isihra

Hi all

Im just beginning programming the USB 6009 with DAQmx and I am new to both.Could someone please clarify if its possible to program the device for simultaneous (analog)input and (analog)output with one VI and display both(input AND output) waveforms on two separate graphs of the same VI?

Iam generating a sine wave and outputting it on say,AO 0.AO 0 is connected to say AI 0.Can we design a VI which will simultaneously generate(on AO 0) and acquire continuously on AI 0?

Any help would be appreciated

thanx 

Pushkar

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Hi PushD,

Try looking at the examples which were loaded with the driver installation. I am doing a small project using the same DAQmx and found it to be very nice device :thumbup: with LabVIEW drivers and examples. If you send me your sample code I can fix it up for you or at least try to make is better.

Iqbal

If my memory is correct, this was a relatively common problem in LV v6.0 which was fixed ... to a large degree ... in v6.0.1 or 6.0.2.  The patch for v6.0.2 was/is free and is available here.  There were glitches in LV6.02 as well, but they were definitely fewer.

5075[/snapback]

Well, have done similar stuff I did see that problem with LV6. After upgrading to LV7+ I have not see that again. However, there are bugs in the 3D graph. As far as I remember I made the default tab of the 3D graph and you initialize the program then switch to other tab programmatically. The idea is to load the FP with 3D on top of everything else. That way you can get away with that bug in LV6. Try it.

Iqbal

Is it possible to get rid of the 'save VI' dialog that pops up when you close a VI that has been changed.

Let me explain. I have created a multi page application using templates but when you try to close a page the 'Save VI' dialog pops up because the instance of the template hasn't been saved yet.

I could programmatically save the VI in a temp directory but I was wondering if there is a better way of doing it.

5034[/snapback]

Hi Simon,

Well, as far as I know, there are two way you can use template(s) to create an instance. First is you double click on the template and second is to use the VI-Server to programmatically create an instance. In your case, looks like you are using the first method you would have to deal with the popups. If you were to use the VI-Server you would want the template VI to be able to break the loop before when your top level handler execution is stopped (or exits). This way you would never see an popup to save the vi's. This is just my experience. Hope this help.

Best Regards,

Iqbal

Hello people, i have a critical problem.

I'm new working with Lab View 7 and i have two problems.

I need to know how can i save my data into a file where my data is recorded for future use.

Other question is how can i make a graph of, for example temperature Vs time. The real problem is that i dont know how to put the time running and make a graph with it.

This is fundamental to my work and i really need your help.

Thanks!

5036[/snapback]

Hi Carlos,

Lets say you are using Waveform Graph to display your data, you would need to change the X-Scale Formatting by right clicking on the waveform graph and select X-Scale-> Formatting->Select Tab "Format and Precision" -> Select "Absolute Time". Now, you would see system time each time on X-Scale when you send a temperature data to this waveform graph. To store this data use the "Write Waveform to File.vi" under Waveform File I/O palette. Hope this helps.

Best Regards,

Iqbal

I have installed LabVIEW 7.1 and I have a couple of questions:

1) I never saw the execution target each time I  start up LabVIEW (wonder: if I didn't do a proper installation)

2) Do I need to install other required software such as NI-VISA, VISA full, VISA run-time in order to use instrument drivers

3) As I was trying to use Instrument I/O Assistant I could be able to talk to the scope, however the box named "code generation type" is grayed (disabled). And each time I run another command I got the same error "Timeout expired before execution completed, VISA status code bfff0015", the status code is the same but it's different on other computers

4212[/snapback]

Hi Leviephong,

Try this tutorial from http://www.ni.com/swf/presentation/us/signalexpress hope this helps.

:thumbup: :beer:

Iqbal