Continually update input value

[r.youden]

I have, in conjunction with a LabView support engineer, developed a VI which records a frequency input, converts the signal into rpm and scales the output as a 0-5V signals (0-3000 rpm range).

The VI works perfectly except it does not constantly update, i.e. the voltage output is constant at the first frequency it records, how can I modify the VI so it constantly updates the output as the input varies?

I have attached the VIs I've been using.

Thanks,

Richard

[crossrulz]

I'm not seeing anything immediately wrong, DAQmx wise.  Are you getting any errors?  Try removing the Run Task for the Analog Output.  Since it should just be an on-demand task, you shouldn't have to tell it to run.  Just write to the task inside of the loop.

I felt the need to clean up your VI.  There is no need to have 2 stop buttons.  And then all of the ORs can be combined with a Compound Arithmetic Function.

[r.youden]

Hi.

Thanks for the reply. I have run your version of the vi this morning and I'm still getting the same result. The output is correct when I first run the VI but it never updates. I left it running for a bit longer this time and I eventually get the attached error.

I appreciate your help.

Many thanks.

Richard