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Re: Generate a PWM signal from labview to control a valve

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Hi Doug,

 

Thank you for your valuable advice. I'm not sure what an Action Engine is, I tried using the labview search button to find it but unfortunately no results. Can you please tell me where exactly would the AE be placed in the block diagram, I don't really get why would I need a case structure or an AE. When I start this program the DAQ will continuously be generating a PWM signal right until I halt right?

About the duty cycle, I really need a 50% duty cycle, but when I set it to 50, I get this error:

 

Error -200077 occurred at Property Node DAQmx Channel (arg 3) in DAQmx Create Channel (CO-Pulse Generation-Frequency).vi:1->Daqmx.vi,

It says that:

Requested Value:  50.0
Valid Values Begin with:  119.209297e-9
Valid Values End with:  999.999881e-3

 

That's why the d/c was set to a strange value of -5. If you can please edit the VI into what you see is best and send it back to me that would be terrific. Thank you very much!!

 


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