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DeltaV v11.3.1 Standby MD controller resets continuously.

Hello All,

I am facing an issue with my v11.3.1.2465.xr and MD controller rev 5.12, 5.17, 5.21 and MD+ rev 5.50. Error and Stby LED on my Stby controller keeps on blinking, all above HW works fine in simplex config. In error state PExist and RedEn says YES, Pavail says NO, Redundancy Status says Failed Component. Tried on multiple HW same findings. After some testing I have some findings that redundancy works perfect if there is no I/O configuration; but as soon as I configure any I/O module and download then Stby controller never comes back in sync state, stays in the limbo.

Got stuck as controller is of no use without I/O :-), any suggestions. Thanks.

BR,
Riz