Search previous tag values

Change the range of historical values for the current tag in the Search Previous Values window.

1. In the Tag Info pane, click the Previous Values tab and select an entry from the list.

2. Right-click and select Search Criteria.

3. In the Search Previous Values window, the default setting of 25 previous values from PI Data Archive is displayed. To change criteria, choose from the following actions.

   To ...	Do this ...
   Modify the number of previous values	In the Number of previous values field, enter the number of values you want to view. The number of values retrieved from PI Data Archive is always equal to or less than this limit, even though there may be more values in the specified Start Time and End Time range.
   Select a time-based search	Click Time-based search. To use the PI Manual Logger database server time setting, select the Server Time checkbox. Deselect the checkbox to use your local computer time setting. In Start Time, enter the starting time of the range, using PI time syntax. The default value is 10 days prior, entered as a time offset (*-10d). In End Time, enter the ending time of the range, using PI time syntax. The default value is the current time (*).

4. To implement the new search criteria, click OK.

   The Previous Values tab is refreshed with the results of your search.