Hi
From a rough translation, I understand that you want to create a protected model which allows the end user to edit the parameters through code.
You can create a protected model with tunable parameters for the end user. These parameters can be edited programmatically as well.
You can refer to the following MATLAB Answer which refers to a full tutorial for creating a Protected Model with Mask and tunable model arguments.
You can also refer to the following documentation to set block parameter values programmatically.
Hope this helps!
