You can load data from a workspace and apply it to a root-level:
These blocks import data from the workspace based on the value of the Configuration Parameters > Data Import/Export > Input parameter.
Tip To import many signals to root-level input ports, consider using the Root Inport Mapping tool. For more information, see Map Root Inport Signal Data.
Use the Configuration Parameters > Data Import/Export > Input parameter to load data from a workspace and apply it to the root-level input ports of a model during a simulation run.
Note: The use of the Input box is independent of the setting of the Format list on the Data Import/Export pane.
Simulink resolves symbols used in the external input specification
as described in Symbol Resolution. See the documentation of the
sim command for some data import capabilities
that are available only for programmatic simulation.