Modbus
SECTION 5 Modbus Communications Procedure
5-22
(2) Response Code
(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.)
Function code Error code Name Description
H'88 H'03 Variable data error The data following the function code
was not the fixed data (H’00, H’00).
H'08 --- Normal completion No errors were found.
01 08 00 00 12 34 ED 7C(CRC-16)
01 08 00 00 12 34 ED 7C(CRC-16)
Command:
Response:
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