XControl with it's own dynamic VI

[Phil Duncan]

Greetings All,

I have been working on a relatively simple XControl for a project we have atm. Right now it is a simple single ended Bar graph with some alert features. The user can specify the upper and lower limits of the range, a warning threshold, an alarm threshold and a warning time. This is version 0.1 of the final XControl which will have a lot more functionality including double ended (bi-directional fill) display options.

Operation:

If the data value is in the warning range, the BG colour of the bar chart turns orange

If the data value is in the alarm range, the BG colour of the bar chart turns red along with the BG colour of the numeric indicator under the graph.

If the data value is in the warning range for more than the warning time limit (default = 2sec), the BG colour of the numeric indicator turns red.

After setting up all the panel resize and scaling issues I have finally implemented some of the operating logic. Because the XControl involves some timing functionality (essentially a stopwatch), I decided to use VI Server to call a dynamic (stopwatch) VI. I tested the XControl and it works exactly as expected, until..... I added a second bar graph XControl to my tester app "PLAYTEST Bar Chart.vi" only to find that each XControl is messing with the same stopwatch VI. I have tried all combinations of re-entrancy settings and read plenty of posts about re-entrant VI and data spaces etc, frankly I am more confused now than I was before.

What I need is to have each instance of the XControl talk to it's own stopwatch VI. Is this possible?

Cheers & Beers,

PS Attached code is in LV 2009.

Dynamic Bar Chart.zip

Edited November 9, 2009 by Phil Duncan

[Aristos Queue]

Yes, it is possible. I did something similar in this XControl. It should serve as an example for you:

http://decibel.ni.com/content/docs/DOC-1180

[jgcode]

Greetings All,

Hi Phil

I posted the same question recently.

It does work which is great news.

Cheers

JG

[Phil Duncan]

Thanks for your replies.

I have since re-structured the XControl and now it performs as I would like although there are still a few bugs. I will review your submissions in detail as I am sure they will shed some light.

Cheers & Beers (particularly cold ones given the current heatwave in Adelaide )

Edited November 10, 2009 by Phil Duncan

[jgcode]

Thanks for your replies.

I have since re-structured the XControl and now it performs as I would like although there are still a few bugs. I will review your submissions in detail as I am sure they will shed some light.

Cheers & Beers (particularly cold ones given the current heatwave in Adelaide )

A fellow Aussie!! - Howdy mate!!