Communication with Modbus
2CMC48001M0201 105 A43/A44
Revision: C User Manual
Error check (CRC), high byte
Error check (CRC), low byte
Response frame Using function code 6, the response frame is an echo of the request frame.
9.2.3.1 Exception Responses
General If an error should occur while processing a request, the meter gives an exception
response that contains an exception code.
Exception frame An exception frame has the following structure:
In the exception response the function code is set to the function code of the
request plus 0x80.
Exception codes The exception codes that are used are listed in the following table:
A function code that is not supported has
The requested register is outside the
The structure of a received message is
Processing the request fail due to an
internal error in the meter.