TimothyMoulder
Member
Well, not exactly, but not too far off the mark, either...
We've got two machines that run SteepleChase Visual Logic Controller...how I hate them... but that's not important right now...
On one of these machines, DeviceNet (implemented with an SST brand 5136-DN-ISA scanner card) will periodically crash. Boom, all communications lost. VLC does not realize this, and begins faulting out for other things related to I/O, like time-outs. If I had a nickel for every time I've been told, "It's got ten different faults, all at once! We have to check all of them!"...
Ahem.
So devicenet is crashing. Now, we've already changed the scanner card, but the problem remains. First surfaced about 8 weeks ago as a minor nuisance, than increasing in frequency to major-pain-in-the-tush status. Monitored the bus power supply, but couldn't find an intermittent on it (which is not to say it isn't there, I have doubts about my tester's reaction time to transients).
Question 1 : Has anybody sufferred mysterious complete network collapses on Devicenet, and what did you find? I don't care if it was a mouse (the furry sort) nesting in the wiring, I'm dying here. Need ideas on where to look.
Question 2 : I have a second DeviceNet card configured to monitor activity on the network. The thing is, I don't know what I'm looking at. I have a histogram of network usage (is 65% excessive for 8 nodes?) and a node-by-node breakdown of real-time usage, and some other stuff that might be useful (hey, I only got it running an hour ago ). Any information would be helpful, and I do mean any.
This is probably not enough data for our Grand-Masters to go on, but I'm not sure what to look for here, so if you'd like me to check something specific, lemme know and I shall get me hance and probe the little... ahem...
Thanks!
TM
We've got two machines that run SteepleChase Visual Logic Controller...how I hate them... but that's not important right now...
On one of these machines, DeviceNet (implemented with an SST brand 5136-DN-ISA scanner card) will periodically crash. Boom, all communications lost. VLC does not realize this, and begins faulting out for other things related to I/O, like time-outs. If I had a nickel for every time I've been told, "It's got ten different faults, all at once! We have to check all of them!"...
Ahem.
So devicenet is crashing. Now, we've already changed the scanner card, but the problem remains. First surfaced about 8 weeks ago as a minor nuisance, than increasing in frequency to major-pain-in-the-tush status. Monitored the bus power supply, but couldn't find an intermittent on it (which is not to say it isn't there, I have doubts about my tester's reaction time to transients).
Question 1 : Has anybody sufferred mysterious complete network collapses on Devicenet, and what did you find? I don't care if it was a mouse (the furry sort) nesting in the wiring, I'm dying here. Need ideas on where to look.
Question 2 : I have a second DeviceNet card configured to monitor activity on the network. The thing is, I don't know what I'm looking at. I have a histogram of network usage (is 65% excessive for 8 nodes?) and a node-by-node breakdown of real-time usage, and some other stuff that might be useful (hey, I only got it running an hour ago ). Any information would be helpful, and I do mean any.
This is probably not enough data for our Grand-Masters to go on, but I'm not sure what to look for here, so if you'd like me to check something specific, lemme know and I shall get me hance and probe the little... ahem...
Thanks!
TM