8.4
MS-2102
Chapter 8 Communications
transmission.
When a MS-2102 module detects an error other than a
framing, format, overrun or CRC error, a response will be
sent to the master. The most significant bit of the FUNC-
TION CODE byte will be set to 1 (that is the function
code sent from the slave will be equal to the function
code sent from the master plus 128). The byte that follows
it will be an exception code indicating the type of error
that occurred.
The slave response to an error (other than CRC error) will
be:
The MS-2102 implements the following exception re-
sponse codes.
01 - ILLEGAL FUNCTION
The function code transmitted by the master is not one of
the functions supported by MS-2102.
02 - ILLEGAL MEMORY LOCATION INDEX
The index transmitted by the master is not allowable.
08 - ILLEGAL ADDRESS ENABLE DIP SWITCH
POSITION
The address enable dip switch on MS-2102 controller is in
the wrong position
Modbus Memory Map
Upon request, the Modbus Memory Map can be sent to
customers from factory.
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