Right-click on the LED on the Front Panel, and Create -> Local Variable.
On the Diagram, the variable should have a white border by default, if not,
right click on it and "Change to Write Local" (you can either only write or
only read from each LV)
Now, when the tank is almost full, just wire a constant T or F into the
variable.
Note: The LED in LabVIEW isn't that good. I might be fun to learn how to edit
this and create your own LED button. I have one I just made if you want it
Rick
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rick@csciences.com
Chesapeake Sciences Corp.
1127B Benfield Blvd Millersville, MD 21108
Tel: (410) 923-1300 x3430 Fax: (410) 923-2669