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For a new installation we are planning to use Allen-Bradley PLCs.
Our system will consist of a redundant ControlLogix5571 pair connected to a fiber optic ethernet ring (remote I/O racks).
The question I have is: how to link our redundant PLC pair to a third party PLC (also using Allen-Bradley).
For "political" reasons, it is not allowed to have the third party in our fiber optic ring.
It was decided there will be a single (non-redundant) ethernet connection running from our system to the customer's PLC.
Now if it was a single (non-redundant) setup, one would probably just add a communications processor (network card) to the CPU-rack and that would be it.
However, what to do in case of a redundant CPU pair?
Is there a way both CPUs can share the single ethernet link to the third party?
Our system will consist of a redundant ControlLogix5571 pair connected to a fiber optic ethernet ring (remote I/O racks).
The question I have is: how to link our redundant PLC pair to a third party PLC (also using Allen-Bradley).
For "political" reasons, it is not allowed to have the third party in our fiber optic ring.
It was decided there will be a single (non-redundant) ethernet connection running from our system to the customer's PLC.
Now if it was a single (non-redundant) setup, one would probably just add a communications processor (network card) to the CPU-rack and that would be it.
However, what to do in case of a redundant CPU pair?
Is there a way both CPUs can share the single ethernet link to the third party?