Solution
Value (Signaling) Property Node sets the value of the control and in addition generates a Value Change event.
This property updates the value of an object similar to the Value property. However, Value (Signaling) also causes LabVIEW to generate an event as if the user had interactively changed the value of the object.
To illustrate this, create a value change event for OK Button boolean control set as switch mechanical action as shown in the below diagram. In this example when you press OK Button a dialog will popup. The OK Button will return to False state once you close the popup dialog box.
To compare the behavior of the Value property and the Value (Signaling) property, create two event cases triggered by two different Boolean controls, as shown in the diagram below. The event on the left writes a value to the OK Button’s Value property, while the event on the right writes a value to the OK Button’s Value (Signaling) property.
You can see the difference in behavior in the GIF image below. When the Case 1 button is pressed, it generates a Value Change event as if you pressed the OK Button itself. When the Case 2 button is pressed, the OK Button’s value changes, but its Value Change event is not triggered, so no dialog box appears.
