Exception Responses - ABB A43 User Manual

Communication with Modbus
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.
An exception frame has the following structure:
Exception frame
Slave Address
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:
Exception code
01
02
03
04
2CMC48001M0201
Revision: C
0x62
0xDE
Function Code Exception Code
Exception Definition
Illegal function A function code that is not supported has
been used.
Illegal data address The requested register is outside the
allowed range.
Illegal data value The structure of a received message is
incorrect.
Slave device failure Processing the request fail due to an
internal error in the meter.
105
Error Check
A43/A44
User Manual