Persistent Variable Write

R2026b

Write persistent variable value to target computer

Since R2022a

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Persistent Variable Write block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Simulink Real-Time / Target Management

Description

The Persistent Variable Write block writes a value to the selected persistent variable when the real-time application starts and stops. The variable value persists when the Speedgoat^® target computer is shut down.

Use the getPersistentVariables function and setPersistentVariables function to access the persistent variable values on the target computer.

Examples

Apply Persistent Variables in Real-Time Applications

Apply Simulink Real-Time persistent variables to preserve variable values when the real-time application stops or the target computer is powered off.

• Open Script

Ports

Input

Data — Persistent variable input data

variable data

The data type of the Persistent Variable Write block input port is inherited from its input signal. The signal can be any dimension.

The block can take a complex number. The complexity of the Persistent Variable Write block input port is inherited from its input signal.

Data Types: single | double | int8 | int16 | int32 | int64 | uint8 | uint16 | uint32 | uint64 | Boolean

Parameters

Variable name — Name of persistent variable

Variable1 (default) | character vector | string

The Variable name parameter provides the name of the persistent variable. Use this name to access the variable in the structure of variable values retrieved from the target computer by using the getPersistentVariables function.

Programmatic Use

Block Parameter: varName

Programmatic Use: Add Block

To add the block programmatically, use the add_block function with one of these library block paths as the source.

"slrealtimetgmanagement/Persistent Variable Write"

Example: add_block("slrealtimetgmanagement/Persistent Variable Write","myModel/myBlock",MakeNameUnique="on")

Extended Capabilities

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

Version History

Introduced in R2022a