OPC Server Data SourceIf your data source is an OPC Server use Configure-Tags to define a Tag with a Data Source of OPC Item or you can use DirectOPC from the database.
View the following 1 minute video on how to connect to an OPC Server.
http://www.opcsystems.com/datasourceopcserverfast_video.htm
For a more detailed presentation of connecting to OPC Servers view the following 9 minute video.
http://www.opcsystems.com/datasourceopcserver_video.htm
View Configure Tags in the Quick Start and also the reference for Tags in this help file.