Viewing and Managing Tag History

If you have configured a tag to store historical dataConfiguring Tag History Settings, you can view and modify tag history data from the Tag Details screen.

View history statistics

View statistical information about tag history data on the tag's Event tab. The Statistics section shows the most recently logged value and the number of events stored.

View and modify historical values

View and modify a list of historical values, view a summary of historical data and a plotted trend line for the tag history.

To view historical values for a tag in the Site Tags module:

1. Select the tag whose history you want to view.
2. Click Event History.
3. Enter a time range, or accept the default range, and click Find to open the Event History form for the tag. From here, you can:
   • Insert a new event and value.
   • Delete an event.
   • Modify an existing event.
   • Use the Summary tab to view summary data and a graphed trend line for the tag values.

   Note

   If the buttons on the Event Summary form are disabled, try switching to the Summary tag and back to the Events tag.