Waveform Output Using USB 6009 to control Solenoid Valves

[Danwhc]

I'm trying to write a vi that would use USB 6009 that is connected a solenoid valve. I tried to use analog output that outputs as a voltage.

I'm trying to get a 33% duty cycle with a frequency of 1Hz and with an amplitude of 5V (sq wave).

It keeps telling me Error -200077 occurred at DAQ Assistant.

I'm really very new at this and I'm not sure what to do next. Is there a way to detect a waveform when its high and low? Or can I simulate that a different way without using a waveform generator?

Thanks

[Katerina]

Hi,

I have faced the same issue. The error code means 'Requested value is not a supported value for this property.'

Following update of range it started working. The "range" stands for one of the following: min/max values and value itself  you try to write. The range defined  at "DAQmxcreateAOVolatageCHAN" step.

Goodluck. 

[Dennis_Knutson]

Since the 6009 analog output is software timed, you certainly cannot specify a waveform as an output. You can only write a single point at a time.

[contraone]

Hello I have the same problem however with my NI USB 6008 however. The change of the output range didn't solve the problem. I have attached a picture of the error message. Have you solved your problem?

[Dennis_Knutson]

The error message tells you what you have done wrong and it is exactly what I have just said. The 6008 is simply not capable of outputting a waveform like you have specified.

[Danwhc]

Thanks. I thought so after reading something like that last night. 

Can you kindly recommend how would implment a PWM signal that has a variable duty cycle and at 1Hz? 

[Dennis_Knutson]

See this.