Nathaniel,
The FP-1600's use a National Instruments proprietary communications protocol. At this point in time, there are no plans to release the protocol. On the other hand, the protocol for the FP-1000/1001 serial network modules is published in the FP-1000/1001 Programmers Reference Manual and can be implemented on any platform.
If you are using LabVIEW, I have recently created a driver for the serial modules, that is multi-platform, that will be included in the next version of FieldPoint Explorer, but I will also be making it available for download independantly of FieldPoint Explorer.
Regards,
Aaron
LabVIEW Champion, CLA, CPI