Communication CAN-CAN LS

[Sepp 668]

Is it possible communication from an High Speed CAN to a Low Speed CAN? I have a circuit whith two transciever (pca82c250 and tja1054), the baud rate is setted to 50000. CAN LS receives the correct frame from CAN H, but CAN doesn't recognize the acknowledgment bit. How can I solve this problem? CAN LS goes in overflow error because CAN H continues to transmit.

[tstelzer]

Yes, it is possible to communicate between a High-Speed CAN interface and a Low-Speed CAN interface. You must make sure that you follow the "Cabling Requirements for Low-Speed CAN" from the NI-CAN User Manual. This involves using a cable with no termination between the differential CAN_H and CAN_L signals, and keeping the baud rate below 125k.

Also refer to the following KnowledgeBase entry:
http://ae.natinst.com/operations/ae/public.nsf/fca7838c4500dc10862567a100753500/cc16bd0069906a8686256a94005a6ab0?OpenDocument