Thank you everyone for the help! My initial problem was in the wiring. I forgot to add power into out0 in.

Working on PID tuning today so I will get to jump into the rest of the M commands.

@dc42 Yeah I had to set that board to a new ID but now everything is working. Thanks!

@dc42 Sorry I was being stupid and had the CAN cable in the ethernet port of the mainboard. This is solved

@dc42 OK, I tested all 3 cables that were working on a board blinking rapidly but I did not have any luck.

@dc42 The mainboard blinks once a second. One of the expansion board's diag lights is not blinking at all. The other 2 boards' lights are blinking rapidly.

I am running a Duet 3 6HC Mainboard with 3 Expansion boards. When I started it up today, all of the expansion boards did not have communication.

I had communication in the past though with the same cables. I also tried moving the connections to see if I could get communication to even one board but had no luck. I tried resetting the board as well but I would get 4 flashes or no communication to the main board for a firmware update.

Only thing I could think is that I upgraded to firmware 3.4 recently but even after the upgrade I had communication between the boards.

@jay_s_uk I am very sorry. You are right. Just added this and everything works now. Thank you!

@jay_s_uk I am running the DWC firmware for 3.4RC2 but I am looking for DWC 3.4RC2+2

@dc42 The motions for the lower case axises do work through gcode command line

@dc42 I didn't see the duet web control package in the dropbox link you sent.

@dc42 I am trying to run it through the Duet Web control dashboard. I updated the firmware but not the DWC. How would I go about that?