Main Content

Check safety-related diagnostic settings for type conversions

Check ID: mathworks.hism.hisl_0309

Check model configuration for diagnostic settings that apply to type conversions and that can impact safety.


This check verifies that model diagnostic configuration parameters pertaining to type conversions are set optimally for generating code for a safety-related application.

Available with Simulink® Check™.

Results and Recommended Actions

ConditionRecommended Action
The diagnostic that detects Data Type Conversion blocks when the type conversion is set to none. The Simulink software might remove unnecessary Data Type Conversion blocks from generated code, which might result in requirements without corresponding code. The removal of these blocks needs to be identified so model developers can explicitly remove the unnecessary blocks. Set the Unnecessary type conversions Configuration Parameter orUnnecessaryDatatypeConvMsg parameter to warning.
The diagnostic that detects vector-to-matrix or matrix-to-vector conversions at block inputs is set to none or warning. When the Simulink software automatically converts between vector and matrix dimensions, unintended operations or unpredictable behavior can occur.Set the Vector/matrix block input conversion Configuration Parameter or VectorMatrixConversionMsg parameter to error
The diagnostic that detects when a 32-bit integer value is converted to a floating-point value is set to none. This type of conversion can result in a loss of precision due to truncation of the least significant bits for large integer values. Set the 32-bit integer to single precision float conversion Configuration Parameter or Int32ToFloatConvMsg parameter to warning.

Action Results

Clicking Modify Settings configures model diagnostic settings that apply to type conversions and that can impact safety.

Capabilities and Limitations

  • Does not run on library models.

  • Does not allow exclusions of blocks or charts.

See Also