Common Communication Faults - INVT Goodrive10 Series Operation Manual

Goodrive10 Series Mini VFD
03
VFD
address
If the operation is successful, the response may be as below (the same with the command
sent by the master):
03
VFD
address
Note: The blank in the above command is for illustration. The blank cannot be added in the
actual application unless the upper monitor can automatically remove the blank.

7.4 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.
06 00 03
Write Parameter
command address
06 00 03
Write Parameter
command address
27 10
Parameter
data
27 10
Parameter
data
-102-
Communication protocol
62 14
CRC check
62 14
CRC check