Ralph,
The FP Read/Write/Advise VI's will report (via Error Out)Error Code 33162 (Failed to Connect to Item on Module) or 33163 (Connection has been broken) if the computer is unable to communicate with a FieldPoint Ethernet Module. The VI's use 33162 if the program is started and is unable to connect and 33163 when the connection was live and is broken. You can have your program watch for these error codes to determine connectivity status.
Regards,
Aaron
LabVIEW Champion, CLA, CPI