Goodrive20 Series VFD
Communication protocol
-143-
ASCII mode:
The command sent to the VFD:
Continuous
writing
command
Parameters
address
Data
number
VFD
address
LRC
check
If 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 faults
Common communication faults include the following:
No response is returned.
The VFD returns an exception response.
Possible causes of no response include the following:
The serial port is set incorrectly. For example, the converter uses the serial port COM1, but
COM2 is selected for the communication.
The settings of the baud rates, data bits, stop bits, and check bits are inconsistent with
those set on the VFD.
The positive pole (+) and negative pole (-) of the RS485 bus are connected reversely.
The RS485 wire cap on the terminal board of the VFD is not connected. This wire cap is at
the back of the terminal block.
Содержание GD20-004G-2
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