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.
- MQTT Publisher
  The MQTT publisher provides a northbound data interface for MQTT clients to data point values within the WinCC OA project.
- Node-RED
  Node-RED is a flow-based programming tool that allows the creation of applications in a graphic environment.
- OPC UA Server
  The WinCC OA OPC UA Server provides an OPC UA interface to access WinCC OA data point values, alarms and historical data.
- OPC Server
  The OPC Server enables the communication with OPC clients.
  - Requirements for the OPC Server
  - Accessing WinCC OA data
  - Establishing communication
  - [opcsrv]
    General settings for the OPC DA server.
  - Mapping the WinCC OA status bits
  - _OPCPvssServer
  - Summary and relevant links
- OPC HDA Server
  The WinCC OA OPC Historical Data Access (HDA) Server is used for the exchanging of archived process data of the WinCC OA project.
- OPC Alarms & Events
  OPC Alarms & Events (brief OPC A&E) is in addition to the Data Access another standard in order to implement a central alert management manufacturer spanning. OPC A&E is used to guarantee the coupling with other control systems as well as to display alerts and events in a hierarchical system
- Modbus/TCP Server
  The Modbus/TCP server provides the possibility for Modbus/TCP clients to query data from a WinCC OA system and arrange the data within a Modbus data model.
- SNMP
  SNMP (Simple Network Management Protocol) is a protocol for monitoring network devices (servers, workstations, routers, switches and hubs etc.) and their functions. It allows you to administer your network.
- OLE DB Provider
  OLE DB is a Microsoft specification for accessing data on different computers. It is based on Microsoft's COM technology and is the successor to the older and limited ODBC technology.
- Insights Hub Connector
  The Insights Hub connector allows you to upload data from WinCC OA to Siemens Industrial Cloud Insights Hub and to process data. WinCC OA supports the integration of SCADA data from WinCC OA to Insights Hub.
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.
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.

Mapping the WinCC OA status bits

The OPC server maps the following WinCC OA bits onto the OPC Quality bits, which the OPC client evaluates:

If _online.._bad = FALSE, i.e. the value is valid, then it is set according to _online.._default:

FALSE (0): good, non-specific (110000LL)
TRUE (1): good, local override (110110LL)

If, on the other hand, the value is invalid, i.e. _online.._bad = TRUE, then both _online.._default = TRUE or = FALSE are mapped onto bad non-specific (000000LL).