Omron CS1W-ETN21 - Echo back test

MANUEL STA46 Modbus TCP
JP Viskovic 30/08/2005 OEE-F 12
1-4-6 Echo back test
[Function]
Executes echo back test. Sending data is returned.
[Request]
Length Data
Function Code 1 Byte
0x08
Sub-function Code 2 Bytes 0x0000
Data N x 2 Bytes (*) ---
(*)2 to 125.(0x0002 to 0x007D) Bytes
[Response]
Length Data
Function Code 1 Byte
0x08
Sub-function Code 2 Bytes 0x0000
Data N x 2 Bytes (*) ---
(*) Same as request data.
Example: sending 0xA537.
Request Response
Data Data
Function Code 0x06 Function Code 0x06
Sub-function Code(H) 0x00 Sub-function Code(H) 0x00
Sub-function Code(L) 0x00 Sub-function Code(L) 0x00
Data(H) 0xA5 Data(H) 0xA5
Data(L) 0x37 Data(L) 0x37