compactRIO 9025 voltage acquisition

[Infodeck1]

Hi Everyone,

I just got a new compactRIO 9014, I wired a voltage to channel 0  of  9205 C series input card using differential (pin 1 + and pin 20 -). I am getting the voltage ok on the front panel but if I drag the other channels on the same module across to the block diagram, I am reading the same voltage value on these channels which I have no voltage input connected. I wonder whats causing this

I am also having problem integrating acceleration which I obtain ok from a c series 9234 card on the compactRIO. I have tried to use integral.vi and point to point integral x(t). I dont seem to get the right results for velocity. Using the same 9234 card through my USB connection with the traditional DAQ assistant, I get the velocity through integration ok.

I am only using real time module 3.5.1 for my application. I don't intend to use FPGA.

I would be glad to get help with this

Jide

[preston_johnson · Accepted solution]

First - you should consider using the cRIO Waveform Reference Librarry for your FPGA, this will free up most of the 9014 for Analysis:

https://forums.ni.com/t5/Example-Code/Reference-Application-for-NI-CompactRIO-Waveform-Acquisition/t...

Second, you should consider the Sound and Vibration Measurement Suite for your vibration analysis routines.  We have optimized the measurements to work embedded in CompactRIO

here is an overview of the sound and vibration measurement tools

https://www.ni.com/en/support/documentation/supplemental/08/sound-and-vibration-software-overview-an...

[Infodeck1]

Thanks for response. Very helpful