INVT GD300-004G-4, Operation Manual

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Goodrive300 inverters Communication protocol
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Code Name Meaning
changed
during running
09H
Password
protection
When the upper monitor is writing or reading and the user
password is set without password unlocking, it will report that the
system is locked.
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:
0 0 0 0 0 0 1 1 (Hex 03H)
For normal responses, the slave responds the same codes, while for objection responses, it
will return:
1 0 0 0 0 0 1 1 (Hex 83H)
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.
For example, set the “running command channel” of the inverter (P00.01, parameter
address is 0001H) with the address of 01H to 03, the command is as following:
But the setting range of “running command channel” is 0~2, if it is set to 3, because the
number is beyond the range, the inverter will return fault response message as below:
Abnormal response code 86H means the abnormal response to writing command 06H; the
fault code is 04H. In the table above, its name is operation failed and its meaning is that the