Home
Web Connectivity / Network Interfaces
Data exchange, APIs and web technologies
HTTP Server
The HTTP Server integrates Internet technologies directly into WinCC OA . Implemented as an add-on for the Control Manager, possible applications are many and diverse. The HTTP Server can be used as a web server for static HTML pages including download facility or to generate dynamic HTML pages.

Version Information
Release Notes, Update information, Certifications and Frequently Asked Questions.
Concepts
Your first step into modern and powerful process visualization.
Deployment
Topics, you need to know, before using WinCC OA.
Security
Go beyond the norm in cybersecurity.
Engineering
Powerful tools for easy or complex engineering tasks.
Data Management
Classify, structure and archive your data.
Business Logic / Control
Endless possibilities in data processing for your projects.
Data Visualization
User interfaces, Trends and Reports for every purpose and device.
Southbound Interfaces
The process connection to the actual machines/sensors.
Northbound Interfaces
Your portal to the cloud or supervising systems.
Web Connectivity / Network Interfaces
Data exchange, APIs and web technologies
- APIs
  An overview of the APIs (Application Programming Interface) available in WinCC OA.
- COM in WinCC OA
  COM stands for Component Object Model, a specification for developing modular software components which can be used by each COM compatible application. COM components can be easily integrated in such applications and can even be removed from an application at run time. COM components can be programmed in various different programming languages although C++ is used mostly. The specifications OLE, ActiveX and DirectX are based on the COM technology.
- Prometheus Interface
  The Prometheus interface (also referred to as Prometheus client) serves as a bridge between WinCC OA and Prometheus. It facilitates the retrieval, processing, and exposure of data from the WinCC OA system to a Prometheus-compatible format. This allows Prometheus to monitor and alert based on the data fetched from the WinCC OA system.
- SIMATIC PLC Discovery
  In increasingly dynamic automation environments and the merging of IT with OT, the SIMATIC PLC Discovery can help with the connection of newly added S7/S7+ devices by showing you all the devices in the network
- WinCC OA JavaScript Manager for Node.js
  The WinCC OA JavaScript Manager for Node.js is a manager that allows for the integration of the TypeScript/JavaScript runtime environment Node.js® into WinCC OA.
- SIMATIC Unified AR (Augmented Reality)
  SIMATIC Unified AR is an industrial Augmented Reality app that allows to display and operate HMI screens (WinCC Unified) and web applications (WinCC OA Dashboard) in real production environments.
- HTTP Server
  The HTTP Server integrates Internet technologies directly into WinCC OA . Implemented as an add-on for the Control Manager, possible applications are many and diverse. The HTTP Server can be used as a web server for static HTML pages including download facility or to generate dynamic HTML pages.
- XML-RPC
  XML-RPC (Extensible Markup Language Remote Procedure Call) allows software on different operating systems to make procedure calls over the internet. XML-RPC uses HTTP for the transport and XML for the encoding. It sends the procedure call to a remote server through HTTP. The call is an XML document and it receives the response as XML.
- REST Reporting API
  The REST Reporting API is integrated into the Standard web server and can be activated via the config entry enabled in the [restReporting] section.
- Distributed systems
  Distributed systems in WinCC OA allow to connect two or more autonomous WinCC OA systems via a network.
- Dist-Management
  Configuring and maintaining a distributed system in WinCC OA requires a high amount of engineering effort due to a high number of settings and configuration steps that must be applied on several systems. The Dist-Management reduces the engineering effort and simplifies the necessary settings.
- XMPP
  XMPP (formerly Jabber) is mostly used in chat (instant messaging) applications and allows near real time communication between two or more parties. It can, e.g., be used to push information from a WinCC_OA project server to one or more persons, even allowing the recipient to send a confirmation back to the server.
User Management
All about authorization, authentication and login-customization.
Availability
How to get your system uptime to the maximum.
Reporting
Create state of the art project reports without limits.
Addons
Useful tools and enhancements for special demands.
Reference Tables
Detailed and extensive content for special project adaptation.
Videos & Tutorials
Explore the capabilities of WinCC OA with our carefully selected collection of video tutorials and guides.
WinCC OA Documentation
Basic information about terms and functions within the documentation.
Disclaimer
A brief clarification of liability exclusions or legal notices.

HTTP Server

The HTTP Server integrates Internet technologies directly into WinCC OA . Implemented as an add-on for the Control Manager, possible applications are many and diverse. The HTTP Server can be used as a web server for static HTML pages including download facility or to generate dynamic HTML pages.

This allows you to make data from WinCC OA available to many users at the same time. The complete WinCC OA programming language Control is thus available for server-side scripting tasks. Thanks to the transparent architecture, you can implement cross-platform functions for a range of terminal devices, including WAP/WML units.

A number of standard functions (HTML pages included) add to the observation applications of WinCC OA and can be used as examples for your own solutions. Individual customization is facilitated by means of an existing framework that you can adapt visually and functionally to your application requirements and any AddOns.

To minimize the threat of an unauthorized access to the web server using a brute force attack, an increasing time-out (1,2,4,8,16,32,60 seconds) has been added after an authentication error. Only after the time-out interval a new try for authentication can be done.

If available the communication of the HTTP server is redirected to the HTTPS channel.

Advantages of the HTTP Server:

Provide custom HTML pages incorporating data from WinCC OA for intranet/Internet.
WEB alert screen with acknowledge function and free choice of filters.
Diagnostics page displaying hard disk capacity, RAM, processor usage, alert throughput, users logged in and more.
"HTML references" allow you to replace $parameters at runtime without any special knowledge of HTML, that is, you can query any data points through the Internet.
Querying WinCC OA data using SQL
Transfer static HTML pages
File transfer (HTTP download).
HTTP Server uses WinCC OA specific tags in HTML.

HTTP Server functions (see HTTP Server Control functions