IPE300 series engineering VFD Communication protocol
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Possible causes of no response include the following:
The serial port is set incorrectly. For example, the adapter uses the serial port COM1, but COM2
is selected for the communication.
The settings of the baud rates, data bits, end 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 resistor connected to 485 terminals on the terminal block of the VFD is set incorrectly.
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