Quote:
Originally Posted by Deetman
Send a private message to EricVanWyk here on CD to bring his attention to this post. He is VERY familiar with the digital sidecars and its various failure modes. |
Considering he helped design it...
That being said, a few questions (some elementary, but bear with me):
- Which encoders are you using? (I assume the E4P from USDigital, which is what's standard in the KoP)
- Is this behavior consistent no matter which DIO (technically, the term is GPIO
) pins are used? That is, it doesn't matter which pair of pins is connected to the encoder?
- Have you double checked the encoder wiring setup? (i.e. made sure each line is isolated and not shorting to something else, and that you have +5 to +5, A and B to GPIO, and GND to GND)
- Do other digital sensors work on the GPIO pins? (If you don't have any on hand, see if any other teams have spare photoelectric sensors that you could play with).
- You said the 5V power fails; I assume this means that the 5V light turns off while the 6V and BAT lights stay on? (note to Eric: p3 of the spec sheet seems to have the 6V and "Power Input good" labels reversed)
- What do you mean by bumper? The 9403 module (the 37-pin module that plugs into the cRIO)? Something tells me that you're not plugging the DB37 into your bumper...
- Since the only remaining common at this point is the cRIO port, have you tried using a different slot for the module? Although the cRIO probably isn't your point of failure, replacing everything else does nothing else, soo...
- When you replaced parts, did you restore the original after finding that the replacement didn't fix the problem? (If a replacement has a problem, it introduces another problem to the system that you're likely to not notice, because fixing the original problem won't fix the system).