Quote:
Originally Posted by linuxboy
I imagine the Digital Side Car not working is not a result of the CAN device dropping out, but rather, the error handling when a CAN device drops out is expensive and therefore watchdogs start tripping because loops aren't going fast enough and packets are processed quickly enough and suck.
Again, expensive error handling means the cRIO stops processing communication packets with the DS, and there for it "loses comms"
So, since the last Jag in line's other RJ-12 (RJ-45 is 8p8c I think, whereas the CAN plugs on the jaguars are 6P6C and 6P4C) port was bad, the terminator couldn't terminate, therefore it was like having no terminator. This wouldn't be an issue in a shorter chain since there isn't as much need for a terminator (I don't know why) but in a longer chain, it would cause timeout errors, and again, the error handling is expensive, so it would slow down the loop.
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Quote:
Originally Posted by 1075guy
While all this discussion of CAN is great, I know for a fact it is NOT the problem that 1114/2056 had on Einstein. They both exclusively use Victors.
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Trust me. I know that wasn't the issue. It also wasn't our issue at bayou because we got rid of everything on our robot besides motors and solenoids. All using PWM, relay, and solenoid outputs, no camera.
It's just a potential problem that can come up that isn't easily diagnosable. CAN errors shouldn't cause everything to shut down.