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PCI 6221: Error -200019 occurred at DAQmx Read (Analog 1D Wfm NChan NSamp).vi:2

Hi,

I encountered the error below when I tried to run the Labview vi for torque and rpm measurements. I have a torque sensor connected to a impeller blades. I am unable to get any readings for the rpm and torque because of the error.

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Error -200019 occurred at DAQmx Read (Analog 1D Wfm NChan NSamp).vi:2

 

Possible reason(s):

Measurements: ADC conversion attempted before the prior conversion was complete.

Increase the period between ADC conversions. If you are using an external clock,
check your signal for the presence of noise or glitches.

Task Name: _unnamedTask<1>

--

Error -20308 occurred at an unidentified location

 

Possible reason(s):

Analysis:  The waveform did not cross the mid reference level enough times to
perform this measurement. Check the signal length, reference levels, and ref level units.

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I get the second error when I press continue.

 

I appreciate any input.

 

Thanks,

Sumit.

 

PS: Please find the vi attached.

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When your data comes out of the DAQ Assistant, you are sending both channels to each of the calculations.  Try using the Split Signals VI located on the Express section of your Functions Palette under Signal Manipulation.

 

 

 

Regards,


h_baker
National Instruments
Applications Engineer
Digital Multimeter Resources
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Thanks, I will give it a try.

 

Sumit

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Hi,

 

Thanks it is working now.

 

Sumit

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