cRIO 9022 maximum speed

[homer210788]

Hello,

I am using a cRIO 9022 to acquire signals from 3 NI 9144. Each NI 9144 has a NI 9215. Now I want to acquire the signals as fast as possible. Currently I am using 1KHz clock on the timed loop, but it does not give desired results. When I try to use 1MHz clock, the cRIO does not respond and gives an error. Please suggest a way to speed up my acquisition process. 

Thanks

[_Bryan]

You need to give more specific information.  It is not fast enough, how do I make faster does not help anyone.

What sample rate are you currently getting?  What sample rate are you trying to get?

Are you trying to sample faster than the 9215 is capable of sampling?

[homer210788]

Hi,

I apologise for my late reply.

Well I am using NI 9215 which can sample at 100 Ks/s/ch. I am using only one channel. I have set the clock frequency on my timed loop to 1KHz. I want to make it around 6KHz. Is it possible? If it is, then too how do I confirm the results since the least time interval that my Windows OS can show is 1ms.

Thanks

[_Bryan]

Have you tried looking at the examples that ship with LabVIEW?  (Help>>Find Examples)

It will be possible to sample at that rate.  But you do not have to set your timed loop at the rate you want to sample your channel at.  If you post your code I am sure someone can point you in the correct direction.  I believe you should be setting up your sample rate in the scan engine if you are not programming the FPGA.

[homer210788]

Yes, I did have a look at the examples.

It would be really helpful for me if you can tell me how to change the speed at which the NI 9215 samples.

[homer210788]

I forgot yo mention that I am using Scan Mode and not FPGA.

[_Bryan]

Did any of the examples work?  If one worked you can look at the code and figure out how they set the sample rate.  Then do the same with your code.

[quarterlbr]

Don't know if this has been resolved, but I don't believe Scan Mode will support anything over 1kS/s speeds. To get higher rates, you must use FPGA mode. You might want to double check, as I'm not as familiar with FPGA mode.

[homer210788]

Yes, the maximum speed that the scan mode supports is 1KS/s. To achieve higher sampling frequencies, FPGA mode is the solution.