KB86512
Published: May 1, 2019
Revision: 2.0

SNAP-SCM-CAN2B buffer overruns may occur at baud rates higher than 250 kbps


Applies To:

SNAP-SCM-CAN2B

Versions Affected:

All versions prior to R2.0c

Resolved In Version:

R2.0c


Symptoms:

You can configure the SNAP-SCM-CAN2B serial communication module for several different baud rates. The default rate is 250 kbps (kilobits per second).

If CAN bus utilization is high and frame sizes are small, buffer overruns may occur at baud rates higher than 250 kbps. If this occurs, CAN frames may be dropped and the module may stop receiving frames.

Workaround:

If the module was manufactured before 11/2013, configure the SNAP-SCM-CAN2B for 250 kbps or less baud rate. Also configure other CAN devices attached to SNAP-SCM-CAN2B with the same baud rate.

If the module was manufactured after 11/2013, contact Opto 22 Product Support to get new module firmware.

Resolution:

Opto 22 has resolved this issue.

Questions?

Contact: Opto 22 Product Support.
Phone: 800-835-6786 or 951-695-3080
Email: support@opto22.com


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