db_0143: Usable block types in model hierarchy

Guideline Publication

Control Algorithm Modeling Guidelines - Using MATLAB^®, Simulink^®, and Stateflow^®

• Version 6.0

Sub ID Recommendations

• NA-MAAB — a

• JMAAB — a

MATLAB Versions

All

Rule

Sub ID a

Model levels shall use only the block types that are defined for the layer type. Clearly defined layer types restrict the number of blocks that can be used.

Block restrictions:

• (R2011a and earlier) Enable block cannot be used at the root level of the model.

• Action ports are not permitted at the root level of a model.

Layer restrictions:

• Data flow layers that are used for basic blocks only.

• Other than data flow layers, layers can include blocks that are used for structural subsystems and all other layers.

Blocks that can be used for all layers include:

• Inport

• Outport

• Mux

• Demux

• Bus Selector

• Bus Creator

• Selector

• Ground

• Terminator

• From

• Goto

• Merge

• Unit Delay

• Rate Transition

• Data Type Conversion

• Data Store Memory

• If

• Switch Case

• Function-Call Generator

• Function-Call Split

• Inport Shadow

Custom Parameter

Layer type

Block type

Rationale

Sub ID a:

• Readability is impaired when subsystems and basic blocks are used in the same layer.

Verification

Model Advisor check: Check for mixing basic blocks and subsystems (Simulink Check)

Last Changed

R2020a

Version History

Introduced in R2020a