Way to acquire more than one sample at a time into Labview from cFP?

Question

In reading data from my cFP into Labview I see that I can use the FP Read.vi but it only grabs one sample per call (loop iteration).  In other devices, I could just use the AI Acquire Waveform.vi to grab multiple samples per call.  Can I use this for cFP?  Is there another way to grab more than one sample per call from my cFP?  I'm just running it from a host computer, not using RT.
My specific problem is that I have two things I want to do with the same signal, one slow (PID control loop) and one fast (data logging).  If I put the FP Read.vi in the same loop as the PID control, I can only get one sample in the time it takes the PID loop to run which is too slow.  I'm trying to think of ways around this problem.
Thanks,
Hosehead

Answer 1

Hello Hosehead,
With FieldPoint there is no way to acquire more than one same at a time like
you can with NI-DAQ.  With the FieldPoint read and write VIs
you can only read or write a single point at a time.
Please see the Sampling
Speed of FieldPoint Modules document for more information on cFP
acquisition rates.  This document explains how channels are updated, how
often the data is updated, and what happens if you miss samples.  Please
note that you will be able to acquire more samples if you are running your
application on the RT controller and not on your host computer.
If this does not answer your question, can you please post more data about the rate
you want your PID loop and your data logging loop to run at.
Regards,
Jesse O.
Applications Engineering
National Instruments
Jesse O. | National Instruments R&D