I have a DHRIO module in a controllogix bridge. This was connected via Channel A to an old PLC5 and I had Channel B connected to a SLC. The system worked fine for a while. We moved the bridge and removed the PLC 5 and now I cannot see the SLC. I have verified the cable pull, connections, and terminating resistor (150 ohm). I have pulled the card trying to reset with no results. I have tried to move slots in the rack, but I get a configuration error until I put it back in its origional slot. Is there some configuration I am missing on the card?