INVT Goodrive300-21 Series Operation Manual page 97

Goodrive300-21 series dual inverter integrated machine for air compressor
Code Name
protection
The slave uses functional code fields and fault addresses to indicate it is a normal response or some
error occurs (named as objection response). For normal responses, the slave shows corresponding
function codes, digital address or sub-function codes as the response. For objection responses, the
slave returns a code which equals the normal code, but the first byte is logic 1.
For example: when the master sends a message to the slave, requiring it to read a group of address
data of the inverter function codes, there will be following function codes:
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 order.
without password unlocking, it will report that the system is locked.
0 0 0 0 0 0 1 1 (Hex 03H)
1 0 0 0 0 0 1 1 (Hex 83H)
Meaning
- -
94
Appendix C