Initialize Function

Executes contents on a model initialize event

  • Library:

  • Simulink / User-Defined Functions

  • Initialize Function block

Description

The Initialize Function block is a pre-configured subsystem block that executes on a model initialize event. By default, the Initialize Function block includes an Event Listener block with Event set to Initialize, a Constant block with Constant value set to 0, and a State Writer block.

Replace the Constant block with blocks that generate the state value for the State Writer block.

Conditionally executed subsystem blocks with output ports fully supported within Terminate Function blocks

For a list of unsupported blocks and features, see Initialize, 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.

Model Examples

Working with the Initialize Function, Reset Function, and Terminate Function Blocks

Working with the Initialize Function, Reset Function, and Terminate Function Blocks

Use the Initialize Function, Reset Function, and Terminate Function blocks to read and write states in a Simulink model.

Open Model
Reading and Writing States with the Initialize Function and Terminate Function Blocks

Reading and Writing States with the Initialize Function and Terminate Function Blocks

In this example, the Initialize Function block uses the State Writer block to set the initial condition of a Discrete Integrator block to 10.

Open Model

Block Characteristics

Data Types

Boolean[a] | bus[a] | double[a] | enumerated[a] | fixed point[a] | half[a] | integer[a] | single[a] | string[a]

Direct Feedthrough

no

Multidimensional Signals

limited[a]

Variable-Size Signals

no

Zero-Crossing Detection

no

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

Extended Capabilities

See Also

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Topics

Simulink Documentation

Support