Martin,
I performed experiments several years ago in which I compared the timestamps from multiple digital channels across the same FieldPoint bank and across different FieldPoint banks. These experiments were made with FP-1600 modules running firmware versions 0100 and 0200 with the ethernet modules set to use the same computer as the time server. At that time, the mean accuracy of the timestamp between the channels was about 17 ms or so. This was solely for reading input channels and was performed with a smaller amount of channels. I would suspect that the [c]FP-20XX and FP-1601 modules would perform better on the same test.
FieldPoint ethernet communications are asynchronous, using a server-client on-change model. Thus it is harder to benchmark output speed and accuracy and I (personally) am unaware of any relevant benchmarks.
A similiar benchmark that NI made with an older version of embedded LabVIEW code (RT) with a FP-20XX unit was that a FieldPoint Read.vi (running inside an RT controller) would take about 350 us. This would allow you to read 9 FP-DI-301 modules (144 channels) in approximately 3.5 ms. You would need a mininum of two banks, so the driving factor would be you interbank communication at that point.
Regards,
Aaron
LabVIEW Champion, CLA, CPI
