The other typical use of QuickOPC-UA is to place it on the Web server inside a Web application. The Web application provides HTML pages to the client’s browser, runs in a Web server, such as Microsoft IIS (Internet Information Server), and is written using tools and languages such as ASP.NET (using C#, Visual Basic.NET, or other .NET language).

The Web application uses the types from QuickOPC-UA object model, and accesses data within OPC servers that are located on remote computers on the same LAN (Local Area Network). The communication with the target OPC server is performed by means of Web Services. No OPC-related (or indeed, Microsoft-related) software needs be installed on the client machine; a plain Web browser such as Internet Explorer (IE) or Firefox is sufficient.

The following picture shows how the individual pieces work together: