Reducing CAN network noise

[Mike Copioli]

Originally Posted by jwakeman

Tests I ran:
1. cRIO w/ 2CAN on metal frame with mess of wires (test rig)- glitched
2. CRIO w/ serial cable on test rig - glitched
3. Laptop w/ BDC-Comm to jags/motors on test rig - NO glitches
4. cRIO w/ 2CAN on cafeteria table - NO glitches


I did suspect the cRIO software/firmware and also the 2CAN first. Testing with the serial cable eliminated the 2CAN (still glitched). Testing with the cRIO on the table top and seeing no glitches made me suspect noise in the test rig we had been using.

When using the 2CAN are you observing CAN errors in the web dash? Also how many jags are you running? Could you please describe what you mean by "glitches" all jags or only one or two? Have you tested using only one or two jags on the bus? If so what was the result.

Your problem sounds more like poor connectivity/termination. Try reducing the number of Jags on the bus, then adding additional jags until the problem reproduces.