Check for avoiding algebraic loops between subsystems

R2026b

Check ID: mathworks.jmaab.jc_0653

Guideline: jc_0653: Delay block layout in feedback loops

Description

Use this check to identify feedback loops between subsystems, and verify the Delay block used to break the loop is placed at the hierarchical level that describes the feedback loop.

This check requires a Simulink® Check™ license.

Check Parameterization

This check does not include sub-checks because the MAB modeling guideline provides only one sub ID.

For reference, the MAB guideline sub ID(s) that are recommended for use by the NA-MAAB and JMAAB modeling standards organizations are:

  • NA-MAAB — a

  • JMAAB — a

Results and Recommended Actions

ConditionRecommended Action
Delay blocks used in feedback loops across subsystems are placed inside a subsystem, rather than at the hierarchical level that represents the feedback loop.Place delay blocks in feedback loops at the hierarchical level that describes the feedback loop.

Capabilities and Limitations

  • Runs on library models.

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

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

  • Allows exclusions of blocks and charts.

See Also