Common Communication Faults - INVT Goodrive270 Series Operation Manual

Goodrive270 series VFD for fan and pump
Note:
 Set the address (P14.00) of the VFD to 03.
 Set "Channel of running commands" (P00.01) to "Communication", and set "Communication
channel of running commands" (P00.02) to the Modbus communication channel.
 Click Send. If the line configuration and settings are correct, a response transmitted by the VFD is
received as follows:
03
VFD
address

9.5 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 adapter 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 resistor connected to 485 terminals on the terminal block of the VFD is set incorrectly.
06 20 00
Parameter
Write
address
command
-314-
00 01 42 28
Forward running
Communication protocol
CRC