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Function is received. Exception code $02 is returned when a request referencing an Illegal Data Address is
received.
When an Exception Response occurs, the function code of the response is $80 added to the original function
code (e.g. Improper use of function code $01 will result in the exception response $81)
An RIO-47xxx configured as a master can query the function code of the last response it received using the
_MW command (see command reference). The _MW command can be used to determine if an exception has
occurred. The _MW1 command (see the command reference) can be used to query the exception code.
16 Chapter 3 Communication
RIO-47xxx