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Establish message-based communication between Simulink® model components

Messages are used to model communication between Simulink components for the purpose of system integration. You can use messages to establish communication in a composition model whose components perform a defined set of functionalities with I/O boundaries.

Message-based communication between software components is necessary in control system architectures where centralized architectures are replaced by distributed architectures due to system complexity. A message is a useful modeling artifact that combines events with related data. Use message blocks to manage the production, consumption, and storage of messages.

To learn more about Simulink messages, see Simulink Messages Overview.


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SendCreate and send message
ReceiveReceive messages
Hit Crossing ProbeDetect crossing point
Queue, Entity QueueEnqueue messages and entities
Message MergeCombine message paths (Since R2021a)
Message Triggered SubsystemSubsystem whose execution is controlled by message input (Since R2022a)
Sequence ViewerDisplay messages, events, states, transitions, and functions between blocks during simulation


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Sequence ViewerVisualize messages, events, states, transitions, and functions (Since R2020b)


Understanding Simulink Messages

  • Simulink Messages Overview
    Overview of the message-based communication for distributed architectures, code generation, and middleware modeling.

Model Message Send and Receive Interfaces

Model Event-Driven Receive Interfaces

Message-Based Computation

Simulate Middleware Effects on a Distributed Architecture