If you want to use a DataSocket server, you would need an extra computer since DataSocket Servers are not supported in FieldPoint RT targets. However, you do not need to use a DataSocket server. Each FieldPoint RT module can create software channels through the use of the Publish Data.vi. Using the Publish Data.vi allows you to create named channels of different datatypes that can be read by computers using NI-FieldPoint, or the NI Logos ethernet protocol. Using the DataSocket VIs, you can communicate using the Logos protocol rather than DSTP. Thus, you can use the Publish Data on either of the cFP-2020's, and use a DataSocket Read or Write on the other cFP-2020 to share data.
Here are some relevant KnowledgeBase articles on using DataSocket and the Logos protocol:
http://digital.ni.com/public.nsf/allkb/B0C5F514A850BF8F86256DAB0047BB98
http://digital.ni.com/public.nsf/websearch/91fa9c0981dae60586256e8e0025c819
http://digital.ni.com/public.nsf/websearch/af975400600eb11686256c700062da5d
http://digital.ni.com/public.nsf/websearch/48D244EC86971D3986256BD4005CCC28?OpenDocument
Regards,
Aaron
LabVIEW Champion, CLA, CPI