Total number of instances allowed per top model
Number of references to this model that can occur in another model
Model Configuration Pane: Model Referencing
The Total number of instances allowed per top model configuration parameter determines how many references to this model can occur in another model.
Set Configuration Parameter for Referenced Model
In a model reference hierarchy, how you open the Configuration Parameters dialog box determines whether you edit the configuration parameter for the top model in the current model hierarchy or the current referenced model.
Top model in the current model hierarchy — In the Simulink® Toolstrip, on the Modeling tab, click Model Settings.
Current referenced model — In the Simulink Toolstrip, on the Modeling tab, click the Model Settings button arrow. Then, in the Referenced Model section, select Model Settings.
Alternatively, open the referenced model as a top model. Then, in the Simulink Toolstrip, on the Modeling tab, click Model Settings.
A model cannot reference this model. An error occurs if another model references this model.
A model hierarchy can reference this model at most once. An error occurs if more than one reference exists in a model hierarchy.
A model hierarchy can reference this model more than once, if it contains no constructs that preclude multiple references. An error occurs if this model cannot be referenced multiple times, even if only one reference exists. For model reuse requirements, see Model Reuse.
To use multiple instances of a referenced model in normal mode, use the
Multiplesetting. For details, see Simulate Multiple Referenced Model Instances in Normal Mode.
Setting Total number of instances allowed per top model to
Multiple for a model that is referenced only once can reduce
execution efficiency slightly. However, this setting does not affect data values that result
from simulation or from executing Simulink
Coder™ generated code. Specifying
Multiple when only one
model instance exists avoids having to change or rebuild the model when reusing the model:
In the same hierarchy
Multiple times in a different hierarchy
Introduced before R2006a