INVT GD20-004G-2-EU, Руководство по эксплуатации

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Goodrive20-EU series VFD Communication protocol
139
The command sent to the VFD:
Continuous
writing
command
Parameters
address
Data
number
VFD
address
LRC
check
If the operation succeeds, the response message is as follows:
Continuous
writing
command
Parameters
address
Data
number
VFD
address
LRC
check
Note: the blank in the above command is for illustration. The blank cannot be added in the
actual application unless the upper monitor can remove the blank by themselves.
7.6 Common communication fault
Common communication faults: no response to the communication or the VFD returns
abnormal fault.
The possible reason for no response to the communication:
Selecting wrong serial interface, for example, if the converter is COM1, selecting COM2 during
the communication
The baud rate, digital bit, end bit and check bit are not the same with the VFD + and - of
RS485 are connected in reverse.
The 485 wire cap on the terminal board of the VFD is not plug in. the wire cap in behind the
terminal arrangement.