Cycling analog output on and off

[choc]

Hi Hillman,

I didn't realize that altering the current code in real time would be problematic. I like your idea about stopping the task (i.e. terminating the while loop). So do you mean that when I stop the while loop (and thus the VI) when the AO is at the HOLD value (1 V), I would then flick a switch to change the task, then run the VI again to ramp down the SO signal? Or do you mean I could setup another separate VI do ramp the signal down?

Cheers

[Hillman]

Hi Choc,

Thanks for your reply.

I meant  you would end your first task, and then start a new one to do the ramp off - in the same vi. 

But, with labview, always so many ways to do things. Im sure there is a way to alter the waveform your outputting... but Im not sure of it.

Regards,

[choc · Accepted solution]

Hi Hillman,

      OK, I think I have the VI I need. Within the same VI, I can produce the ramp-hold-ramp AO pattern I want, and if I need to stop the AO, it also ramps down the AP to zero. Also, I have a waveform graph that show the AO in real-time (through an AI channel of course). If you could let me know what you think of the VI, I would greatly appreciate it. Thanks again!

[Hillman]

Hi Choc,

Thanks for the reply, sorry about the delay.

The vi you've posted would be my solution to the problem. Looks fine to me, however I cant run it as I dont have any hardware at the moment.

Happy LabVIEW-ing!

Kind Regards,

James.