Clear digital channels after loop

[kjschmidt]

I'm pulsing 6 LEDs with Labview and the DAQ USB-6351, but I have an issue when the program stops.

I've attached the VI. 

The problem appears depending on when the user stops the VI, the LED remains turned on.

I tried to solving this problem by writing false to all the channels, but this gives me a warning every time, and it doesn't solve the problem.

Any solutions? 

[crossrulz]

What warning/error are you getting?  Why are you trying to read from digital outputs?

[kjschmidt]

The readings from the digital channels are just to know which state the LEDs are in. 

The warning im getting is: 

[crossrulz]

Stop the task before writing your all FALSE.

[kjschmidt]

You mean like this? I still get the same warning. 

[crossrulz]

Almost.  Why would you restart your outputs right after stopping it?  That's just silly.  All you need is to remove that DAQmx Start that is done right after the DAQmx Stop Task.

[kjschmidt]

Thanks for bearing with me..

When i remove the Start DAQmx, I just get another error:

[Bob_Schor]

Do the final Write (of all False) before you stop the Task (but after you exit the While loop).  The Task needs to be running fin order for I/O to take place.

Bob Schor

[kjschmidt]

Bob, if I remove the stop DAQmx I'm back to where I started. 🙂

[kjschmidt]

Any hints?