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Initialize Function

Execute subsystem on model initialize event

  • Library:
  • Simulink / User-Defined Functions

  • Initialize Function block

Description

The Initialize Function block is a preconfigured Subsystem block that executes on a model initialize event. By default, the Initialize Function block includes:

  • An Event Listener block with the Event type set to Initialize

  • A Constant block with the Constant value set to 0

  • A State Writer block with no State owner block set

Customize the contents of the Initialize Function block by, for example, replacing the Constant block with source blocks that generate the state value for the State Writer block and specifying a State owner block for the State Writer block.

Conditionally executed subsystems with output ports are fully supported within Initialize Function blocks.

For a list of unsupported blocks and features, see Initialize, Reinitialize, Reset, and Terminate Function Limitations.

The input and output ports of a component containing Initialize Function and Terminate Function blocks must connect to input and output port blocks.

The code generated from this block is part of the model_initialize function that is called once at the beginning of model execution.

You can select an Initialize Function, Reinitialize Function, Reset Function, or Terminate Function block or a corresponding state owner block to highlight blocks related to it. To show a related block in an open diagram or new tab, pause on the ellipsis that appears after selection. Then, select Related Blocks Related Blocks button from the action bar. When multiple blocks correspond to the selected block, a list of related blocks opens. You can filter the list of related blocks by entering a search term in the text box. After you select a related block from the list, window focus goes to the open diagram or new tab that shows the related block.

Block Characteristics

Data Types

Booleana | busa | doublea | enumerateda | fixed pointa | halfa | integera | singlea | stringa

Direct Feedthrough

no

Multidimensional Signals

yesa

Variable-Size Signals

no

Zero-Crossing Detection

no

a Actual data type or capability support depends on block implementation.

Extended Capabilities