Convert PLC-5 controller to RIO scanner

[Beau 1]

We are in the middle of converting a process from PLC5 control to ControlLogix. Currently we are using messaging between the PLC5 processor and the ControlLogix processor to allow both processors to control the process. This allows us to periodically replace old RIO rack (and eventually the PLC5 processor) with Flex I/O without interrupting the process. I recently read that PLC5 processor can be configured as an RIO adapter.

Has anyone done this in a situation similar to that described above?

I am trying to decide whether or not to attempt this. Right now we are in a rush trying to convert everything and it would allow us to take our time retrofitting the Flex I/O units, but we cannot afford to have our process experience unscheduled downtime.