Send, Message Send

Create and send message

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  • Library:

  • Simulink / Messages & Events

    SimEvents

  • Send block

Description

The Send block reads the value of an input signal, and sends a message that carries this value. In message-based communication, a message is a discrete-item of interest that carry data of any type that Simulink supports. Send and Message Send blocks are identical blocks.

Ports

Input

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Input port to enable the block to send a message. For any input value that is greater than 0 send is enabled. For any value less than or equal to 0, the send is disabled.

Dependencies

To enable this port, select the box labeled Show enable port.

Data Types: double

This block accepts inputs of any type that Simulink® supports, including enumerated types and converts the input signal to a message. For more information, see Data Types Supported by Simulink.

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

Output

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The block outputs a message with constant priority 20.

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

Parameters

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Select this check box to display enable port.

Programmatic Use

Block Parameter: ShowEnablePort
Type: character vector
Values: 'on' | 'off'
Default: 'off'

Model Examples

Animate and Understand Sending and Receiving Messages

Animate and Understand Sending and Receiving Messages

Send, receive, and visualize messages. The example also shows how to use Simulation Data Inspector, Animation, and Storage Inspector to understand how messages flow in your model.

Use a Queue Block to Manage Messages

Use a Queue Block to Manage Messages

Use a Queue block to store and queue messages. The Queue block allows you to specify message storage capacity, overwriting policy, and sorting policy during message transitions.

Establish Message Send and Receive Interfaces Between Software Components

Establish Message Send and Receive Interfaces Between Software Components

Model message-based communication between software components that run in different applications. The example also shows how to prepare model components for C++ code generation.

Model a Message Receive Interface that Runs on Message Availability

Model a Message Receive Interface that Runs on Message Availability

Synchronize execution with data availability in message-based systems. We show how to model this behavior using events and actions. This example builds on another example, Establish Message Send and Receive Interfaces Between Software Components, where two software components communicate using messages.

Block Characteristics

Data Types

Boolean | bus | double | enumerated | fixed point | integer | single | string

Direct Feedthrough

no

Multidimensional Signals

yes

Variable-Size Signals

no

Zero-Crossing Detection

no

Extended Capabilities

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

See Also

(SimEvents)

Topics

Introduced in R2016a

Simulink Documentation

Support