Main Content

Check usage of Logical Operator blocks

Check ID: mathworks.hism.hisl_0018

Identify usage of Logical Operator blocks that might impact safety.


This check inspects the usage of Logical Operator blocks.

Available with Simulink® Check™.

Results and Recommended Actions

ConditionRecommended Action
The model or subsystem contains a Logical Operator block that has inputs or outputs that are not Boolean inputs or outputs. The block might result in floating-point equality or inequality comparisons in the generated code.
  • Modify the Logical Operator block so that all inputs and outputs are Boolean. On the Block Parameters > Signal Attributes pane, consider selecting Require all inputs to have the same data type and setting Output data type to boolean.

  • In the Configuration Parameters dialog box, consider selecting the Implement logic signals as boolean data (vs. double).

Capabilities and Limitations

  • Does not run on library models.

  • Analyzes content of library linked blocks. By default, the input parameter Follow links is set to on.

  • Analyzes content in masked subsystems. By default, the input parameter Look under masks is set to all.

  • Allows exclusions of blocks and charts.

See Also