Mitsubishi FX-1N/2N PLC connectivity with KepserverEX

Question

We have connected Mitsubishi FX1N, 2N, 3G and Omron PLC to the KEPServerEX using respective drivers through ethernet encapsulation mode and all PLCs are communicating with KEPServerEX as expected. However, we are facing the issue in Mitsubishi FX1N PLC when connected to KEPServerEX using the driver Mitsubishi FX through physical medium as ethernet encapsulation. Ethernet encapsulation is performed through MOXA Nport (TCP server Mode).

Observation

1) The communication between KEPServerEX and FX1N PLC is success and can be able to read PLC register data as expected.

2) But whenever PLC get power restarted, observed abnormal/random values in PLC registers (Only in FX1N PLC).

3) If KEPServerEX connection removed then no such observations noticed in FX1N PLC

cmorehead · Accepted Answer

Adding link to Kepware document in regard to connecting to a FX1N PLC: Article - CS333162 - Communicating to Mitsubishi FX1N PLCs in PTC Kepware products

cmorehead · Answer

@HY_9760276

The server should retain the last known good value or reflect bad quality once the device time out settings in the device properties has been reached. I am not sure what you are seeing for random values. I recommend opening a support ticket with the Kepware team to troubleshoot your specific issue. By opening a ticket, the Kepware support team can take a closer look at your exact architecture and will allow for transference of files needed for advanced troubleshooting. Here is a link to the login page where a ticket can be logged:

Log In | My Kepware

Thanks,

*Chris

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