Minimize occurrences of algebraic loops by selecting the Minimize algebraic loop occurrences parameter on the Model Reference pane. The setting of this option affects only generation of code from the model. For more information about direct feed through, see Algebraic Loop Concepts (Simulink).
Use the Integer rounding mode parameter on your model's blocks to simulate the rounding behavior of the C compiler that you intend to use to compile code generated from the model. This setting appears on the Signal Attributes pane of the parameter dialog boxes of blocks that can perform signed integer arithmetic, such as the Product and n-D Lookup Table blocks.
For most blocks, the value of Integer rounding mode completely defines rounding behavior. For blocks that support fixed-point data and the Simplest rounding mode, the value of Signed integer division rounds to also affects rounding. For details, see Rounding (Fixed-Point Designer).
When models contain Model blocks, models that they reference must be configured to use identical hardware settings. For information on the Model Referencing pane options, see Model Configuration Parameters: Model Referencing (Simulink) and Set Configuration Parameters for Model Hierarchies (Simulink).
There are some configuration parameter setting limitations for code generation. See Code Generation Model Referencing Limitations (Simulink Coder).