Access a Tag

About this task

When you search for a tag, you can narrow down the search results further by performing a basic search or an advanced search.
Note: By default, maximum one million tags are retrieved. If the Historian clients are configured to retrieve more than a million tags, to retrieve all of them, add the MaxTagsToRetrieve registry key under HKEY_LOCAL_MACHINE\SOFTWARE\Intellution, Inc.\iHistorian\Services\DataArchiver\, and then set the maximum number of tags that you want to retrieve. Restart the Historian Data Archiver service for the change to reflect.

Procedure

  1. Access Trend Client.
  2. If you want to access all tags, select Tags > Search.
    The Tags Search window appears.
  3. If you want to access all tags, select .
    A list of all the tags in the Historian server appears. You can filter the list of tags by entering the name or description in the text box.
  4. If you want to perform an advanced search:
    1. On the Tags page, select Advance Search.
      The Advanced Tag Search window appears.
    2. Expand Select Tag Criteria, and enter values in the search criteria.
      Note: Supported wildcard characters in search are * and ?. The following table provides examples of searching using wildcard characters.
      Search String Result
      W* All tags starting with letter W
      *e All tags ending with letter e
      W*e All tags starting and ending with W and e respectively
      Tag? All four letter named tags, where the last letter can be anything
      W*0000? All tag names staring with W and ending with 0000 followed by any single letter
    3. Select Find Tags.
      A list of tags that match the search criteria appears.
      Note: Do not add or update the following spare configurations as the data may get corrupted or over written:
      • The Spare 1 field for OSI PI Distributor. OSI PI distributor reads data from the Historian tag displayed in the Tag Source Address field and sends it to the OSI PI tag name displayed in the Spare 1 field.
      • The Spare 5 field for Server to Server Collector and Server to Server Distributor as it is only used for internal purposes.

What to do next

To analyze the tag data, add it in a trend chart, current value table, value card, or a text box.