1.4. Connect from an OPC client
When you start an OPC client it should immediately connect
to the OPC DataHub, because the DataHub is preconfigured to act as an OPC
server. If the DataHub is not running, the OPC client will attempt to
If your client does not connect, you can
check the DataHub configuration as follows:
- Right click on the DataHub system-tray icon and choose
In the Properties window,
Ensure that the box is checked.
If your OPC client requires that you hand-enter the
OPC server name, use either
The option tells the OPC DataHub not
to alter its registry settings. This is useful if you
want to use the OPC DataHub with a redundancy server or some
other program that modifies the DataHub's registry
independently. Without this box checked, the DataHub will
overwrite any external changes when it starts or when a
change to the status is applied.
These two boxes work together, because turning
the OPC server behavior on or off necessarily makes
changes to the registry. Here is how you can change
OPC server behavior when you also need to maintain
- Uncheck . This will make the checkbox visible.
- Check or uncheck the as needed, and click
- Check and click .
- Click button at the
bottom of the Properties window to apply the change.
You can view connections with the Connection
Copyright © 1995-2010 by Cogent Real-Time Systems, Inc. All rights reserved.