Exception Codes - ABB FENA-01 Protocol Manual

Exception Codes

The FENA-01 supports the Modbus exception codes shown
below.
Exception Code Name
01h ILLEGAL FUNCTION
02h ILLEGAL DATA
ADDRESSS
03h ILLEGAL DATA VALUE
04h SLAVE DEVICE FAILURE
06h SLAVE DEVICE BUSY
Description
The function code received in the
query is not an allowable action for
the server.
The data address received in the
query is to an allowable address for
the server.
A value contained in the query data
field is not an allowable value for
the server.
An unrecoverable error occurred
while the server was attempting to
perform the requested action.
The server is engaged in
processing a long-duration
command. The client should
retransmit the message later when
the server is free.
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Communication