cRIO real time and FPGA confusion

[gubin]

I am confusing about using real time or FPGA~

I learn from training material  ,That using cRIO with real time and FPGA, you have two

ways to timing: one is scan engine ,another is FPGA timing. However, the timing freqency 

of real time is limited to 500 Hz, see attached.

I wonder, if I want to acquire samples using 5k rate of DAQ card in real time

system,such as cRIO, and sample interval is 1Hz. That is to say , using a timed loop which is 1 Hz, and inside 

the loop, can I using DAQmx to acquire waveform using5k rate?  or I must using FPGA to acquire waveforms 

whe I want to acquire waveforms using rate above 500 Hz?

[crossrulz]

DAQmx does not work on a cRIO.  You will need to have the FPGA acquire the data and send it to the RT using a DMA FIFO.

[gubin]

Dear,  thanks a lot for your quick response!

I have further questions:

   If FPGA must be used for acquiring waveforms in cRIO, then can I use cDAQ real time controllers? for example, cDAQ-9132 real time chassis. It does not have FPGA.

   That is to say, can I use cDAQ real time controllers combine with DAQmx to acquire waveforms?  

    for example, using a timed loop with 1000ms timing, then put inside a DAQmx acquisition subVI to acquire a 100ms data using 5k sampling rate? just like in Windows LabVIEW applications.

Thanks~

[crossrulz · Accepted solution]

cDAQ does not have an FPGA, but uses DAQmx.