Melsec iQ-R Redundant Systems – with Analog IO (DA and AD)


The following a summerized write-up on the implementation of a redundant Melsec iQ-R system. However, this PLC system is to accommodate Analog cards as well. (both DA and AD).

It is known that only Digital discrete IO can be added directly in conjunction with the redundant CPU. As such, in order to be able to accommodate such functionality with redundancy – will the following solution will suffice a as an implementation example; 

However, if redundancy on the network as well as the analogue IO is also required – then the following configuration can be considered;