schmitt,
At this time there are no CANopen VIs available from National Instruments. It is likely possible, with a very good understanding of the CANopen protocol, to write your own. The following tutorial hints at the possiblity:
http://zone.ni.com/devzone/conceptd.nsf/webmain/7a542c58102774db8625680700606293?OpenDocument
It may be wise to conduct an internet search to see if any third-party companies have released anything.
Craig H.
NI Applications Engineering