Software redundancy: How can peripherals be coupled?

Hello SIOS Forum Community,

In order to be able to use software redundancy sensibly, the periphery must be coupled with a decentralised station. Otherwise, when connecting to central modules, the module would no longer have a process coupling if the CPU failed.

The ET200M with active backplane bus in the extended configuration (IM 153-2) can be used for coupling the periphery.

Only Profibus can be used as the peripheral bus system.

Within the ET200M station, any S7-300 digital and analogue module can be used.

In addition, the CP341 and the FM350-1 (counter module) can be used.

A list with the exact details of the modules can be found here:

https://support.industry.siemens.com/cs/ww/en/view/42614519

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