Home Community Example Programs Example Code Document

Example Code

cancel
Turn on suggestions
Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for 
Search instead for 
Did you mean: 
ASK A QUESTION

Registering Value Change Events in Event Structure.

by: Member
‎09-21-2009 11:30 AM
Last Edited by: Member Example_Scrubber_Ivan ‎02-08-2017 12:55 AM

Products and Environment

This section reflects the products and operating system used to create the example.

To download NI software, including the products shown below, visit ni.com/downloads.

    Software

  • LabVIEW

Code and Documents

Attachment

Download All

 

Overview: This example program shows the differences in how an event structure registers value changes. 

Description: A direct change to a control on the front panel will register an event.  Also, a the value(signaling) property node will register the event.  If the value property node is used, the event will not be registered.  Any programmatic value changes need to use the value(signaling) property node.

Requirements: LabVIEW 2012 (or compatible). Hardware: none.

Steps to Implement or Execute Code:

1. Run the VI.
2. Use controls to view the action.
3. Change Numeric value.
4. Change Value Control and press Value button.
5. Change Value (Signaling) Control and press Value Signaling button.

A pop-up will appear when a value changed event is handled. Note that merely setting a value property does not generate a value changed event.

Additional Information or References:

 

Registering Value Change Events in Event Structure FP.png

 

Registering Value Change Events in Event Structure BD.png

**This document has been updated to meet the current required format for the NI Code Exchange.**

 

Cheers,
Kelly R.
Applications Engineer
National Instruments

Example code from the Example Code Exchange in the NI Community is licensed with the MIT license.

0 Kudos