continuous digital pulse train with variable duty cycle

[theresmychippy]

I have a vi that is like the one shown here (figure 3): http://zone.ni.com/devzone/cda/tut/p/id/2991

The duty cycle updates when the value is changed on the front panel as it should. However, if I have another vi send this one a duty cycle it never updates. I have tried using a global variable instead of a local variable and it did not change. Your help is greatly appreciated

[theresmychippy · Accepted solution]

never mind, I figured it out

[RavensFan]

Please post in your message what you did that answered your question.  That way if anyone searching for the same question finds yours, you'll be able to help them.  Just saying you figured it out isn't really a solution.

[theresmychippy]

Sorry, I've attached my new vi. I took out the while loop because it wasn't necessary if i run the second vi continuously. Now, every time the duty cycle changes on the second vi, it changes in the vi I attached.

[RavensFan]

You should not be using the Run continuous button.  That is only there for debugging purposes.  If you want the code you attached to run more than one time, you should have a while loop around it and a Stop button attached to the loop's stop terminal.

But you don't want to continuously create and kill the task.  You should go through the examples in the example finder for DAQmx and see the various ways the DAQmx functions can be used to continuously update your task.

Message Edited by Ravens Fan on 04-02-2010 03:39 PM