Before you import

Using the tag importer functionality from within the Operations Control Management Console, you can import topic and other configuration data from one or more InTouch nodes. There are several factors that contribute to effectively importing tags from multiple InTouch nodes into the AVEVA Historian database.

• Determining import order

• Duplicate tags or addresses

• Import limitations for topic names

• Editing machine names

• Reimporting

• Importing information for DDE I/O Servers

• Holding database

The AllowOriginals system parameter needs to be set to 1 before importing .lgh original data.

Be sure to close InTouch WindowMaker before importing the Tagname.x file.

Note: Copying or moving an InTouch application in edited mode from one node to another node causes the application to be locked.

Although you can import from multiple InTouch nodes, only one application from each InTouch node may be imported. That is, you cannot import an InTouch node with the same computer name as one you have already imported. However, you can import a Tagname.x from a repository and then edit the node name location. If you delete the application from the Historian, you can import a different application from the same InTouch node.

When you delete an application from the Historian, all tag information, annotations, snapshots, and summaries are deleted. Although the stored history data is not deleted from the history blocks, it is no longer accessible. If you perform a reimport, the existing history data already in the Historian is accessible again.