Dear Everyone,

I am facing one issue occurring every week. The system is with S71200 1215, where this error says that,

“Error: IO device failure - Connection abort by IO device

Potential inhibit/break reason for next startup:

- Unacceptable configuration difference (wrong or missing component)”.

With an

event id:16# 02:39CB

The system contains four Schmersal SFB-PN-IRT -8M12-IOP RIO modules and Eight Schmersal BDF200-FB-NHK-LM-LM-LT-G24-2875 PB modules. In some moment one of 4 Schmersal SFB-PN-IRT -8M12-IOP RIO modules going in error state and in next 20 seconds all of them have same error: IO device failure - RPC application timeout.

The problem is that we cannot work with the machine until we solve the communication with the module. That's why we have to stop/start the PLC every time so that the network and communication with the module is stable.

For the troubleshooting even we have checked communication cables, power cables bur still remaining with the same issue.

Hope you can give me some hint!

Thank you in advance!

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Split from S7 1200 Error: IO station failure- /> HW_ID= 272 ........ Event ID 16#02:39CB.

Topic closed, because the question was posted twice. The active topic can be found here:

1200: Connection abort by IO device

Kind regards, Moderator_Lan