Sampling rate of NI 9225

[昭]

Hello:

i have a NI 9225 in CompactRIO 9022. the input signal is real three phase voltage.

my question is how to find out the sampling rate of NI9225. 

just find a fomular Fs=(Fm/256)/n, but can not find out how to set the value of n.

im a beginner,  5555555

could anyone help me

55555

[Pete.Dunc]

Hi 昭,

The NI-9225 can sample at upto 50 kHz/chan simultaneously.  You will define the actual rate of sampling in your code, how have you set up your acquisition?

Please let me know if I have misunderstood the question.

[昭]

hello

i know the sampling range of NI-9225, but did not define the sampling rate.

[Pete.Dunc]

- Could you attach your code so we can see what you have done so far?

[lis@jiang]

Hello 昭,

Since your 9225 module is used with a cRIO, your coding is going to be different from the DAQmx code you may have previously seen.  Setting sampling rate is done by a property node "AI Sampling Rate," not by setting the value of n in that formula.  Please take a look at the shipping example found in Help >> Find Examples.  Then navigate to Hardware Input and Output, CompactRIO, Basic IO, and Analog Input - cRIO.lvproj.

Thanks,

Lisa

[sdualienware]

hi Zhao,

Did you get that NI 9225 work properly? If you did, how do you achieve it? Right now I am using both NI 9215 and NI 9225 in my FPGA vi and trying to coordinate these two.

Hao

[TheGeeze]

Hi Hao,

Have you been able to aquire data from each of the modules alone? 

Have you looked at the examples provided when we ship the code?

When you say coordinate, what are your requirements?

Regards,

Ryan

Applications Engineer

[sdualienware]

Hi Ryan,

I have already figure it out. What I was trying to do is logging the data both from NI 9215 and NI 9225. I just build two loops. One for NI 9215, the other for NI 9225. And it did work.

Thanks for asking.

Hao