Using PLC 5/04 with two 1747SN RIO Adapters, Trying to see values on PanelView

Of course you can, M0/M1 can be up to 32000 in length.

Not sure about this, but you may need to be offline to do this, AND you may need to make a similar change to the PanelView. Perhaps someone else can advise, I'm not that well into SLC RIO.

Can you not do a Search for references to M0 and M1, (I don't think Cross-Reference is available for M0/M1). write down all the COPs and Lengths. You could probably build up a map of data usage this way.
 
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