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数据存储

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, seeData Store Basics.

To route signals across large models, consider usingGotoandFromblocks 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 Simulink block path
Simulink.SimulationData.Dataset Access logged simulation data or group simulation input data

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.

Related Information