running a vi at a set volt...then looping but set a 0 volts.

[iconpro]

i have the Keithley 2400 and i want to use the it a a define volt then i would like to run it again at a 0 volts...is there a way to set it up so that the Keithley VI to do that?

[DiegoF]

Hi,

I couldn't find an instrument driver for the Keithley 2400 at ww.ni.com/idnet. You mention the Keithley VI, Which VI is that?.

The best source of documentation is the instrument's user manual. If you have an instrument driver, you can compare the commands sent by the VI with the commands listed on the manual. If you don't have an instrument driver, the user manual has all the commands needed to control the device.

DiegoF.
National Instruments

[iconpro]

Here is the Vi i was talking about...

[Dennis_Knutson]

You didn't include any of the subVIs. One of those subVIs will set the source voltage all by itself. You do not have to use the whole top level VI that you attached. If you got this VI from Keithley, then it should be similar (if not the same) as one I used several years ago. Look for something similar to DCV source Config. You could also open all of the subVIs and see what kind of description is provided.

[iconpro]

i want to use the top level VI to allow the engineer to configure what volt he/she wants to use...then have the other program that is used along with this VI to do a loop but changing the Voltage to 0 on the second loop.

[ian_fung]

Please save your vis as .llb so that one of us can help you by looking into your program.

Cheers!

[Dennis_Knutson]

So do you need help in how to do a loop, how to modify the VI for user input, or what? To modify for user input, you're going to have to put some kind of while loop in the VI so that it waits for user input before setting the instrument. To programatically set the values in you main program, you'll also have to add the VI's inputs to the connector pane. Provide a few more details on where you're stuck and we can help more.

[iconpro]

I'm using the 8563E VIs in conjunction with the Keithley 2400 VI....what i'm trying to do is test the noise frequencey. On the first Run i want the user to be able to input the Volts that he/she wants to use, then on the second loop...i want the Keithley to run at 0 volts. Attached are 2 of the VIs that i'm using.

[Dennis_Knutson]

If you want help in modifying the Keithley VI, then you need to include all of the subVIs. Do a Save With Options and create an application distribution and create an llb.

[iconpro]

I dont know if i saved it correctly because i dont know much about this...I was just given the project to complete. Thanks for all your help.