Baud rate of NI-cDAQ 9174

[mcduff]

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@NomisG wrote:

I have set in DAQ assistant :

Samples to read: 1

Rate (Hz) : 1kHz

I just checked switching time from electronics from low to high is like 700ns.

Best regards 

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Not sure what is going on in your program without seeing any code, but trying to read 1 point at a time at 1kHz rate is not going to happen, especially if you are using DAQ Assistant. Typically you use DAQmx functions and stream multiple points to your system as there is overhead with each fetch call; typically about 100 ms data is a good start. Look in the example finder for code.

[NomisG]

Hi mcduff

What is the difference between DAQ Assistant and DAQmx functions. Ususaly it worked fine for applications that I used, just normal reading data. I just set 1 kHz, maybe I don't need that fast. 

Best regards

[mcduff]

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@NomisG wrote:

Hi mcduff

What is the difference between DAQ Assistant and DAQmx functions. Ususaly it worked fine for applications that I used, just normal reading data. I just set 1 kHz, maybe I don't need that fast. 

Best regards

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About the same difference as "Riding a bike with training wheels" compared to "Riding a bike." Lots more options, more efficient, more control, and more fun.

Look at this, ignore the first one since you know that already.

https://www.ni.com/en/support/documentation/supplemental/06/learn-10-functions-in-ni-daqmx-and-handl...

[NomisG]

Hello all!

Since I configured CompactRIO now it works great it dosent overshoot that much, maybe 0.1 mm also on higher frequency. Maybe it was just the computer. 

Best regards 

[NomisG]

Hello,

What is the difference between RT.vi and PC.vi in project arhicteture when and using CompactRIO in FPGA programing state. Maybe for bigger projects ?

Best regards

[santo_13]

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@NomisG wrote:

Hello,

What is the difference between RT.vi and PC.vi in project arhicteture when and using CompactRIO in FPGA programing state. Maybe for bigger projects ?

Best regards

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These links will help you understand cRIO architecture and how it is different from cDAQ

https://forums.ni.com/t5/Multifunction-DAQ/cDAQ-vs-cRIO/td-p/3003565

https://www.ni.com/en/support/documentation/supplemental/17/specifications-explained--cdaq-and-crio-...