There is no way to get the IO Configuration (which module is in which slot) in RSLogix5, for any PLC-5. Although Rockwell, by now, should have gotten at least a simple "read processor" for setting up the I/O Config, the sad fact is that, for the PLC-5 (but not the SLC), it simple isn't needed. Yes, it's handy to set up the Analog BTW/BTR stuff, and see the details when you veiw the BTW/BTR blocks
But they haven't yet programmed it. Rocksoft is still missing several cards from the I/O config, as well, even though they are up to version 5.2 (or is it 5.3?).
Sorry, you'll just have to enter it by hand (if you feel the need to.) At least the card configuration info (stored in the BT or N file) comes up, so as long as you select "Yes, the Module has been configured", you'll see just exactly how.