Migrating the Alarms and Events Data
If you have upgraded Historian, you must migrate the alarms and events data as well. Only then you can retrieve the data.
- If using Microsoft SQL 2008 or later, you can install Historian and its components, install a supported version of Microsoft SQL, and then migrate the data.
- If using a version earlier than Microsoft SQL 2008, you must first migrate the data to Microsoft SQL 2008, and then migrate it to a supported version of Microsoft SQL.
- Before upgrading to the latest version of Historian: In this case, you can use Historian Administrator of the older version of Historian to migrate the data.
- After upgrading to the latest version of Historian: In this case, you can use the Proficy Alarm Database Migration tool, which is provided with Historian.
This section describes how to migrate data using the migration tool.