Mike,
At the present time, the only way to communicate from an HP-UX machine directly to a FieldPoint Ethernet module would be to use a FP-20XX series module and use either the TCP VI's or the UDP VI's. For the FieldPoint Serial Network modules you may communicate using the Optomux command set as documented in the FP-1000/1001 Programmers Reference Manual. If you are using LabVIEW on HP-UX, you should be able to use the LabVIEW FieldPoint Optomux VI's downloadable from:
ftp://ftp.ni.com/support/fieldpoint/LVFPOpto/
Regards,
Aaron
LabVIEW Champion, CLA, CPI