INVT GD20-0R4G-2-UL, Руководство по эксплуатации

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Goodrive20-UL Series VFD Communication protocol
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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 VFD (P00.01, parameter address is
0001H) with the address of 01H to 03, the command is as following:
VFD
address
Write
command
Parameters
address
Parameters
data
CRC check
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 VFD will return fault response message as below:
VFD
address
CRC check Fault code
Abnormal
response code
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
parameter setting in parameter writing is invalid. For example, the function input terminal
cannot be set repeatedly.
7.5 Read/Write operation example
7.5.1 Examples of reading command 03H
Read the state word 1 of the VFD with the address of 01H (see section 7.4.2 "Description of
other function addresses in Modbus"). The parameter address of the state word 1 of the VFD
is 2100H.
The command sent to the VFD:
Read
command
VFD
address
CRC check
Parameters
address
Data number
If the response message is as below:
Read
command
Data
number
Data content
CRC check
VFD
address
The data content is 0003H. From the table 1, the VFD stops.
Watch "the current fault type" to "the previous 5 times fault type" of the VFD through
commands, the corresponding function code is P07.27
–P07.32 and corresponding parameter
address is 071BH
–
0720H (there are 6 from 071BH).