Short Name: Val(Sgnl)
Requires: Base Development System
Class: Control Properties
To Use: Create a property.
Sets the value of the control (LV variant) and 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. National Instruments recommends you use this property only when you rely on LabVIEW generating an event in response to the programmatic value change.
If this is a Boolean value configured with a latching mechanical action, this property always returns an error. Due to race conditions that can occur when you have a Boolean value with latching mechanical action, you cannot programmatically read Boolean values that are set with a latching mechanical action.
The following table lists the characteristics of this property.
|Available in Run-Time Engine||Yes|
|Available in Real-Time Operating System||Yes|
|Settable when the VI is running||Yes|
|Loads the front panel into memory||No|
|Need to authenticate before use||No|
|Loads the block diagram into memory||No|
|Remote access allowed||Yes|
|Must wait until user interface is idle||No|
|Available with control VIs||No|
|Available with global VIs||No|
|Available with strict type definitions||Yes|
|Available with polymorphic VIs||No|