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System Management
The System Management is the central administrative unit for WinCC OA Systems.
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Variable Trend
A set of panels and scripts used for the simplified display of trend curves and trend groups (up to 16 trend curves).
Tips and Tricks for the Variable Trend

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Topics you need to know before using WinCC OA.
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Engineering
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- Project Administration
  The chapter contains a description of the process monitor as well as the project administration.
- Graphics Editor (GEDI)
  Used for creating and editing panels, provides tools for creating and configuring graphic objects.
- System Management
  The System Management is the central administrative unit for WinCC OA Systems.
  - System management
  - Diagnostics
  - Reports
    - Variable Trend
      A set of panels and scripts used for the simplified display of trend curves and trend groups (up to 16 trend curves).
    - Correction Values and Laboratory Values
      These panels can be used to change existing values (=correct), query values from and add new values too the HistoryDB and RDB.
    - Service protocol
    - WinCC OA Excel Report
      With the WinCC OA Excel Report reports can be created. Templates are used for reports. If a report should be created for a specific time, the system uses the templates and automatically fills the template with data from the process database. Reports can also be created, printed and saved time-controlled without user access. For more information, see chapter Excelreport/topics/excel_report_basics.html.
    - SQL in CONTROL
      The database functions enable you to quickly carry out value queries on datapoints and elements.
    - Datapoint Element Monitor
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- Wizard Framework
  Used for easy creation of wizards in a uniform layout style. The key elements "Navigation Bar" and "Bottom Bar" can be customized to fit the needs of the custom wizard.
- XML Panel Format
  The XML (Extensible Markup Language) panel format allows creating WinCC OA panels.
- Simple Symbols, basics
  The "Simple Symbols" functionality is used to simply assign corresponding symbols to datapoint types and increase the working comfort when working with different symbols.
- ScriptWizard
  Simple wizard for creating graphical user interfaces for users without prior programming knowledge.
- Panel topology/Group alert facility
  Tree structure for process panels with integrated group alert system
- Object-Oriented Panel References
  Reusable objects built with the GEDI tools. Insert them within an existing panel to provide a graphical element.
- Multilingual Projects
  WinCC OA is designed to provide both Native Language Support and Multi Language Support.
- Translator
  The WinCC OA Translator functionality supports you in creating and maintaining multilingual projects. It offers a convenient interface for translation of reusable terms.
- Layout management
  Layouts change the size and position of objects according to parameters previously defined in the GEDI.
- Generic Dialog Framework
  The Generic Dialog Framework is an easy way to generate your own dialogs by adjusting a set of prefabricated panels.
- Simple Configuration
  Simple configuration windows and panels support you in combining events (such as a mouse click) with different actions such as setting datapoint values, showing panels or changing attributes.
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.
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Explore the capabilities of WinCC OA with our carefully selected collection of video tutorials and guides.
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Basic information about terms and functions within the documentation.
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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.
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A brief clarification of liability exclusions or legal notices.
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Tips and Tricks for the Variable Trend

Predefined trend display groups "MIN-MAX", "ALL"

Two predefined curves enable you to work with the Variable Trend.

When called correctly, the "MIN-MAX" trend display group shows a trend display depicting a black measured value, the red minimum and the green maximum curve.

The function call for a compressed datapoint "TEST" would be:

openTrendCurves("MIN-MAX",-1,makeDynString("$CURVE1:TEST.C1.AVG","$CURVE2:TEST.C2.MAX","$CURVE3:TEST.C2.MIN"));

The Variable Trend automatically opens and displays in a new module.

The trend display group "ALL" contains 8 predefined curves that you can use to display 8 datapoints. Permissible compression levels are C1...or C? or C? + 1. C? provides all datapoint compression levels (see "AUTO" compression level).

VarTrend display of historical and live C1.AVG_WT0 data

The VarTrend provides a seamless display of C1.AVG_WT0 datapoint values by integrating both historical and live data.

When a C1.AVG_WT0 datapoint is selected:

Historical values are displayed using data from the C1.AVG_WT0 DPE archive.
Live values from the .value DPE are displayed from the moment the VarTrend panel is opened onwards, ensuring real-time representation.

This functionality is only active when the config entry [ui] vtMixComprAndCurrentValues is set to 1.

Additionally, when a C* value (e.g., C1, C2, etc.) is selected in the VarTrend, the downsampling feature is automatically deactivated and disabled to ensure accurate representation of the specific compression level.