Send

Create and send message

• 

Libraries:
Simulink / Messages & Events
SimEvents

Alternative Configurations of Send Block:
Message Send

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.

Examples

Animate and Understand Sending and Receiving Messages

Send, receive, visualize, and animate messages and display message data.

• Open Model

Use a Queue Block to Manage Messages

Use FIFO queue, LIFO queue, and priority queue to sort and store messages and define queue policies.

• Open Model

Establish Message Send and Receive Interfaces Between Software Components

Create message send and receive interfaces, and prepare components for C++ code generation.

• Open Model

Connect Message Receive Interface with Simulink Functions

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.

• Open Model

Ports

Input

Port_Enable — External enable signal

scalar

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

Port_1 — Input signal

scalar | vector | matrix

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

Port_1 — Output message

scalar | vector | matrix

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

Show enable port — Display the enable port

off (default) | on

Select this check box to display enable port. 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.

Programmatic Use

Block Parameter: ShowEnablePort

Type: character vector

Values: 'on' | 'off'

Default: 'off'

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

Alternative Configurations

Message Send — Create and send message

The Message Send block differs from the Send block in name only.

Libraries:
Simulink / Messages & Events
SimEvents

Extended Capabilities

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

Version History

Introduced in R2016a