Check usage of Relational Operator blocks

mathworks.hism.hisl_0017

Dependencies: Simulink^® Check™

Usage: High-Integrity System Modeling

Guideline: hisl_0017: Usage of blocks that compute relational operators (2)

Description

Use this check to inspect the usage of blocks that compute relational operators, including Relational Operator, Compare To Constant, Compare To Zero and, Detect Change blocks.

Check Parameters

Use the Model Advisor Configuration Editor to define the scope of the analysis by specifying the input parameters.

Parameter Description

Parameter	Description
Follow links	Specify whether to include content of library-linked blocks in the analysis. `on` (default) \| `off`
Look under masks	Specify whether to include masked model elements in the analysis. `all` (default) \| `none` \| `graphical` \| `functional` `all` — Check analysis includes all masked model elements. `none` — Check analysis excludes masked model elements. `graphical` — Check analysis includes only the graphical masked model elements. `functional` — Check analysis includes only the functional masked model elements.

Follow links

Specify whether to include content of library-linked blocks in the analysis.

on (default) | off

Look under masks

Specify whether to include masked model elements in the analysis.

all (default) | none | graphical | functional

all — Check analysis includes all masked model elements.
none — Check analysis excludes masked model elements.
graphical — Check analysis includes only the graphical masked model elements.
functional — Check analysis includes only the functional masked model elements.

Recommended Actions and Results

Review the violations that are flagged by the check and the recommended action for fixing the issue. After applying the changes, save the model and rerun the check analysis.

Modeling Condition	Recommended Action
The model or subsystem contains a block computing a relational operator that is operating on different data types. This condition can lead to unpredictable results in the generated code.	For the identified blocks, use common data types as inputs. You can use Data Type Conversion blocks to change input data types.
The model or subsystem contains a block computing a relational operator that does not have Boolean output. This condition can lead to unpredictable results in the generated code.	For the specified blocks, in the Block Parameters dialog box, on the Signal Attributes tab, set Output data type to `boolean`.

Capabilities and Limitations

Does not run on library models
Allows exclusions of blocks and charts
Analyzes only active variant choices
Performs model compilation

Version History

Introduced in R2020a