DRV-28 inverter
s Communication protocol
-278-
•
No response is returned.
•
The inverter 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, end bits, and check bits are inconsistent with those set
on the inverter.
•
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 inverter is set incorrectly.
