Annex 1: Modbus address and examples
46
Example of Communication
Example 1: read real-time value of analog input 1
Distributed date:
01 03 00 01 00 02 95 CB
Description:
01: instrument address (configuration can be changed)
03: Modbus 03 command
00 01: register address 3
00 02: Number of registers 2
95 BC: CRC check
Return data:
01 03 04 42 C8 00 00 6F B5
Description:
01: instrument address
03: Modbus 03 command
04: Return data four bytes
42 C8 00 00: Floating point(F4321, configuration can be changed), meaning
100.0
6F B5: CRC check