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Old June 18th, 2003, 01:42 AM   #1

ashley is offline
Join Date: Jun 2002
Location: Perth
Posts: 58
ControlLogix IO Card Fault

Please look at the attached RSLogix5000 screen capture.
I am checking for IO card fault in a remote ControlLogix chassis. I have another 8 similar rungs above rung 8 for checking the status of the remaining IO cards.
Will this logic give me an IO card fault if a card is pulled out of it's slot or if a card is missing, i.e. will tag XA_0139B be set?
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File Type: jpg iocardfault.jpg (102.6 KB, 101 views)
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Old June 18th, 2003, 01:58 AM   #2
Ken Roach
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Location: Seattle, WA
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Yes, that looks like a good way to check the FaultCode objects for all of the I/O modules in your system. You can use it for modules in the local chassis as well as on ControlNet or EtherNet/IP networks.

I'd condition the logic to run occasionally instead of every scan. That FBC takes up a little scan time and you don't need to run it any faster than necessary to check on the I/O modules.
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Old June 18th, 2003, 04:07 AM   #3

ashley is offline
Join Date: Jun 2002
Location: Perth
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Ken, I used this logic for checking IO card fault at one site. Didn't test the logic at that time. Later, the customer pulled out a couple of modules but says that he didn't get an IO card fault alarm. I need to go to site and check it.
My doubt is whether the fault code changes from 0 to some other value if a module is pulled out from its slot. Is a fault code generated if a module is not present in its slot?
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