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Business Logic / Control
Endless possibilities in data processing for your projects.
Types of Control Functions
An overview of the types of functions distinguished within Control.
Error Functions

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Business Logic / Control
Endless possibilities in data processing for your projects.
- Introduction to CTRL
  An introduction to the product's own programming language Control(CTRL).
- Control Classes
  The overview of classes available in Control.
- Types of Control Functions
  An overview of the types of functions distinguished within Control.
  - 32/64 bit Functions
  - Administration of Managers, Modules and Panels - Functions
  - Alert Handling Functions
    These functions are associated with datapoints and respond to alerts and changes to alerts.
  - AlertService Functions
    These functions provide alarm shelving, suppression, and out-of-service capabilities via the AlertServiceClient class.
  - Blob Functions
  - Communication functions
  - Connection Functions
    Connection functions can be used to establish connections to alerts, datapoints and system events.
  - Crypthographic Functions
  - Database Functions
  - Datapoint Functions
  - Error Functions
    - clearLastError()
      Allows to clear the last error which has been raised in WinCC OA.
    - errorDialog()
      Displays an error dialog.
    - getErrorCatalog()
      Returns the error catalog (.cat) from the error class.
    - getErrorCode()
      Returns the error code from the error class from getLastError().
    - getErrorDpName()
      Returns the datapoint name from getLastError().
    - getErrorManId()
      Returns the manager identifier from getLastError() from the error class.
    - getErrorPriority()
      Returns the priority of the error from getLastError() from the error class.
    - getErrorStackTrace()
      Returns a dynamic string containing the stack trace (call stack) of an occurred exception.
    - getErrorText()
      Returns the text part of an error message string from the error class (e.g. "no authorisation").
    - getErrorType()
      Returns the type of error from getLastError() from the error class.
    - getErrorUserId()
      Returns the identification number of the user from the error class from getLastError().
    - getLastError()
      Gets the last error that occurred.
    - getLastException()
      Gets the last exception that occurred during processing of the function.
    - makeError()
      The function returns an error (in an errClass variable) and shows an error message or an information message in accordance with the _errors.cat error message catalog in <wincc_oa_path>/msg/<lang>or an error or information message according to your own error catalog. If you use the first alternative in the example further on, you have to use the _errors.cat catalog. The second alternative allows you to use your own catalog file with your own error or information messages. In this way, the function can be used to handle own errors and to display own error and information messages.
    - throwError()
      Passes a WinCC OA error to the internal error handler.
  - File Functions
    File functions allow you to import, export, open, close, and manipulate files within the application. This topic describes how to use file functions and important considerations for cross-platform compatibility.
  - Graphics Functions
  - Help Viewer Functions
    Available Functions for the Help Viewer.
  - HTTP Functions
  - Input Event Recorder Functions
  - Licensing Functions
  - Mapping Functions
  - Mathematical Functions
  - MindSphere Connector Functions
  - Miscellaneous Functions
  - Multilingual Functionality
  - Project administration Functions
  - Query Functions
  - Redu/Dist Functions
  - Selection and Configuration Dialogs - Functions
  - Semaphore Functions
  - String Functions
  - Subscription-based Licensing Functions
    CONTROL functions for querying information from subscription-based licenses.
  - System Tray
  - Time Functions
  - Threads Functions
  - User Administration Functions
  - Vector / Dynamic arrays - Functions
  - Waiting Control Functions
  - Window Functions
    This chapter lists all functions used to control windows and panels, such as ChildPanelOn, LayerOn, LayerOff, PanelOff, RootPanelOn, SwitchLayer, ZoomModule, and related dialog and module operations.
  - XML Control Extension Functions
- Control Graphics
- CONTROL Functions
- CtrlExtension
  The CtrlExtension allows the addition of custom C++ code.
- CTRL Debugger
  You can use the CTRL debugger to debug the Control programming language. The debugger can be used via its own panel, which also enables the monitoring and setting of variable values during the execution of a script.
- SQL in CONTROL
  The database functions enable you to quickly carry out value queries on datapoints and elements.
- 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.
- API Manager
  The WinCC OA API (Application Programming Interface) offers a number of functions adding special Managers to this process control system.
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Detailed and extensive content for special project adaptation.
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Basic information about terms and functions within the documentation.
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Error Functions

Using these functions you can read and handle errors that arise in functions with error handling capability.