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21.8.1 Modbus Error Messages
The table shows common errors encountered when commissioning a VC-8000 Modbus
communications link.
Illegal data address
Rack does not allow writing to the register. Enable Allow
Status Register Writes in the SAM configuration.
See section 21.3.7
The rack does not respond.
Table 21-8) Modbus communication - error messages
When you import the CSV file into the MPS software, you may encounter the following error
messages.
Exception Response Possible solution
Row 133. The Modbus address 30,001
cannot have a value width of 1.
30,001 is a read coils register 0x30,001. ‘Data Format’
value (Column L) cannot be “32 bit floating point”, or “16
bit unsigned integer”.
Change the address to 300,001
Row 156. Conflicting address between…
You have overlapping or duplicate addresses.
Table 21-9) Modbus communication - error messages
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