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Value (Signaling) Property

LabVIEW 2013 Help

Edition Date: June 2013

Part Number: 371361K-01

»View Product Info

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.

Data type
PermissionsWrite Only
Available in Run-Time EngineYes
Available in Real-Time Operating SystemYes
Settable when the VI is runningYes
Loads the front panel into memoryNo
Need to authenticate before useNo
Loads the block diagram into memoryNo
Remote access allowedYes
Must wait until user interface is idleNo
Available with control VIsNo
Available with global VIsNo
Available with strict type definitionsYes
Available with polymorphic VIsNo


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