Exception Codes - ABB FSCA-01 Manual

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Exception codes

The FSCA-01 RS-485 Adapter Module supports the Modbus
exception codes shown below.
Exception code
Communication
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 not 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 slave is engaged in processing
a long-duration command. The
master should retransmit the
message later when the server is
free.