Main Content


Create System Composer model

Since R2019a



model = systemcomposer.createModel(modelName,FileType=fileType) creates a System Composer™ model or subsystem with name modelName and returns the systemcomposer.arch.Model object.

model = systemcomposer.createModel(modelName,modelType,FileType=fileType) creates a System Composer model or subsystem with name modelName and type modelType and returns the systemcomposer.arch.Model object.


collapse all

Create a model and display its properties.

model = systemcomposer.createModel("model_name")
model = 

  model with properties:

                   Name: 'model_name'
           Architecture: [1×1 systemcomposer.arch.Architecture]
         SimulinkHandle: 2.0005
                  Views: [0×0 systemcomposer.view.ViewArchitecture]
               Profiles: [0×0 systemcomposer.profile.Profile]
    InterfaceDictionary: [1×1 systemcomposer.interface.Dictionary]

Input Arguments

collapse all

Name of new model or subsystem, specified as a character vector or string. This name must be a valid MATLAB® identifier.

Example: "model_name"

Data Types: char | string

Type of model or subsystem to create, specified as "Architecture" for an architecture, "SoftwareArchitecture" for a software architecture, or "AutosarArchitecture" for an AUTOSAR architecture.

Data Types: char | string

Type of file to create, specified as "Model" for an architecture model or "Subsystem" for an architecture subsystem.

Data Types: char | string

Output Arguments

collapse all

Architecture model, returned as a systemcomposer.arch.Model object.

More About

collapse all


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.


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

Perform operations on a model:

  • Extract the root-level architecture contained in the model.

  • Apply profiles.

  • Link 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 nontrivial, nearly independent, and 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, a 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:


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.

These are different types of ports:

  • 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.


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.


TermDefinitionApplicationMore Information
software architecture

A software architecture is a specialization of an architecture for software-based systems, including the description of software compositions, component functions, and their scheduling.

Use software architectures in System Composer to author software architecture models composed of software components, ports, and interfaces. Design your software architecture model, define the execution order of your component functions, simulate your design in the architecture level, and generate code.

software component

A software component is a specialization of a component for software entities, including its functions (entry points) and interfaces.

Implement a Simulink® export-function, rate-based, or JMAAB model as a software component, simulate the software architecture model, and generate code.

software composition

A software composition is a diagram of software components and connectors that represents a composite software entity, such as a module or application.

Encapsulate functionality by aggregating or nesting multiple software components or compositions.

Modeling Software Architecture of Throttle Position Control System

A function is an entry point that can be defined in a software component.

You can apply stereotypes to functions in software architectures, edit sample times, and specify the function period using the Functions Editor.

Author and Extend Functions for Software Architectures
service interface

A service interface defines the functional interface between client and server components. Each service interface consists of one or more function elements.

Once you have defined a service interface in the Interface Editor, you can assign it to client and server ports using the Property Inspector. You can also use the Property Inspector to assign stereotypes to service interfaces.

function element

A function element describes the attributes of a function in a client-server interface.

Edit the function prototype on a function element to change the number and names of inputs and outputs of the function. Edit function element properties as you would edit other interface element properties. Function argument types can include built-in types as well as bus objects. You can specify function elements to support:

  • Synchronous execution — When the client calls the server, the function runs immediately and returns the output arguments to the client.

  • Asynchronous execution — When the client makes a request to call the server, the function is executed asynchronously based on the priority order defined in the Functions Editor and Schedule Editor and returns the output arguments to the client.

function argument

A function argument describes the attributes of an input or output argument in a function element.

You can set the properties of a function argument in the Interface Editor just as you would any value type: Type, Dimensions, Units, Complexity, Minimum, Maximum, and Description.

class diagram

A class diagram is a graphical representation of a static structural model that displays unique architecture types of the software components optionally with software methods and properties.

Class diagrams capture one instance of each referenced model and show relationships between them. Any component diagram view can be optionally represented as a class diagram for a software architecture model.

Class Diagram View of Software Architectures

Version History

Introduced in R2019a

expand all