Explanation of Historian Server Tag Counts

SUMMARY

When viewing the Status of a Historian Server in the Operations Control Management Console (OCMC), several tag count line items are visible:

This tech note will provide an explanation of those line items.

APPLIES TO

• Historian Server

EXPLANATION

• Licensed tag count: The total number of tags you can configure for data retrieval in AVEVA Historian.  This number is derived from the currently assigned Historian Server license.
• Allocated tag count license: The number of licensed tags current allocated to the Historian Server.  Licensed tags are allocated in blocks of 50, up to the total number of licensed tags.
• Total tags defined: The number of tags defined in the Historian Server.  Includes both licensed tags as well as tags that do not require a license such as System tags.
• Tags requiring a license: The number of defined tags that require a license.  This should be less than or equal to the Allocated Tag Count from above.
• Total tag count available: The number of remaining “unused” licensed tags.  This number is calculated by subtracting the Allocated Tag Count from the Licensed Tag Count.