Why does "stdios-Device ENTERS slow poll mode (MELSEC - Address )" occur?

[Koki_Okamoto]

Hello.

We are trying to communicate with Mitsubishi FX3UC and FX3GC using Flexy205.
We are using MELSEC for the IO server.
Recently, I get the following error and cannot read tags.
The status of the tag is No Communication.

Error: stdios-Device ENTERS slow poll mode (MELSEC - Address )

Flexy and PLC are directly connected by LAN cable and we have confirmed that the ping is successful.

What are the possible causes?

The IO server is configured as follows
FX3CPU,TCP,192.168.1.19,10001(FX3UC)
FX3CPU,TCP,192.168.1.20,10001(FX3GC)

Thank you.

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[kyle_HMS]

Have you followed the Mitsubishi PLC Application Note?

You may also want to reference this post:

Mitsubishi FX3 to eWon flexy

This is just to augment what has already been said. I successfully setup an eWon Flexy with a Mitsubishi FX3U through ENET and I wanted to let everyone know how we did it, through a little trial and error. We are still in development and testing phase, but were able to get it to read data consistently. Few things to note: we used the ENET card and not serial coms we found issues with X & Y & some others not consistently giving the data across and we just ended up bypassing this issue as…

If you continue to have problems, I would recommend creating a case at https://support.hms-networks.com where a local HMS representative will be able to help you more directly.

[Koki_Okamoto]

Thank you kyle.
The problem continues to occur, but it was helpful.
It sounds like there may be a problem with my network settings.
I’ll try that setting first!

Thank you for reading my poor English!
Please let me know if there is anything else I can do!

Koki.

[kyle_HMS]

You’re welcome Koki. Your English is actually really good!

If you continue to have problems, I would recommend creating the support case at support.hms-networks.com. We have an expert with these Mitsubishi PLCs who will be able to help you better than I, in this case.