multiple timestamps Waveform chart

[Matt Kniller]

How do I get more that two or three timestamps along the X-axis of a wavefrom chart?  Idealy I would like to have 5 scale markers on my chart that update with the timestamp that comes in with the data being plotted?

Currenly I see a timestamp at the extreme left and right of my chart and every so often I will see a third timestamp move along the x-axis from right to left...

Any suggestions?

Matt

[Ben]

[Matt Kniller]

What are the two VI's that you are using inside the while loop?

[Ben]

I beleive those are sub-VI that let you use a WF graph as if it was a chart (they hold the history).

The import thing you are looking for is the property node to set the markers.

Ben

[Matt Kniller]

So I have tried building the the diagram you mentioned above but I continue to get Error 1055 LabVIEW: Object reference is invalid at the first property node.  Any ideas?

[Ben · Accepted solution]

Sorry Matt!

Between the difference of a XY graph vs a Waveform Chart and throw in a bug with the VI Snippet not handling property nodes correctly, you were bound to have trouble.

This code is attached below as LV 2009.

Ben

[Matt Kniller]

Thank you.  That did exactly what I was looking for.  I also like that I am able to control how often I am able to put a new hash mark at the bottom with this method.