Including Alarm Data in Archive Backups

About this task

When backing up your Historian archives, any alarms that have a life cycle that overlaps the data archive being backed up will be included. This means that an alarm with a long life cycle can be included up in multiple backups. For example, say the following alarm and archive dates were the following:
Alarm/Data ArchiveStart TimeEnd Time
Alarm1 09/02/2004 09/06/2004
Archive109/01/2004 09/03/2004
Archive2 09/03/2004 09/04/2004
Archive3 09/04/2004 09/06/2004
If any or all of these archives are backed up, Alarm1 will go into the backup for each one. When the archives are restored, Historian will analyze the included alarm data and, if the data is already in the Historian archive, is intelligent enough to know it already has the alarm.

Use the following procedure to change alarm timestamp checking.

Procedure

  1. From the Start menu, select Run and enter Regedit.
  2. Open the following key folder HKEY_LOCAL_MACHINE\SOFTWARE\Intellution, Inc.\iHistorian\Services\DataArchiver\
  3. Create a new DWORD called AlarmTimestampCheck and set its value to 1.
    Set AlarmTimestampCheck to 2 for slower timestamp checking. Set AlarmTimestampCheck to 0 to disable timestamp checking entirely.
  4. Select OK.
  5. Close the Registry Editor
  6. Open Historian Administrator.
  7. Restart the Data Archiver for the changes to take effect.