One option would be to use the
LabVIEW Datalogging and Supervisory Control Module. It's an OPC Client and has other features for such a montioring kind of applications.
Third party interface hardware and OPC Servers are available for Lonworks; search the Net. Here's an ISA interface card by Gesytech. They have an OPC Server to go with it:
http://www.gesytec.de/englisch/products/easylon/el_pc-interface.htm
Hope this helps.
Khalid 🙂