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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.).
