Omron E5CN-H Communications Manual page 101

SECTION 5 Modbus Communications Procedure
Function code
H'88
H'08
5-22
(2) Response Code
Error code Name
H'03 Variable data error
--- Normal completion
(3) Example Command and Response
The following example shows the command/response for an Echoback
Test command.
(In this case, the test data is H'1234.)
(In this case, the slave address is H'01.)
01 08 00 00 12 34 ED 7C(CRC-16)
Command:
Response:
01 08 00 00 12 34 ED 7C(CRC-16)
Description
The data following the function code
was not the fixed data (H'00, H'00).
No errors were found.