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 blockData Store MemoryDefine data store
Data Store Read blockData Store ReadRead data from data store
Data Store Write blockData Store WriteWrite data to data store

Classes

Simulink.SimulationData.DataStoreMemoryContainer for data store logging information
Simulink.SimulationData.BlockPathFully specified block path
Simulink.SimulationData.DatasetAccess logged simulation data or group simulation input data

Objects

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

Model Settings

expand all

Detect read before writeDiagnostic action to take if model reads from data store before writing to that data store in current time step
Detect write after readDiagnostic action to take if model writes to data store after reading from data store in current time step
Detect write after writeDiagnostic action to take if model writes to data store twice in current time step
Multitask data storeDiagnostic action to take when task reads from data store to which another task writes
Duplicate data store namesDiagnostic 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.

  • Create Simulink.DataStore Objects in Model Explorer

    Specify Simulink.DataStore using Model Explorer.

Related Information

Featured Examples

Share Data Among Multiple Instances of a Reusable Algorithm

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.

Use Data Stores Across Multiple Models

Use Data Stores Across Multiple Models

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