Curve Tracer Program

[Dennis_Knutson]

Now I understand - this is a class assignment. The two express VIs in the document must have been created by someone using the Express VI toolkit. They are not part of LabVIEW 7. I don't know if your assignment is to create the Express VIs yourself or to use what someone else has created and test a ciruit you design. In either case, I can't help you.

[shangu]

This is not a class assignment. I had just found the information from a website. I am working on a project and just wanted to know how I can create a Express VI like the one in the block diagram. Thank you for the help.

[Dennis_Knutson]

Excuse the misunderstanding. The Express VI is named EE438 which obviously refers to an EE class. Express VIs can only be created by purchasing the Express VI Toolkit. The original VI that you posted does not make use of Express VIs so you should be able to use it as is or stick the DAQ functions into subVIs to give you much of the same functionality.

[shangu]

Thanks Dennis for the information. I will try in that direction.

[shangu]

Hi Dennis

This is how I am trying to generate a sweep voltage (Simulate signal) and to generate voltage (1, 2,3,4,5) in series , I am using simulate arbitary signal. Could you please tell me if this is the right method of generating voltage and also when I am trying to run the program I am getting errors in my DAQ assist ( input and output).I am using version 7.0. Could you please correct my circuit or tell me what I am doing wrong. I am sorry for troubling you.

Thanks

[shangu]

Hi Dennis

This is how I am trying to generate a sweep voltage (Simulate signal) and to generate voltage (1, 2,3,4,5) in series , I am using simulate arbitary signal. Could you please tell me if this is the right method of generating voltage and also when I am trying to run the program I am getting errors in my DAQ assist ( input and output).I am using version 7.0. tell me what I am doing wrong. I am sorry for troubling you.


Thanks

[Dennis_Knutson]

I'm afraid that you're not even close. You've got all these things going on simultaneously and none of them are quite correct. Even if you're successful in generating a sweeep voltage, you're not doing any measurments at the same time. The DAQ reads might happen before or after you've done the sweep. You need to generate a single voltage (i.e. DAQmx Write), do a read (i.e DAQmx Read), increment the voltage and repeat until done. Look at some of the basic examples that ship with LabVIEW for generating a single output and single point measurement. Use error in/error out connections to enforce data flow.