GammageATX

I just tried what you suggested, I installed the legacy NI-DAQ for 6.9 and 7.4, which if I read correctly had the files from 5-7.4 and the files I installed with 8.5 should cover me from 5-8.5. It is still not finding the files that I need. It is looking for a directory called 1easyio.llb and the first file it ask for is AI Acquire Waveform (scaled array).vi. Does any have any insight into what is going on?

Looks like it is complaining on the absence of traditional NI-DAQ. Figure out the proper version of traditional NIDAQ from here: http://digital.ni.com/public.nsf/allkb/97D574BB1D1EEC918625708100596848,

download and install what you need

I am relatively new to LV and I am currently working on a project in my University Physics lab that hasn't been done in several years. As I was trying to get everything working again I came across the Vi to control a stepper motor and take some data. The computers have been upgraded and LV 8.5 has been installed to work with the new DAQ's. When I try to open the Vi it is not finding the old template vi's that were called in the code. I thought I had found a way around this by installing the legacy templates from NI's site but these were already installed. If someone could take a look I would be very grateful.

Thanks,

Michael

raman.vi

Ok, I see what your saying now. I've made changes and if you wouldn't mind looking at them again, it would help me out a lot. Thanks again.

QUOTE (Neville D @ Mar 30 2009, 12:51 PM)

Yes, quite a lot..! The stop case doesn't seem to actually stop the tasks, just the loop. The DutyCycle2 etc.. stuff doesn't seem to be going anywhere after the initial setup and run.

Why don't you just simplify and try with a single counter and then add the next one later.

Add changing freq+Duty cycle as another has posted.

Put the Stop button INSIDE the event structure and feed the result out to the loop stop icon.

Add a timeout event to stop the loop (instead of freezing it) in case there is a DAQ error.

Look at my screen shots posted earlier about how to stop the code gracefully.

N.

I am trying to understand the simplest case first and I haven't been able to get it going. This is what I have so far for running two signals and having one that allows for a change of the duty cycle. I can't seem to get the duty cycle to change though. Am I missing something?

Thanks, I'll try this.

I am trying to generate two square waves continuously. This in itself has cause me problems. But I also need to vary the duty cycle of one of the pulses during run time, varying the frequency on the other would be nice but isn't necessary. One way I have found to do this causes a lot of software jitter in the signal. I have found two examples; one for each of the things I want to do and have tried to merge the logic. The result is included. This hasn't proved successful. Any help would be appreciated.

THanks

Using Labview 8.5