Short Name: DataLogging.Lifespan
Requires: Base Development System
Class: Library Properties
To Use: Create a property.
Sets the lifespan (in days) of the logged data in the database. If value is 0, then data is always available, otherwise the database can destroy data after the number of specified days.
The database only discards data if new data is logged. This property affects all data from the library stored in the database, not just the most recent data. For example, if you set this property to four days and you have three days of data, the database does not destroy any data. However, if you set this same property to two days from four days and you have three days of data, the database can destroy any data collected more than two days ago.
|Note The LabVIEW Datalogging and Supervisory Control Module supports this property in the Run-Time Engine.|
The following table lists the characteristics of this property.
|Available in Run-Time Engine||No|
|Available in Real-Time Operating System||No|
|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||No|
|Available with polymorphic VIs||No|