4�9�4� Example Of A Modbus Query - Circutor Computer SMART III FAST 12Vdc Instruction Manual

4�9�4� EXAMPLE OF A MODBUS QUERY
Query: Instantaneous value of the L1 phase voltage
Address: 0A, Peripheral number: 10 in decimal.
Function: 04, Read function.
Initial Log: 0000, log from which to start reading.
No� of logs: 0002, number of logs to be read.
CRC: 70B0, CRC character.
Response:
Address: 0A, Responding peripheral number: 10 in decimal.
Function: 04, Read function.
No� of bytes: 04, No. of bytes received.
Log: 0000084D, value of the L1 phase voltage: VL1 x 10 : 212.5V
CRC: 8621, CRC Character.
66
Address Function
0 A 04
Address Function No� of Bytes
0 A 04 04
Initial log No� of logs
0000 0002
Log no� 1 Log No� 2
0000 084D
Computer SMART III FAST 12Vdc
CRC
70B0
CRC
8621
Instruction Manual