If I replace the control with another why DAQmx create channel once complain a false claim?

I tried to replace the frequency by another control in the example found here complete PWM:

http://www.NI.com/white-paper/2991/en

However, I get the following error message:

Possible reasons:

Requested value is not supported for this property value. The value of the property may be invalid because it is in conflict with another property.

Property: CO. Pulse.Freq
Required value: 0.000000
Valid values begin with: 22.300000e - 309
Valid values ending with: 20.0e6

Channel name: Dev1/ctr0

Task name: _unnamedTask<10>

My wiring diagram looks like this:

If I cancel my change (i.e. I have remove the frequency control knob and turn it over to the control of the example, it works perfectly.)  I get the waveform is displayed in the oscilloscope.

My goal is to simply use a frequency and duty cycle control knob.  How can I achieve this?

There are two things to do.

What I think you did now changes the scale of the handle.

You will also need to change the values that are allowed to enter. You will do on the data entry tab in the dialog button properti.

Uncheck the 'use default', the Minimum value limits and Maximum identical to your balance.

Value "Response to value out of range" Coerce to both Minimum and Maximum.

I hope this helps.
Let me know if you have more problems.

Tags: NI Software

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