Omron PLC - Proface HMI Error message

[Jothiswarup]

Hello guys,

PLC - Omron CJ1G-CPU44H
Ethernet module - CJ1W-ETN21
IP address - 192.168.10.11

Proface HMI(1) - GP2500S
IP address - 192.168.10.51

Proface HMI(2) - GP2500S
IP address - 192.168.10.62

Only these three on the network. If I connect all three in the network and lets say I operate HMI with IP 51, I am getting PLC Com. Error(02:FE:32:000:011) on HMI with IP 62 and vice versa. Once I go offline with HMI with error and reconnect, the error goes away. With only one HMI, there is no error.

I checked cable, pinged IP addresses and got response. What could be the issue?

 

[Izabela]

Is this a new installation, or something existing that was working ok and now does not?

 

[Jothiswarup]

It is not working after the network architecture has been modified.

Initially there were two PLCs with two respective local HMIs (two individual systems with all 4 different IP address). The two PLCs from these two separate systems were also networked with another HMI with IP 62 but one PLC/electrical panel is decommissioned now. After this decomission, only one PLC is connected to a local HMI and another HMI with IP 62

 

[shahzeb]

why we ground the shield(in case of analog signal in system power) in panel ?