john paley
Member
I gets a processor fault on my slc5/04. So I goes in and look at the fault code--a minor fault has been set at the end of the scan, or whatever fault 20h says exactly. I've seen this fault before in other slc's and it was always some of my code causing a math overflow error. But this time--no math error--as a matter of fact, no s:5 bits are set--no minor error was set--or at least stayed set. Yet the 20h fault says" a minor bit was set at the end of the scan". Anybody ever seen that??
This fault occured twice--yesterday--but not since--in 24 hours. So I goes and ask the operator--What was the last thing that happened before the thing farted?? So he tells me I hit "line thread" then it stopped and gave me the unwind 5/04 farted alarm (not really a farted alarm, but a comms watchdog alarm). I follows the "line thread" trail, but nothing is different from before--can't overstuff the integers--this SLC has been in this application for more than 5 years without this kind of trouble. Why now??
So I puts a rung in at the end of file 2 to copy S:5 to an address and latch a bit if s:5 ain't equal to 0--just in case the minor bit is somehow healing itself after the fault--I can look at the other address and see what it was at just before the fault triggering "end of the scan". But it ain't faulted since.
Anybody got any ideas??
This fault occured twice--yesterday--but not since--in 24 hours. So I goes and ask the operator--What was the last thing that happened before the thing farted?? So he tells me I hit "line thread" then it stopped and gave me the unwind 5/04 farted alarm (not really a farted alarm, but a comms watchdog alarm). I follows the "line thread" trail, but nothing is different from before--can't overstuff the integers--this SLC has been in this application for more than 5 years without this kind of trouble. Why now??
So I puts a rung in at the end of file 2 to copy S:5 to an address and latch a bit if s:5 ain't equal to 0--just in case the minor bit is somehow healing itself after the fault--I can look at the other address and see what it was at just before the fault triggering "end of the scan". But it ain't faulted since.
Anybody got any ideas??