I have a digital output on an XA2 (MD4-7 controller) that showed orange in IQAN Design 4.07.7.4605 and indicated open load. This was good to me as I was troubleshooting some odd problems. I added some functionality to the project basically saying if I am commanding the output but it is not true shut my machine down. The problem is once I did this I disconnected the solenoid (unplugged din connector with built in led) to test my logic and it didn't show open load as I thought it would. with the din connector disconnected I cycled power to my MD4 multiple time and tried to recreate "open load" again and could not. I checked all wiring and the coil resistance and everything looks good.
I also am not getting an intermittent no contact on that particular XA2 module which I was not getting before the program update. This particular program has 5 XA2's. Also the system ran for about 600 hours with out issues.
Any ideas would be a great help.
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