Unit System Configuration

R2026b

Restrict units to specified allowed unit systems

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Unit System Configuration block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Simulink / Ports & Subsystems

Description

The Unit System Configuration block specifies allowed and disallowed unit systems for the component. It restricts units systems for a subsystem or top model and all its children, unless you override it with another Unit System Configuration block in a child.

This block supports normal, accelerator, and rapid accelerator modes and fast restart.

Parameters

Disallowed unit systems — Disallowed unit systems

SI | English | SI (extended) | CGS

Displays a list of the disallowed unit systems. By default, the Allow all unit systems check box is selected, and all unit systems are allowed.

To designate a unit system as disallowed, select it in the Allowed unit systems column and click << Disallow.

Dependencies

To enable changes to this parameter, you must first clear the Allow all unit systems check box.

Allowed unit systems — Allowed unit systems

SI | English | SI (extended) | CGS

Displays a list of the allowed unit systems. By default, the Allow all unit systems check box is selected, and all unit systems are allowed.

To designate a unit system as allowed, use the Allow >> and << Disallow buttons to move unit systems between the Disallowed unit systems and Allowed unit systems columns.

Dependencies

To enable changes to this parameter, you must first clear the Allow all unit systems check box.

Programmatic Use

Block Parameter: UnitSystems

Type: cell array of character vectors

Values: cell array of the following character vectors: 'SI' | 'English' | 'SI (extended)' | 'CGS'

Default: {'SI', 'English', 'SI (extended)', 'CGS'}

Allow all unit systems — Allow all unit systems

on (default) | off

When you select this check box, all unit systems are allowed. To restrict the allowed unit systems to only the ones specified in the Allowed unit systems column, clear this check box.

Dependencies

Selecting the Allow all unit systems check box disables the Disallowed unit systems and Allowed unit systems parameters.

Programmatic Use

Block Parameter: AllowAllUnitSystems

Type: character vector

Values: 'on' | 'off'

Default: 'on'

Block Characteristics

Data Types	Boolean | bus | double | enumerated | fixed point | integer | single
Direct Feedthrough	no
Multidimensional Signals	unknown
Variable-Size Signals	unknown
Zero-Crossing Detection	no

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"simulink/Ports & Subsystems/Unit System Configuration"

Example: add_block("simulink/Ports & Subsystems/Unit System Configuration","myModel/myBlock",MakeNameUnique="on")

Extended Capabilities

C/C++ Code Generation
Generate C and C++ code using Simulink® Coder™.

Fixed-Point Conversion
Design and simulate fixed-point systems using Fixed-Point Designer™.

Version History

Introduced in R2016a