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Unread 01-21-2011, 07:06 PM
jhersh jhersh is offline
National Instruments
AKA: Joe Hershberger
FRC #2468 (Appreciate)
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Re: Consistent CANTimeoutException via CAN-serial interface

Quote:
Originally Posted by MattG_3165 View Post
OK, looks like it was a signal/noise issue - we are using 6-conductor flat cable for our serial link. Your comment about the 115200bps connection got us thinking about noise, so we shortened our serial cable from six feet down to 2 feet, and now we have our first successful serial connection from the cRIO to the Jag.

Maybe we'll switch our cabling to twisted pair in the future.

Thanks!
Another option that will probably help is placing the CAN terminator in the RJ instead of the DB9. This way the center 2 conductors are not connected in the cable. It's harder to manufacture but it prevents the CAN bus from running along side the serial signals.

-Joe
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