Hello John. Thank you for contacting National Instruments. There is an example of how to communicate with the (c)FP-TC-120 with CVI on ni.com.
click here CVI is ANSI C with a user interface to make the program more user-friendly. You can take these programs and delete all of the callbacks to see how to communicate with your fieldpoint module. Please let me know if you have any questions. Have a great day!
Marni S.
National Instruments