SIMATIC WinCC WEBDIAGNOSTICS Server for Runtime Professional Option for WinCC (TIA Portal) Runtime software, single license without software, without documentation License key on USB stick, Class A ******************************* Contents: 1x USB The WebDiagnostics client was designed for maintenance and service of widely dispersed systems. Web licensing does not take place on the system servers, but as a diagnostics client locally on a service computer. The diagnostics client gives service personnel secure access to any number of systems that have a WebNavigator server.