Data Stores

R2026b

Define global values for multiple signals at different levels of a model

A large model can require individual signals to route to many separate blocks in different locations in the diagram. You can configure a data store to allow access to signal data from anywhere in a model, similar to a global variable in a computer program. However, as with global variables, data stores can reduce model transparency and make model verification more difficult. To decide whether to use a data store, see Data Store Basics.

To route signals across large models, consider using Goto and From blocks instead of data stores.

Blocks

	Data Store Memory	Define data store
	Data Store Read	Read data from data store
	Data Store Write	Write data to data store

Classes

`Simulink.SimulationData.DataStoreMemory`	Container for data store logging information
`Simulink.SimulationData.BlockPath`	Fully specified block path
`Simulink.SimulationData.Dataset`	Access logged simulation data or group simulation input data

Objects

Simulink.DataStore Specify instance-specific properties of data store (Since R2026b)

Model Settings

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Data Store Diagnostics

Detect read before write	Diagnostic action to take if model reads from data store before writing to that data store in current time step
Detect write after read	Diagnostic action to take if model writes to data store after reading from data store in current time step
Detect write after write	Diagnostic action to take if model writes to data store twice in current time step
Multitask data store	Diagnostic action to take when task reads from data store to which another task writes
Duplicate data store names	Diagnostic action to take if model contains multiple data stores with same name

Modeling Guidelines

Check Data Store Memory blocks for multitasking, strong typing, and shadowing issues

Check data store block sample times for modeling errors

Check for potential ordering issues involving data store access

Check if read/write diagnostics are enabled for data store blocks

Topics

Model Global Data by Creating Data Stores
Explicitly model a separate piece of global memory by creating a data store.
Log Data Stores
Configure a data store for logging so that you can view the data stored in a simulation run.
Data Store Basics
A data store is a repository to which you can write data, and from which you can read data, without having to connect an input or output signal directly to the data store.
Specify Signal Ranges
Specify the minimum and maximum value that a signal can attain during simulation. Fully specify your design and optimize data types and the generated code by specifying the minimum and maximum value that a signal can attain during simulation.
Use Simulink.DataStore Objects to Specify Data Store Using Model Explorer
Specify Simulink.DataStore using Model Explorer.

Related Information

Featured Examples

Share Data Among Multiple Instances of a Reusable Algorithm

Use a Data Store Memory block to share data among multiple instances of an algorithm in a model.

Open Model

Use Data Stores Across Multiple Models

Model showing how to define, use, and log global data stores to share global data among referenced models.

Open Model