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Version Information
Release Notes, Update information, Certifications and Frequently Asked Questions.
Frequently Asked Questions
A collection of common customer questions
REDU

Version Information
Release Notes, Update information, Certifications and Frequently Asked Questions.
- What is WinCC OA?
- Release Notes Version 3.20
  All the new features and changes in WinCC OA V3.20.
- Update Release Notes
- Notes for Upgrading a WinCC OA Project
  Important steps and information to consider when upgrading an existing WinCC OA project to the latest version.
- WinCC OA Version Incompatibilities
  A list of all incompatibilities that needed to be introduced between different versions of WinCC OA.
- Product Certifications
  An overview of WinCC OA's certified standards
- Frequently Asked Questions
  A collection of common customer 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
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.

REDU

How can I use the Mobile UI in redundant systems?

When using a redundant system, you have to create a remote project and start a new control manager for the Mobile UI server. This remote project has to be connected to the redundant servers. Note that a redundant mobile app server as well as distributed systems are not supported.

How to get the information whether a recovery of the redundant system is running

The information as to whether a recovery is running in a redundant system is stored in the _ReduManager(_2).IsRecovering. data point element.

The DPE is set by the server performing the active recovery. The server performing the passive recovery is the starting system and does not write to the DP elements.

When the recovery is started, the value 1 is written to the system performing the active recovery. The value 2 is written to the DP element of the other system.

The value 0 is set for both DP elements when the recovery is completed for the database and between the Event Manager on both servers.

Server 1 is running and server 2 is started

Server 1 = active recovery

Server 2 = passive recovery

_ReduManager.IsRecovering = 1

_ReduManager_2.IsRecovering = 2