junhui90
Member
currently we use 2 CJ2H PLC to do software redundant and link to one hmi.
PLC 1 address(primary): 192.168.2.1
PLC 2 address(secondary): 192.168.2.2
HMI address : 192.168.2.10
The HMI only can write the data to PLC 1(192.168.2.1) and if plc 1 change to standby and plc 2 become duty. Then HMI unable to write the data to plc2(192.168.2.2) as the hmi only able write data to plc1.
Any matter I can let the PLC auto change the IP address when it is duty?
example: if plc 2 duty, then ip address from 192.168.2.2 change to 192.168.2.1
and plc 1 standby the ip address from 192.168.2.1 change to 192.168.2.2
PLC 1 address(primary): 192.168.2.1
PLC 2 address(secondary): 192.168.2.2
HMI address : 192.168.2.10
The HMI only can write the data to PLC 1(192.168.2.1) and if plc 1 change to standby and plc 2 become duty. Then HMI unable to write the data to plc2(192.168.2.2) as the hmi only able write data to plc1.
Any matter I can let the PLC auto change the IP address when it is duty?
example: if plc 2 duty, then ip address from 192.168.2.2 change to 192.168.2.1
and plc 1 standby the ip address from 192.168.2.1 change to 192.168.2.2
