. 11
3-3-6. Format Details ............................................................................................................................... 11
3-4. ERROR DETECTION ................................................................................................................................ 17
3-4-1. CRC-16 .......................................................................................................................................... 17
3-4-2. Calculation of CRC-16 .................................................................................................................. 17
3-5. ERROR MESSAGE ................................................................................................................................... 20
4. COMMUNICATION EXAMPLE .......................................................................................................... 21
4-1. WPMZ-5/6 ............................................................................................................................................ 21
4-1-1. Acquire measurement data .......................................................................................................... 21
4-1-2. Change control parameters .......................................................................................................... 22
4-1-3. Change setting parameters .......................................................................................................... 23
5. ADDRESS MAP .................................................................................................................................... 26
5-1. WPMZ-5/6 ............................................................................................................................................ 26
5-1-1. Setting and control parameters ................................................................................................... 26
5-1-2. Measurement data...................................................................................................................... 105
6. TROUBLESHOOTING........................................................................................................................ 108
6-1. ABOUT COMMUNICATION ..................................................................................................................... 108
6-1-1. Communication abnormal .......................................................................................................... 108
6-1-2. The acquired data is abnormal .................................................................................................. 108
Modbus is a registered trademark of Modicon Inc. (AEG Schneider Automation International S.A.S.).