Connector
To configure the connector, from the Project Explorer select Connect, Connectors.
Click Add
Select Kepware, KEPServerEX Real-time values (OPC DA)
Click OK

Primary Server
These settings define the Name and Node of the OPC DA server. Typically, the Name is defaulted correctly. If the KEPServerEX server is on the local machine, leave local checked, otherwise uncheck, and specify either the name or IP address of the machine where KEPServerEX is running.
Use the Test Connection button to verify a connection to the server.
Secondary Server
These settings define the (optional) secondary KEPServerEX to connect to if a connection to the Primary Server fails.
Settings
For information on the specific settings, see the DATA CONNECTIVITY, OPC document.