Updating an indicator on the main VI whilst executing a sub VI

[mattb-5906]

Hello,

I was wondering if you could help me with the following.

I have a sub VI that basically reads a text file and sends it out on the serial port. What I would like to do is update a progress bar (indicating how much of the file has been read/sent) on the main VI whilst this sub VI is running. I would also like to update a text box on the main VI to display the data read from the text file.

I am intending to use the sub VI on other LabVIEW projects so I need to keep it modular.

Which is the most logical way to go about doing this? Passing each control I want to update by reference? Or is there a better way?

Any help would be appreciated.

Regards,

Matt

[jon_mcbee]

Are you using an architecture that allows your top level front panel to update while the subVI is executing?  Do you think you could post an example of your code?

[Spectre_Dave · Accepted solution]

Matt

You need to create a Reference to your Main.vi Progrss bar  then use a propertn node in your subvi to update the parent control.

Message Edited by VADave on 03-05-2009 02:11 PM

[mattb-5906]

jmcbee,

Here are some screen prints of my LabVIEW diagram. Note: these were done for testing hence the the reason for no error checking and the like

See attached files

Thanks

Matt

[mattb-5906]

Thanks VADave,

I will give it a go. Are references and property nodes still the best way of doing this for the way I've set out my LabVIEW program.

Matt