Writing Command Examples - Chauvin Arnoux ULYS FLEX Modbus Notice De Fonctionnement

6. WRITING COMMAND EXAMPLES

In this chapter, some writing command examples are described.
These tables refer to a master-slave communication in MODBUS RTU.
Values contained in Command, Query and Response messages are in hex format.
WIRING MODE SETUP
Command example: 0110203C000204000000032E29
Example Byte Description
01 - Slave address
10 - Function code
20 High
Starting register
3C Low
00 High
2 words to be written
02 Low
04 - 4 data bytes
00 High
00 Low
Set 1 phase wiring mode
00
High
03 Low
2E High
CRC
29 Low
Response example: 0110203C0002048A
Example Byte Description
01 - Slave address
10 - Function code
20 High
Starting register
3C Low
00 High
2 written words
02 Low
04
High
CRC
8A Low
DATE&TIME SETUP
Command example: 0110204A000204522E5FD43FA7
Example Byte Description
01 - Slave address
10 - Function code
20 High
Starting register
4A Low
00 High
2 words to be written
02 Low
04 - 4 data bytes
52 High
2E Low
Set 9
5F High
D4
Low
3F High
CRC
A7 Low
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September 2013, 23:55:00
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MODBUS RTU/ASCII