Communication Test Mode - Omron 3G3RX User Manual

4-4 Communication Function
Parameter No.
C078
C079
Related functions
Communication Test Mode
•The communication test mode allows you to check the RS485 communication line (hardware).
(Communication Test Mode Procedure)
4
(1) Before conducting a loop-back test, disconnect the cable from TM2 on the control terminal block
board.
(2) Set the following parameter via the Digital Operator.
•Set C071 (communication speed selection) to "02" (loop-back test).
(3) Turn off the Inverter, and turn it on again. The check will start.
(4) After the check is complete, the Digital Operator displays the following code:
OK: LoopBack OK
NG: LoopBack NG
(5) Press the RESET button on the Digital Operator or on the copy unit to show the basic setting
screen. Reset the parameter that you changed in step (2) to a desired setting.
4-147
Function name
0 to 1000: Time to wait for response from the
Communication wait time
Inverter
Communication method 00: ASCII
selection 01: ModBus-RTU
A001, A002
Data Default setting Unit
0 ms

01