CAN BUS stops transmitting data after 30 min.

[MissyD]

Hi lvpro10,
I have some questions for you to troubleshoot this issue. What version of NI-CAN are you using? Are you using high speed or low speed CAN? What CAN cards do you have (Series 1 or Series 2)? Are you using the same cables and devices on the CAN bus for both the PXI and PCI system? Are you getting any error messages when it stops transmitting data?
Thanks!

[lvpro10]

Here is the deal, it was observed one time that the exact moment the screen saver kicked in the CAN transmissions stopped. So we disabled the screen saver and run the LV program that continously transmits CAN data for a couple of hours and the CAN transmissions stopped again. The next day I removed CAN 2.4 and installed CAN 2.3. I ran the LV program again for 7 hours this time and observed no CAN transmission stoppage. This CAN 2.4 version seems to only impact CAN PCI hardware, we have not seen this problem with the CAN PXI, but does not meqan that there is not a issue with the PXI hardware though. I have not tried CAN 2.5, nor do we have time in our schedule to test yet another version of the CAN driver at this time. Hopefully NI in Austin, Tx will do some testing here on this issue.