OPC Viewer Connection Establishment

To connect to OPC Server, select <Browse…> from the Server dropdown list.

Figure 1: OPC Viewer – main window

Click the Add icon in menu ( )

The Select Server window appears (Figure 2); select OPC Server from a local or remote computer (e.g. CAS.CommServer.OPC.Da.Server):

Figure 2: OPC Viewer – Select Server Window

If you want to connect to a server on a remote computer, select the computer and check what servers are available (to check available servers click on “+” next to the computer name). If the requested computer is not on the list it is possible to connect to this computer using its IP address written in the input box on the address bar:

opcda://computer_ip_address/progID_OPC_server

Note
Remember to configure DCOM properly before connecting to the other computer.

The added OPC server is not connected ( ).

You can add a multiple OPC server to the configuration. It can be the same OPC server or any other OPC server.

Figure 3: OPC Viewer – multiple OPC servers

Click the right mouse button on the added server and select “Connect” or click “Connect to Server” icon ( ) in the menu.

Figure 4: OPC Viewer – Connect

After successful connection to the OPC server, the icon changes to and we can create an online subscription.

Figure 5: OPC Viewer – successful connection

Note
When we are not connected to the OPC server we can create an offline subscription.

Now we can check the status of the connected OPC server. Click the right mouse button on the OPC server and select “View Status” or click icon ( ) on the toolbar.

The Server Status window appears:

Figure 6: OPC Viewer – Server Status