Omron SYSDRIVE RX Series User Manual page 250

4-4 Communication Function
Setting
RS485 communication requires the following settings.
Parameter No.
C071
C072
4
C073
C074
C075
C076
C077
C078 Communication wait time
C079
Related functions
Communication Test Mode
•The communication test mode allows you to check the RS485 communication line (hardware).
(Communication Test Mode Procedure)
(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:
•Normal:
•Abnormal:
(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.
4-141
Function name
02: Loop-back test
Communication speed 03: 2400 bps
selection 04: 4800 bps
(Baud rate selection) 05: 9600 bps
06: 19200 bps
1. to 32.: Allocate each Inverter's station No.
Communication station
Set station numbers to control several
No. selection
Inverters simultaneously.
Communication bit 7: 7 bits
length selection 8: 8 bits
00: No parity
Communication parity
01: Even
selection
02: Odd
Communication stop bit 1: 1 bit
selection 2: 2 bits
00: Trip
01: Trip after deceleration stop
Communication error
02: Ignore
selection
03: Free-run stop
04: Deceleration stop
Communication error 0.00 to 99.99: Communication
timeout disconnection judgment time
0. to 1000.: Time to wait for response from
the Inverter
Communication method 00: ASCII method
selection 01: ModBus-RTU method
A001, A002
lk_k_ko
lk_k_kz
Data Default setting Unit
⎯
04
⎯
1.
⎯
7
⎯
00
⎯
1
⎯
02
0.00 s
0. ms
⎯
01