thingstodo
Member
I'm trying to use some old hardware - a 1771-IF analog card and a 1771-IK encoder card - with a PLC 5/60. Do these cards only work in 2 slot addressing? If that's not it, what am I missing?
I have a 16 slot rack set up as Rack 0 and Rack 1. This is single slot addressing and I am having a problem getting the IF and IK to work. These are all ebay items (PLC, IK, IF) but I have the PLC working with 1771-IBD and 1771-IAD input cards and 1771-OBD and 1771-OAD output cards as well as a 1771-OFE2 analog output card. The IF responds to the BTR with a done bit, but the data contents are not correct (all 0). The IK is set up as IO scan only so I don't have a BTR and BTW - I need the encoder input to show up and don't need the outputs or counting functions. The IK has the MSB set in the output word - control word 'mode' selected. All other control bits are 0.
I've done the usual flip of the dip switches on the card to the opposite position and back to make sure that they are seating well.
I've checked that the rack works - IBD and OBD cards in each slot. I purchased spares for each of the cards and the OFE2s, IBDs, OBDs, IADs and OADs all appear to work in every slot.
The IF has some tight specs on the power supply, so I thought I was just not feeding the correct voltages in, so after changing out the IF with a spare and getting the same results I switched to working on the IK. The IK has much simpler requirements for voltage. But it doesn't work, either. The spare does not work, either.
My next guess is the 2 slot addressing (which will mess up my planned IO map) but I don't see why single slot addressing won't work. The manuals don't mention addressing, so I've ASSUMED that it does not matter. I am wondering if 2 slot addressing was the 'Norm' for PLC2 and it just didn't occur to anyone that it needed to be specified.
I've searched the archives with the 'free' search and can't find an answer - I apologize if that has been discussed already - I did TRY to search.
I have a 16 slot rack set up as Rack 0 and Rack 1. This is single slot addressing and I am having a problem getting the IF and IK to work. These are all ebay items (PLC, IK, IF) but I have the PLC working with 1771-IBD and 1771-IAD input cards and 1771-OBD and 1771-OAD output cards as well as a 1771-OFE2 analog output card. The IF responds to the BTR with a done bit, but the data contents are not correct (all 0). The IK is set up as IO scan only so I don't have a BTR and BTW - I need the encoder input to show up and don't need the outputs or counting functions. The IK has the MSB set in the output word - control word 'mode' selected. All other control bits are 0.
I've done the usual flip of the dip switches on the card to the opposite position and back to make sure that they are seating well.
I've checked that the rack works - IBD and OBD cards in each slot. I purchased spares for each of the cards and the OFE2s, IBDs, OBDs, IADs and OADs all appear to work in every slot.
The IF has some tight specs on the power supply, so I thought I was just not feeding the correct voltages in, so after changing out the IF with a spare and getting the same results I switched to working on the IK. The IK has much simpler requirements for voltage. But it doesn't work, either. The spare does not work, either.
My next guess is the 2 slot addressing (which will mess up my planned IO map) but I don't see why single slot addressing won't work. The manuals don't mention addressing, so I've ASSUMED that it does not matter. I am wondering if 2 slot addressing was the 'Norm' for PLC2 and it just didn't occur to anyone that it needed to be specified.
I've searched the archives with the 'free' search and can't find an answer - I apologize if that has been discussed already - I did TRY to search.