Data Logging Issue

[smercurio_fc]

It's too hard to tell what's going on from the screenshot since it's not showing all the code. Can you upload the VI? How is your DAQ Assistant configured?

[Hydrates]

I will upload the vi tomorrow late morning when I make it in. That should have the assistant settings. Thanks

[Hueter]

Yes, you can place the wait anywhere in the loop and it does not have to be wiered to anything else. Use the "Wait Untill Next ms Multiple" with a constant (or control) wired to it so you loop does not go as fast as possible and cosume all of your system resources. If you create a timing control you can adjust the timeing so you can find what is too fast or slow.

Hunter

[Hydrate]

Here is the vi file that I am using.

[smercurio_fc]

I can't run the VI since I don't have the hardware, but I don't really need to do that. As it is, it appears that you want to be reading data at a certain rate, controlled by "Data Logger Freq", and if the user elected to save to file while it's reading then it does so. Personally, I wouldn't use the DAQ Assistant since I abhor Express VIs. Still, you can use them if you wish. I don't understand why you say that you can't set up the DAQ Assistant to "on demand". That is one of the available options. Are you saying it's grayed out for you?

[Hydrate]

It can be set to on demand when I'm reading the thermocouple module only, but the NI-9237 which reads the pressure transducers will not support the 'on demand' feature, so it cannot be used.

[smercurio_fc]

Sorry for the delayed response. Past couple of days have been a bit busy at work, thankfully. In any event, I don't really understand why you can't select N samples. I don't have your hardware, but I created simulated devices in MAX and I was able to select N samples for your task, and the code ran with no errors. I don't know if it's because I'm using simulated devices. If you still can't get it to work you may want to give NI tech support a direct call.

[Hydrate]

We don't know how many samples we will collect so N samples is not an option.  Also the time the code loops seems to be always 3 no matter what value is selected.  Thanks again.

-John