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Data Visualization
User interfaces, Trends and Reports for every purpose and device.
User Interfaces
All the available options for visualizing WinCC OA.
WebUI Runtime
The WinCC OA WebUI Runtime is a production-ready web application foundation for building industrial user interfaces.
Glossary
Key terms and technologies used in the WebUI Runtime.
Shared Worker

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.
- User Interfaces
  All the available options for visualizing WinCC OA.
  - User Interface (VISION)
    A full-featured desktop client for Windows and Linux with panel engineering, scripting, and complete access to all WinCC OA functions.
  - WebUI Runtime
    The WinCC OA WebUI Runtime is a production-ready web application foundation for building industrial user interfaces.
    - Architecture and technology
      The WebUI Runtime provides a framework for building custom web-based standalone pages that connect to WinCC OA via WebSocket.
    - Requirements and Installation
      This topic covers the software requirements, installation of the development environment, and build and deployment process for the WebUI Runtime.
    - Customization
      The WebUI Runtime supports custom branding, theming, navigation layout, and application configuration.
    - Standalone Pages
      Use this procedure to create a custom standalone page and register it in the navigation menu.
    - Datapoint Connectivity
      The WebUI Runtime connects to WinCC OA datapoints through the library, enabling live data display and control actions.
    - Example: Smart City Dashboard
      This example illustrates how to use the WebUI Runtime to build a multi-page web application with live datapoint connectivity, alarm handling, trend visualization, and custom branding.
    - AI-assisted page creation
      AI coding assistants can accelerate WebUI Runtime development when provided with the right project context and technical rules.
    - Glossary
      Key terms and technologies used in the WebUI Runtime.
  - Dashboard
    A widget-based web application for real-time monitoring, visualization, and interaction with WinCC OA project data.
  - Desktop UI
    A cross-platform remote client that provides the native UI experience on Windows and Linux without local project installation.
  - ULC UX
    An HTML5-based client that renders existing panels in any modern browser, enabling remote access without additional installation.
  - Mobile UI Application
    A native mobile application for iOS and Android providing remote access to plant data from smartphones and tablets.
  - Remote UI
- System Overview
  A panel for the diagnostics of a WinCC OA system.
- Alert and Event Screen (AEScreen)
  The alert and event panel (AEpanel) in WinCC OA is a standard panel and allows displaying alerts and events in table format.
- Variable Trend
  A set of panels and scripts used for the simplified display of trend curves and trend groups (up to 16 trend curves).
- Standard Symbols (STD_Symbols)
  Symbol library consisting of graphics objects for the quick display and design of system diagrams.
- Standard Object Library
  The WinCC OA Standard Object Library (in short: Stdlib) is a base framework that facilitates the creation and use of WinCC OA Libraries. The Stdlib provides templates for creating WinCC OA Libraries and offers a vast range of functions that make the use of a WinCC OA Library in a WinCC OA project easier.
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
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

Shared Worker

A Shared Worker is a browser API that allows multiple browser tabs or windows to share a single background thread. In WinCC OA, the OaRxJsApi uses a Shared Worker to maintain exactly one WebSocket connection to the backend, shared across all open tabs. This architecture reduces resource consumption and license usage compared to per-tab connections. The Shared Worker handles JWT-based authentication and token refresh, heartbeat monitoring with automatic reconnection, round-robin server failover for high availability, and reference-counted datapoint subscriptions that automatically clean up when no consumer remains. The Shared Worker is used by the WebUI Runtime, the Dashboard, and other web-based applications that connect via the OaRxJsApi.