While Iterator Subsystem

Subsystem that repeats execution during a simulation time step

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  • Library:

  • Simulink / Ports & Subsystems

  • While Iterator Subsystem block

Description

The While Iterator Subsystem block is a Subsystem block preconfigured as a starting point for creating a subsystem that repeats execution during a simulation time step while a logical condition is true. Open model.

Use While Iterator Subsystem blocks to model:

  • Block diagram equivalent of a program while or do-while loop.

  • An iterative algorithm that converges on a more accurate solution after multiple iterations.

When using simplified initialization mode, if you place a block that needs elapsed time (such as a Discrete-Time Integrator block) in a While Iterator Subsystem block, Simulink® displays an error.

If the output signal from a While Iterator Subsystem block is a function-call signal, Simulink displays an error when you simulate the model or update the diagram.

Ports

Input

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Placing an Inport block in a subsystem block adds an external input port to the block. The port label matches the name of the Inport block.

Use Inport blocks to get signals from the local environment.

Data Types: half | single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | fixed point | enumerated | bus

Placing a While Iterator block connected to an Input block in a Subsystem block adds this external input port to the block.

Data Types: half | single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | fixed point

Output

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Placing an Outport block in a subsystem block adds an output port from the block. The port label on the subsystem block is the name of the Outport block.

Use Outport blocks to send signals to the local environment.

Data Types: half | single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean | fixed point | enumerated | bus

Model Examples

Simulink Subsystem Semantics

Simulink Subsystem Semantics

This set of examples shows different types of Simulink® Subsystems and what semantics are used when simulating these Subsystems. Each example provides a description of the model and the subtleties governing how it will be executed.

Open Model
Parallel Channel Power Allocation

Parallel Channel Power Allocation

A potential use of the Find block. This block outputs a variable-size signal containing the indices of the nonzero values of the input.

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

limited[a]

Zero-Crossing Detection

no

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

Extended Capabilities

See Also

Blocks

Topics

Introduced before R2006a

Simulink Documentation

Support