OPC Data Hub licensing follows a relatively simple model because when you buy an OPC DataHub Node License, all the features of OPC DataHub are there. The places where additional licenses are needed is when you start connecting multiple machines together. This page should help explain basic usages and clarify those scenarios that need optional licenses:

Have a question about licensing? Please call +1 704 849-2773 or email.

Advanced Examples:

Java Applet Web Connections to DataHub

• A web page that uses Java applets to display live data from the DataHub will establish a TCP/IP connection directly to the DataHub.
• This means that you will need a DataHub TCP Link License for each simultaneous web page connection. For example, if you have 5 people viewing your Java applet page at the same time, then you will need 5 x DataHub TCP Link Licenses (installed on the DataHub computer).
• You can choose to serve the Java applet pages using the DataHub Web Server, or you can install a third party web server on the same computer as the DataHub. If you choose to use the DataHub Web Server, then you will need a DataHub Web Server License in addition to your DataHub TCP Link Licenses.
• We also offer a special DataHub Unlimited TCP Link License which enables unlimited TCP/IP connections to the DataHub. This unlimited license is used by customers who want to make their Java applet pages available to everyone on the web.