Hold the last input state in S7 400 H CPU when ET200M (IM153-4) power failure?

hello every one,

is it possible to hold the last input state in S7 400 H CPU when ET200M (IM153-4) power failure?

(i.e) if, i not receive the empty level form level switch when ET200M alive but  then the module got power failure i receive empty level . but in actual the silo is not empty because of ET200M power failure it come .

thanks,

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Split from Question - How to detect a modul failer of an ET200M within the DP-Master.

hi,

I don´t think that the Inputs hold their last state in when there is a power failure. 

A workaround could be to read out the Inputs, and write it to a DB. In case of a failure on the device, don´t read out and don´t write to the DB. so the Input states would be saved.

hope this helps,

regards,