CAN can not see PDP

[rakosi2]

Before I updated the RoboRIO, I was able to see the Power Distribution Panel in the dashboard. After I flashed the firmware and Imaged the RoboRIO to the 2016 game, the PDP disappeared from the dashboard. I am still able to see the PCM in the dashboard and I am still able to see the battery voltage in the driver station.
I have tried to reflash the RoboRIO and flashed our other RoboRIO with the same results.

[ozrien]

What are the LEDs on the PDP doing?

[homerun33ss]

Did you make sure that every CAN wire was terminated into something? I had a similar problem before, where I couldn't see a couple of our Talon SRX's on the dashboard. The issue ended up being that I had a CAN cable plugged into one of the two ports in the PDB, but not attached to anything else on the other end.

[rakosi2]

I have CAN wire go from the RoboRIO to the PCM to the PDP witch has the terminating resistor. I was able to see the PDP before I flashed and afterwards it disappeared from the dashboard but still able to see data in driver station. RoboRIO1's PDP just flashes green and RoboRIO2's PDP flashes orange.

[ozrien]

PDP disappeared from the dashboard.

You mean the web-based roboRIO configuration page?

But if the RIO was reset and the browser was not manually refreshed, the silverlight plugin won't match CAN devices to the treeview on the left correctly.

Can you just try a simple power cycle of the robot, and cleanly close/reopen the browser?

If the PDP is not red, then it has healthy CAN.

Battery voltage in the DS comes from the RIO, not the PDP, so that shouldn't be used as a clue for PDP.

[ozrien]

To rule out wiring, a simple sanity check would be to just plug a yellow/green cable from the RIO CAN BUS port right to the PDP's CAN Bus Port.

Then power boot and open a fresh web-based config page.

[rakosi2]

I have two test beds one with CAN going from RoboRIO to PCM to PDP and I can only see the PCM and another test bed with just CAN going from RoboRIO to PDP. This same issue is happening to two different RoboRIOs

[ozrien]

On the PDP that is connected to the roboRIO directly (no PCM), disconnect CAN and confirm the PDP LEDs change to blink-red-only. Then reconnect the CAN wires to the PDP to confirm it transitions back to blink-green-only (or blink-orange-only due to sticky fault).

Be sure to clear the column filter on the left above the treeview.

Make sure jumper on PDP is on the TERM. ON position.

Follow the cable from the RIO to the PDP to ensure CANH goes to CANH and CANL to CANL.

Sanity check: the PDP was flashed with 1.40 and the RIO was flashed with image19?

[rakosi2]

Green goes to green and yellow goes to yellow. While we were talking, the PCM also disappeared. When I disconnected a CAN wire, it did turn red and when I plugged it back in it turned orange. I do not know what firmware the PDP is because I can not access it. The TERM jumper is on ON.
http://i.snag.gy/0elGY.jpg

[ozrien]

Seems like there is something fundamental that is wrong. 2 RIOs and PDP and PCM are misbehaving? Maybe there is something going on with the actual wires.

Try this, grab two clean/prestine new wires, cleanly strip them, insert into the RIO and PDP's weidumuller connector. Be sure to press down on the white button before inserting the wire. Tug-test them by pulling on the insulation and make sure the wire doesn't pull out (doesn't require too much effort)


Video on inserting wire: https://youtu.be/kCcDw3lDYis
Source from: https://wpilib.screenstepslive.com/s...control-system

Maybe a photo of the wiring between RIO and PDP will reveal something obvious?

[rakosi2]

Here is a picture https://goo.gl/photos/Lj2NTgJo9ihDbbcs8. I used a new CAN wire from the KOP and still did not work. When I restored the image from 2015, CAN worked.

[rakosi2]

md5: FRC_roboRIO_2016_v19.zip 71641743A49F10B8FB61CFDD1A8FDF29