Configure the Wonderware Historian Driver Server Setting

Before you can use the Wonderware Historian driver, a system administrator needs to configure a setting on each server on which ClearSCADA is running.

A system administrator has to:

1. Specify a Folder for the HCAL Store-and-Forward Cache.
2. Apply the changes to the server.
3. If the server is currently running as the main server, restart the driver for the changes to take effect.
   NOTICE

   LOSS OF DATA

   If you change the store-and-forward folder while the cache contains data, then this data will be lost. This will occur unless you move the existing folder to the new location while ClearSCADA is shutdown. For this reason, we recommend that you specify the store-and-forward cache folder before you start to export data.

   Failure to follow these instructions can result in loss of data.
4. Repeat steps 1 to 3 for each server on your system.