Third-party OLEDB client connections require a license in order to connect to ClearSCADA. There are two types of licensing available:
- Client licensing—The third-party client is associated with a license file provided by Schneider Electric (sent electronically as a file or stored on a hardware dongle). The content of the license file defines:
- The amount of time for which the client can connect to systems via the third-party OLEDB client - system connection. When this time period passes, the license expires and a new license will be required
- The versions of ClearSCADA to which the OLEDB client can connect (via the connection)
- The number of ClearSCADA systems to which the OLEDB client can connect.
If a client license is to be used, the client licensing feature needs to be enabled for the connection Enable or Disable Client Licensing. You will need to associate the client with a license file. If the license file is invalid or missing, the client will attempt to use server licensing instead.
The settings for your client license are determined when you purchase ClearSCADA. Contact your ClearSCADA agent for information about the specific limits of your license.
- Server licensing—The third-party client uses one of the server’s licenses. Each server is allocated a pre-determined amount of data access licenses which can be used by clients. For example, if a server has 20 licenses, it can allow up to 20 clients to connect to ClearSCADA using one of the server licenses. Each client that is not using client licensing uses one of the available server licenses. If there are no available server licenses, clients without client licenses will not be able to connect (until some of the server’s licenses become available again).
If a client has a client license, this is used in preference to a server license. If the client license file is missing or corrupt, a server license will be used instead (even if the client licensing feature is enabled).
If the client licensing feature is disabled, server licenses are the only licenses that can be used.
If you have enabled client licensing, you will need to associate the third-party OLEDB client - system connection with a client license file:
- Access the ClearSCADA Client Configuration window Display the ClearSCADA Client Applet.
- Select the third-party OLEDB client - system connection in the list of connections.
- Select the Licenses button to display the Client Licensing window.
- Use the browse button next to the License File field to browse to the .lic license file supplied by your ClearSCADA vendor. Select the .lic file, then select the OK button to close the browse window and confirm your selection.
You will see that the details of the license are shown in the fields on the Client Licensing window. Your Third Party OLEDB client will be counted against the Data Access Systems limit. So, if your license has a Data Access Systems limit of 10 and this is the first OLEDB client connection, you will be able to add a further nine OLEDB connections.
- Select the Apply button to instigate the license settings.
- Select the OK button to confirm your choices and close the Client Licensing window.
- Select the Close button to exit the ClearSCADA Client applet.
If the connection has been configured correctly, and the network is healthy, ClearSCADA should now be available to your OLEDB application.
Further Information
Check the Status of a Third Party OLEDB Client - System Connection.