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Find if component reference model is protected

Since R2021b



flag = isProtected(compObj) returns whether or not the referenced model on the component is protected. A protected model is saved with an SLXP extension.


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Find whether or not the referenced model on the component is protected.

Create a new System Composer™ model and add a new component.

model = systemcomposer.createModel("archModel");
rootArch = get(model,"Architecture");
newComponent = addComponent(rootArch,"newComponent");

Create new Simulink® reference model and save.

newRef = new_system("newReference","Model");

Protect the Simulink model reference.


Link the Simulink model to the component newComponent.


Verify that the reference model linked to the component is protected.

flag = isProtected(newComponent)
flag =



Input Arguments

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Output Arguments

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Whether referenced model on component is protected, returned as a logical.

Data Types: logical

More About

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TermDefinitionApplicationMore Information

A System Composer architecture represents a system of components and how they interface with each other structurally and behaviorally.

Different types of architectures describe different aspects of systems. You can use views to visualize a subset of components in an architecture. You can define parameters on the architecture level using the Parameter Editor.


The root is at the top of an architecture hierarchy. A root architecture has a boundary defined by its architecture ports surrounding the system of interest.

The root architecture has a system boundary surrounding your architecture model. You can add architecture ports that define interfaces across the boundary.

Compose Architectures Visually


A System Composer model is the file that contains architectural information, such as components, ports, connectors, interfaces, and behaviors.

Perform operations on a model:

  • Extract root-level architecture.

  • Apply profiles.

  • Attach interface data dictionaries.

  • Generate instances from model architecture.

A System Composer model is stored as an SLX file.

Create Architecture Model with Interfaces and Requirement Links

A component is a replaceable part of a system that fulfills a clear function in the context of an architecture. A component defines an architectural element, such as a function, another system, hardware, software, or other conceptual entity. A component can also be a subsystem or subfunction.

Represented as a block, a component is a part of an architecture model that can be separated into reusable artifacts. Transfer information between components with:

Compose Architectures Visually


A port is a node on a component or architecture that represents a point of interaction with its environment. A port permits the flow of information to and from other components or systems.

  • Component ports are interaction points on the component to other components.

  • Architecture ports are ports on the boundary of the system, whether the boundary is within a component or the overall architecture model. The root architecture has a boundary defined by its ports.

Compose Architectures Visually


Connectors are lines that provide connections between ports. Connectors describe how information flows between components or architectures.

A connector allows two components to interact without defining the nature of the interaction. Set an interface on a port to define how the components interact.

Compose Architectures Visually

TermDefinitionApplicationMore Information
reference component

A reference component is a component whose definition is a separate architecture model, Simulink behavior model, or Simulink subsystem behavior. A reference component represents a logical hierarchy of other compositions.

You can synchronize and reuse reference components as Reference Component blocks. There are three types of reference components:

  • Model references are Simulink models.

  • Subsystem references are Simulink subsystems.

  • Architecture references are System Composer architecture models or subsystems.


A parameter is an instance-specific value of a value type.

Parameters are available for inlined architectures and components. Parameters are also available for components linked to model, subsystem, or architecture references that specify model arguments. You can specify independent values for a parameter on each component.

subsystem component

A subsystem component is a Simulink subsystem that is part of the parent System Composer architecture model.

Add Simulink subsystem behavior to a component to author a subsystem component in System Composer. You cannot synchronize and reuse subsystem components as Reference Component blocks because the component is part of the parent model.

state chart

A state chart diagram demonstrates the state-dependent behavior of a component throughout its state lifecycle and the events that can trigger a transition between states.

Add Stateflow® chart behavior to describe a component using state machines. You cannot synchronize and reuse Stateflow chart behaviors as Reference Component blocks because the component is part of the parent model.

Version History

Introduced in R2021b