Browsing for Tags

About this task

By default, the Historian clients can return a maximum of 100K tags. If the Historian clients are configured to retrieve more than 100K tags, configure the maximum tags the search can return by adding the MaxTagsToRetrieve registry key.


  1. On the Start menu, select Run, type Regedit, and then select OK.
    The Registry editor appears.
  2. Open the following key folder: HKEY_LOCAL_MACHINE\SOFTWARE\Intellution, Inc.\iHistorian\Services\DataArchiver\
  3. Create a new DWORD called MaxTagsToRetrieve.
  4. Set the decimal value to a number greater than 100,000.
    The value that you enter represents the maximum number of tags the search can return.
    Note: The value should be more than 100K. If you entered a value less than 100K, then the search will return 100K tags by default.
  5. Select OK and then close the Registry Editor.
  6. To reflect the changes made in the registry, restart Data Archiver services.
    Note: You can also use the browse filter criteria to return just the specific tags you are looking for from the Historian Database.
  7. To get all the fields related to a tag, create a DWORD (32-bit) registry entry named GetAllTagProps for the collector, and provide the value 1. For IGS, the registry path is HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Intellution, Inc.\iHistorian\Services\OPCCollector\*_OPC_Intellution_IntellutionGatewayOPCServer