Quote:
Originally Posted by Mark McLeod
I've seen those symptoms on PD's that had shorts, both internal from swarf, and in other cases an intermittent external short (caused by movement of an arm pinching wires) connected to one of the regular wago pairs resulting in a brown out. They read 24v until a load (cRIO) was applied.
We identified the troublesome external circuit by pulling all the breakers, then reinserting them one-by-one until the voltage dipped.
The swarf we identified by opening it up and clean out loose metal shavings and dust.
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I'm going to butt in for a second here because I have a related question...
About 3 weeks ago we were doing a demo for one of our corporate sponsors, and the robot spontaneously stopped responding. The other night when we were troubleshooting (none of the technical people were at the demo) we found that the cRIO was not responding to anything whatsoever (none of the status lights lit up at all, including the power light). We checked the connections, nothing. We unplugged the wires and then used direct lines (no connectors) from the PDB to the cRIO, and nothing. We checked the battery, and it was fine. And then we used a multimeter to check the voltage on the 4-pin PDB connector, and found nothing. We checked inside the case for metal shavings, and there were none.
We have a 2 year old 8-slot FRC I cRIO.
Does this suggest that the cRIO is dead, or is there something I'm missing or something we're forgetting to do? And if it is dead, does anybody know what NI's policies are regarding repair or replacement of the FRC I?