Hello Candyengineer,

Nice toread your thread . Hope everything is fine.

As Sulung said, hardware redundancy means H system and nothing else.

I just have some remarks regarding your software redundancy configuration.

In your 2nd RAY you use CP 342-5 and CP 343-1.
I'm afraid this is not possible.
You can use CP 342-2, CP 340 & CP 341 behindET200M however the only statedCP in this listis CP 341.
So CP 343-1 and CP 342-5 will not work.

You should use CP343-1 (Lean is enough) behind each CPU to communicate with PC.

You can use the MPI ports for communication with PC (You will need CP5611) but I believe you are using MPI as a redundant link, isn't it?

If this is the case then leave the MPI to be just a redundant link.
Just take care because it's little bit slow. Profibus redundant link would be better.

To communicate with another PLC, I recommend to use the CP341.

Best regards.

H-H