About the use of Data Store Memory

I need to exchange data using a large number of "Data Store Memory".(More than 100)

So I created a lot of "Data Store Memory" at the top of the model, but it would look ugly and messy.

If I put all the "Data Store Memory" into the subsystem, it will not be accessible everywhere in the model.

Is there a way to put these "Data Store Memory" into a subsystem and still be able to access them from anywhere?

Or is there any other way to package these "Data Store Memory"?

Thanks!

Answer 1

[Fangjun Jiang]

From https://www.mathworks.com/help/releases/R2022b/simulink/slref/datastorememory.html

"You can use Simulink.Signal objects in addition to, or instead of, Data Store Memory blocks to define data stores. A data store defined in the base workspace with a signal object is a global data store. Global data stores are accessible to every model, including all referenced models. See Data Stores for more information."

So, instead of adding a DataStoreMemory block and label it "A", you can just do this in Command Window, and then use DataStoreRead and DataStoreWrite block anywhere in the model.

A=Simulink.Signal;

[Ming-Yuan Jeng]

Using Simulink.Signal can achieve the function of signal exchange.

But Data Store Memory block can easily manage the location of DataStoreRead block and DataStoreWrite block .

Is it possible to manage the location of DataStoreRead block and DataStoreWrite block if using Simulink.Signal?

Thanks!

[Fangjun Jiang]

You mean the scope of the data store memory? No. Data store memory defined by Simulink.Signal object is global. Every model and every where can access it. But if you was planning to put 100 data store memory blocks at the top of the model, then it means everywhere in the model needs to access it. This is the closest thing you can do to achieve it.

Every Read/Write block provides you with the links of the corresponding Write/Read blocks.

[Ming-Yuan Jeng]

No, I don't mean the scope of the data store memory. I mean Data Store Memmory block can show all corresponding Data Store Read/Write block links, so I can easily find all links.If I use Simulink.Signal, there is no such function.

Data Store Write block can only show all corresponding Data Store Read block links.

Data Store Read block can only show all corresponding Data Store Write block links.

[Fangjun Jiang]

That is true. There is no direct way. A few ways to help find those info:

1. Model Data Editor, Data Stores tab, sort by name
2. Ctrl+F in the model
3. find_system() in script
4. If tansfer the objects to a SLDD and link the SLDD to the model, then in the SLDD, you can select the object and right click, select "find where used"