I was searching for the answer then I got answer form somewhere that "It can be done as long as there is duty and standby plc this can be done"

Can you explain me how can I do that ?

 It seems that this feature isnt aviable in 1200 series, only in S7-300 and S7-400 series.

Check this already existing thread.

Is Redundancy Possible in S71200

AutoGen_626789

Hello experts,

I want to achive software redundancy with two 1200 plc.

how can I do this?

Because I've already seen somewhere that it is done by software somehow.

I was searching for the answer then I got answer form somewhere that "It can be done as long as there is duty and standby plc this can be done"

Can you explain me how can I do that ?