Hello Cookstar,
Are you using the PCMCIA-485? which FieldPoint controller are you using and which modules do you have on it? How is your system configured? You can find very good answers in National Instruments' KnowledgeBase database. For your convenience, the following link might be very helpful in your situation: http://digital.ni.com/public.nsf/websearch/DF02F9489CE694AD86256A19006FFF3F?OpenDocument . Let me know.
Serges Lemo
Applications Engineer
National Instruments