8.3. OPC

Cascade DataHub™ : Version 5.4
	Chapter 8. Properties Window

This option in the Properties Window lets you set up the Cascade DataHub to act as an OPC server, an OPC client, or both simultaneously.

OPC Client

Check the Act as an OPC Client box for OPC client functionality. Since the Cascade DataHub can be a client to more than one OPC server, you need to specify server information for each OPC client connection. To add a server, click the Add button and fill in the fields in the Define OPC Server Window:

This is what must be entered:

Connection Name: A name used by the Cascade DataHub to identify the connection. There should be no spaces in the name. It doesn't matter what name is chosen, but it should be unique to other connection names.
Computer Name: The name or IP address of the computer running the Cascade DataHub.
OPC Server Name: The name or IP address of the server computer.
Domain Name: The name of the DataHub domain in which the data points are received.
Maximum update rate (milliseconds): This option lets you specify an update rate, useful for slowing down the rate of incoming data. The default is 0, which causes values to be updated as soon as possible.

To edit a server, double-click it or select it and press the Edit button, and edit the fields described above. To remove a server, highlight it and click the Remove button.

OPC Server

Check the Act as an OPC Server box to have the Cascade DataHub function as an OPC server.

COM Security

Check this box to relax COM security. This setting will override the COM permission settings for the application, but will not override the system's global COM restrictions. It is common for OPC servers to operate at minimal DCOM security settings, since high security interferes with connectivity and most control systems do not operate in hostile network environments. If in doubt, consult your system administrator.


8.2. DDE		8.4. Mirroring