INVT Goodrive300-01A Series Operation Manual page 170

Goodrive300-01A series VFD for air compressor
For normal responses, the slave responds the same codes, while for objection responses, it will
return:
Besides the function codes modification for the objection fault, the slave will respond a byte of
abnormal code which defines the error reason.
When the master receives the response for the objection, in a typical processing, it will send the
message again or modify the corresponding command.
0 0 0 0 0 0 1 1 (Hex 03H)
1 0 0 0 0 0 1 1 (Hex 83H)
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Communication protocol