WinCC/Web Navigator

Operator control and monitoring via the web


The WinCC/Web Navigator allows you to perform operator control and monitoring of your plant via the Internet or an in-house intranet without the need for changes to the WinCC project.
In addition to the typical use in WANs (Wide Area Networks), low-cost applications can also be implemented. Examples of these are solutions in the water/wastewater industry with highly decentralized structure or applications with sporadic access to process information (building management). In addition to this, Web clients can also be used as normal operator stations on the LAN.


  • Parallel web-based operator control and monitoring (MS Internet Explorer)

  • Integrated configuration and user administration / access authorizations

  • User-specific functionalities, e.g. language, plant (unit) view

  • Fast update rates (e.g. after value change, picture change)

  • Minimum maintenance costs thanks to centralized software administration

  • High Internet security standards

  • Remote monitoring using the secure WinCC Web Viewer application

  • Flexible thin client solutions for a variety of platforms (PC, on-site panel, mobile PDA)

  • Efficient remote diagnostics with WebDiagnostics server/client

  • Increased security and availability due to separation of WinCC and Web server

  • Maximum availability and performance thanks to Web server farms (load balancing)

Design and function

For WinCC single-user systems or WinCC server/client systems, web-based solutions can be implemented with the WebNavigator. Operator control and monitoring of a WinCC project via the Internet or an intranet is possible from any Windows computers, which are referred to as WebNavigator clients.Only MS Internet Explorer is required on the client side. Simultaneous access to multiple Web servers and thus to multiple plants is even possible if this is started multiple times or its multi-tabbing functionality is used.

Abb. Web Navigator mit Multi Tabbing

Security concept made to order

All Web operator stations are integrated into the user administration of the system. Authorization levels govern whether an operator can simply monitor the plant (view only) or has partial or full authorization for operator control and monitoring. Every login and logout can be traced via system events. For applications with very strict security requirements, logout after a user-defined time span is just as important as the ability to disable key combinations when it comes to security. Furthermore, the WebNavigator supports all commonly used IT security mechanisms such as routers, firewalls, proxy servers, SSL encryption and VPN technologies.

Thin client solutions

Inexpensive but lower-performance Windows PCs, rugged on-site devices (e.g. SIMATIC Thin Clients) and mobile clients (PDA – Personal Digital Assistant) can be connected via thin client solutions with Microsoft Terminal Services. Only minimum requirements are placed on the hardware here because the entire application, i.e. including the WebNavigator client, runs on the terminal server.

Siemens offers rugged SIMATIC Industrial Thin Clients as operator terminals with high-resolution wide screen touch displays. These are optimally suited for use in harsh industrial environments.

Flexible remote diagnostics
The WebDiagnostics client was designed for maintenance and service of widely distributed plants. In this case, the Web licensing is made for a diagnostic client locally on a service computer instead of on the system servers. Through the diagnostic client, the service technician has secure access to any number of plants that have a WebNavigator server.

Dedicated Web server and Web server farms with load balancing

The WinCC Web Server can also be configured on a WinCC (SCADA) client for even more security and availability. Advantages of this solution:

  • Increased security and availability due to separation of the system server and Web server

  • Comprehensive Web solutions for multiple or redundant WinCC servers

Web server farms allow the number of Web clients to be increased as needed.
Advantages of this solution:

  • Higher performance through load balancing

  • Automatic switchover of the Web clients in the event a server fails

Load Balancing


  • A (server-based) license is required for the WebNavigator. This is a graduated license based on the number of simultaneous Web client accesses, which can be incremented at any time using additive Web client licenses..

  • The WebNavigator client software can be installed as many times as required without the need for a license.

  • A (client-based) license is required for the WebNavigator diagnostics. This provides access to all Web servers with WebNavigator server WebNavigator diagnostic server license.

  • Licenses of WinCC/WebUX and WinCC/WebNaviagtor can be combined if necessary

Software and licenses

Article No.

WinCC WebNavigator for WinCC RT Professional V14 and WinCC V7.4

WinCC WebNavigator Diagnostic client for WinCC RT Professional V14 and WinCC V7.4

WinCC Web Navigator up to V7.3

You can find more information about SIMATIC licenses, the Software Update Service, the topic Online Software Delivery and how you get supported by the tools Automation License Manager and SUS Manager at: