I identified the issue with CAN. One of the jumpers that was meant to be shorting pins in order to get 120ohm resistance at each end was broken. I have no idea how a jumper could be broken, but it was, so we didn't have correct resistance on the lines. After replacing the jumper everything worked perfectly.
I identified the issue with CAN. One of the jumpers that was meant to be shorting pins in order to get 120ohm resistance at each end was broken. I have no idea how a jumper could be broken, but it was, so we didn't have correct resistance on the lines. After replacing the jumper everything worked perfectly.