Redundancy- hardwired I/o loss during download

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Dear Members,

I am trying to add i/o’module and/or Modbus Slave to the redundant set of controllers.
I am experiencing the hardwired i/o loss during download. Is there any way to prevent that?

Thanks and regards
Ashamdeep Singh Saini

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Hi Asham, I presume that the hardwired I/O’s were added to a PLK node – is that correct? It might be helpful to include a diagram of the topology and what you are trying to add.