B-8 W650 Wind Generator Protection System GEK-113032A
B.2 MODBUS W650 APPENDIX B
B
B.2.7 EXCEPTIONS AND ERROR RESPONDS
The following table shows error codes defined in ModBus protocol:
01 ILLEGAL FUNCTION The slave does not support any function with the received function code in this message.
02 ILLEGAL DATA ADDRESS Master is trying to perform an operation in an incorrect address.
03 ILLEGAL DATA VALUE Slave has detected that the value sent by the master is not valid.
04 ILLEGAL RESPONSE LENGTH Indicates that a response to the master’s request would exceed the maximum specified size for
that function code.
05 ACKNOWLEDGE Generic acknowledgement.
06 SLAVE DEVICE BUSY Slave is busy and cannot perform the requested operation.
07 NEGATIVE ACKNOWLEDGE Negative acknowledgement.
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