Passing VISA resource name

[jmax007]

I am using the "open VI reference" to call a vi like a pop-up window. like shown:

In the vi that I am calling, "Debug_Output_Display.vi" I am connecting to a com port. I would like to be able to specify which COM port to choose.

This is all part of a much bigger program that has one front panel where the COM port is selected.

How can I pass this information to the "Debug_Output_Display.vi"?

I am not sure how to do this?

Any help would be appreciated.

Thanks

Jamie

[Francois Normandin]

How can I pass this information to the "Debug_Output_Display.vi"?

Hi Jamie,

Among other things, I'd suggest initializing a functional global variable with the COM port value you want in your main program, and then access it from your dynamically called VI.

You could also use the "Control Value: Set" method (VI Server) but that doesn't scale well since it's a methodcalled by label text... Change the label text in a future version of "Debug_Output_Display.vi" and you break your functionality without any way to trace it with a broken arrow.

[jmax007]

Thanks. That will work perfectly.

Not sure how I missed this?

I guess I'll mark this as the new thing I learned today:)

[PaulG.]

I used to use invoke node Ctrl Val.Set but Francios' warning about it not scaling well makes a lot of sense. I would lean more towards the functional global.

Edited June 2, 2010 by PaulG.