Hi dears hope all are fine.

I have a question.

I have a Logo plc controlling level of a tank.

I want to add a backup logo plc of same model for purpose let my plc1 fail, control automatically shifted to plc2.

please help me what should I made changes in program or other hardware changes to complete my target.

I have logo plcs with part number

6ed1 052-1md00-0ba6

waiting for kind response

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Split from LOGO to LOGO analog network (NAQ/NAI).

Hello amanataliturk,

To do this, Logo 2 must first know that Logo 1 has failed. The switching of analog inputs and especially the outputs must then be implemented with relays. But if you want to set up your control system redundantly, what about the level sensors?

Greetings Ella_68

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