NI supports several industrial protocols directly with our OPC server CD. http://sine.ni.com/apps/we/nioc.vp?cid=11127&lang=US There are other protocols that are not directly supported by these tools. For additional protocols, including LonWorks and BACnet, there are other vendors that provide OPC servers. LabVIEW is an OPC client and can attach to these device servers. A place to look for Lonworks OPC servers is http://www.opcfoundation.org/05_products/05_search-results.asp
Good Luck, Preston Johnson National Instruments Industrial Measurements and Control
