CIRCUTOR OPC Server PS/PSS - Manual (Page 20)

PS/PSS OPC Server -20-
If you attempt to set an active configuration when the OPC server is deactivated,
the program will ask you if you wish to activate it, displaying the following message:
Activate OPC server ask message
If you click “No”, the configuration will be set but the server will remain deactivated.
If you click “Yes”, the application will start the server with the new active configuration:
Wait process window: activating server and establishing configuration
Eventually, the application will notify you that the configuration has been
successfully set by displaying the following message:
Set configuration success message
3.8.- Funcionamiento OPC Server en modo Tunnelling
Although communication OPC-DA offers severals adventages in the exchange of
information between applications, there is an important limitation when we want to
comunicate two machines in diferent domains or through Internet. These limitations are
imposed by DCOM tecnology in which is based OPC-DA communication.