Technically, you do not need any software for a FieldPoint system with a FP-1000 or FP-1001 controller as the communication protocol is published in the FP-1000/1001 Programmers Reference Manual. The FP-1000/1001 Programmers Reference Manual can be downloaded here: http://digital.ni.com/manuals.nsf/websearch/EE241C7357D3F8CE862567840072F554?OpenDocument&node=132100_US .
However, practically, there is no reason to re-invent the wheel and rebuild a user interface/driver software when it already exists. You will want to download the NI-FieldPoint driver software from here: http://digital.ni.com/softlib.nsf/webcategories/85256410006C055586256BBB002C0E29?opendocument&node=132060_US . The driver software provides an OPC Server and drivers for both LabVIEW and Me
asurement Studio. If you want to program in a different language, you will need to use OPC Client software to speak to the OPC Server.
Regards,
Aaron
LabVIEW Champion, CLA, CPI