Main Content

Check usage of fixed-point data type with non-zero bias

Check ID: mathworks.jmaab.jc_0643

Guideline: jc_0643: Fixed-point setting


Identifies blocks with fixed-point output signal data type and non-zero bias.

For blocks that have a fixed-point data type for their output signals, check that block parameter Bias is set to 0.

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 — No recommendations

  • JMAAB — a

Results and Recommended Actions

ConditionRecommended Action

In the Data Type Assistant, Mode is set to Fixed Point but the value for Bias is not 0.

Change the block parameter Bias to 0.

Capabilities and Limitations

  • Does not run on library models.

  • Supports exclusions.

  • 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 graphical.