Westermo MDI-112-F4G - Manual (Page 161)

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calculated value to the actual value it received in the CRC filed.
5.3.3 Exception Response
If an error occurs, the slave sends an exception response message to master
consisting of the slave address, function code, exception response code and error
check field. In an exception response, the slave sets the high-order bit (MSB) of the
response function code to one. The exception response codes are listed below.
Code Name Descriptions
01 Illegal Function The message function received is not allowable
action.
02 Illegal Data Address The address referenced in the data field is not valid.
03 Illegal Data Value
The value referenced at the addressed device
location is no within range.
04 Slave Device Failure
An unrecoverable error occurred while the slave was
attempting to perform the requested action.
05 Acknowledge
The slave has accepted the request and processing
it, but a long duration of time will be required to do
so.
06 Slave Device Busy The slave is engaged in processing a long-duration
program command.
07 Negative Acknowledge
The slave cannot perform the program function
received in the query.
08 Memory Parity Error
The slave attempted to read extended memory, but
detected a parity error in the memory.
5.3.4 Modbus TCP/IP register table
The Managed Switch start support Modbus TCP/IP client service for the Factory
automation applications.
The command of Modbus only supports in the command line interface- console and
telnet mode that allows user to modify some parameters like as idle time, number of
Modbus master and Modbus service port.
Word Address
Data Type Description
System Information
0x0000 16 words Vender Name = “Westermo”
Word 0 Hi byte = ‘K’
Word 0 Lo byte = ‘o’
Word 1 Hi byte = ‘r’
Word 1 Lo byte = ‘e’
Word 2 Hi byte = ‘n’
Word 2 Lo byte = ‘I’