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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.
Standard WinCC OA HTML pages
Trouble-shooting the WinCC OA system with the HTTP Server

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.
- Manager Service API (MSA) – High-Level Overview
  The Manager Service API (MSA) is the backbone for seamless, protocol-independent communication and logic reuse between WinCC OA managers, supporting modern distributed and web-integrated SCADA architectures.
- COM
  COM - Microsoft Interface 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 / WinCC V8) and web applications (WinCC OA Dashboard) in real production environments.
- webserver.js
  webserver.js is a Node.js-based web server that provides a modern, extensible backend for full-stack web applications in WinCC OA.
- 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 [restRporting] enabled.
- 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.
eLearning
Build Your Expertise Step by Step
Documentation
Basic information about terms and functions within the documentation.
Support & Services
An experienced team of support agents, consultants and trainers are ready to facilitate active partnerships with our customers, so they can profit from our comprehensive service.
Disclaimer
A brief clarification of liability exclusions or legal notices.
SIMATIC WinCC OA World
Explore the World of WinCC OA and Stay updated with the latest product news

Trouble-shooting the WinCC OA system with the HTTP Server

This HTML page is used for remote diagnostics of the WinCC OA system.

This option is only visible under Windows!

HTML diagnostics page — Figure 1. HTML diagnostics page

For redundant systems this page displays the same information for the second host in an additional table column. This page also displays the following tables with information:

General information display (see above)

Login information

Displays all active user interfaces with the logged in users and their login time.

DIAG LOGIN

Registered managers

Displays all currently active managers with manager number, host name where the manager runs, starting time and number of telegrams sent to and from the Event Manager (see WinCC OA diagnostics and Diagnostics panels. Edit an Update time for the connections in the latter panel, otherwise no messages will be displayed).

DIAG MANONLINE

Manager versions

Displays all available WinCC OA managers with version number and date of creation.

DIAG MANVER

Download manager logfiles

Download facility for WinCC OA logfiles. After selecting the logfiles and clicking "Create ZIP files " the individual ZIP files are listed for download.

DIAG LOGFILES

For Linux, Zip.exe is included in the current SuSE distribution, for example, in SuSE 6.3 in the "zip-2.2-51" packet. You can also download Zip.exe from the Web.