Data Change Event
Installed With: Full Development System
Class: FacadeVI Events
Type: Notify
Generated on the Facade VI when the value of the XControl changes as a result of writing to its terminal, local variable, or Value property. LabVIEW calls the Facade VI with the new value.
The Data Change event is not generated when the values of controls on the Facade VI change. Add a Value Change event to the Facade VI for these controls.
 | Note LabVIEW does not call the Facade VI on every write to the terminal or local variable. LabVIEW calls the Facade VI when the XControl requires an update. You cannot build an XControl that logs data written to its terminal because not every value is reported to the Facade VI. Use the Value (Signaling) property to write values if you want the Facade VI to update on every value written to the XControl. |
Event Data Fields
| Name | Description | ||
|---|---|---|---|
| Source | Source of the event. LabVIEW UI refers to any built-in user interface event.
| ||
| Type | Type of event that occurred, such as Mouse Down, Value Change, Timeout, and so on. | ||
| Time | Value of the millisecond timer when the event occurred. | ||
| VIRef | Reference to the VI on which this event occurred. |