Why no WF chart history in prop. node?

[gstanczak]

Why am I am not able to see the WFChart history property in the property node from a WFChart reference, but I can when I create a property node directly from the WFChart?

Additionally, what is the difference between the value and history of a WFChart, and which should I write to in order to clear the chart, for example, when starting a brand new acquisition?

Thanks,

Greg

[RavensFan]

I see the history property node whether the property node is inherently linked to a WF chart or it is disconnected from a chart and must be fed a reference.

What version of LV do you have?  Can you post a VI that is giving you trouble?

You need to write an empty array to the history property node to clear a chart.  Writing it to the value node just appends nothing to the existing history.

[gstanczak]

Sorry, 7.1.  I think I'm missing something fundamental.

You're right, if I make a ref to the chart and wire to property node I see the history node.  But I am trying to make a subVI to write the properties of controls and indicators on my main VI.  On my main VI there is a chart, so I created a WFChart control reference in the subVI, wired the WFChart reference to the connector pain, and then wired my actual chart ref to the subVI. I notice the property node in the subVI (where history does not show up) does not say "strict" on the property node.

Greg

Message Edited by gstanczak on 03-30-2010 09:09 PM

[RavensFan · Accepted solution]

Right click on the control on the front panel, or the terminal in the block diagram, and check Include Data Type.  It should add a little red star to the icon of the control on the front panel.  Though for the waveform, most of the star gets covered up.

Message Edited by Ravens Fan on 03-30-2010 10:18 PM

[gstanczak]

Great!  Thank you!

This forum is so amazing to me.

Message Edited by gstanczak on 03-30-2010 09:23 PM