Even when connecting locally, the application may run into the traditional difficulties of connecting to OPC servers. DCOM security settings on the machine can interfere with connections, and the OPC Core Components package must be properly installed before connections can be established.
Using Data from Classic OPC Servers
After a connection to a server has been defined, the server will appear along side of other OPC servers (both COM and UA based) in the OPC Tag Browser. You can use these tags like any other ones - bring them into Tags, use them in Transaction Groups, and so on.