db_0132: Transitions in flow charts

Guideline Publication

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

• Version 6.0

Sub ID Recommendations

• NA-MAAB — a, b

• JMAAB — a, b

MATLAB Versions

All

Rule

Sub ID a

Transition actions shall not be used in flow charts.

Custom Parameter

Not Applicable

Example — Correct

Example — Incorrect

Transition actions are used.

Sub ID b

In a flow chart, the condition shall be positioned on a horizontal transition line and the condition action shall be positioned on a vertical transition line.

Exception

Diagonal transition lines in loop constructs.

Custom Parameter

Not Applicable

Example — Correct

The condition is positioned on a horizontal transition line and the condition action is on a vertical transition line.

Example — Incorrect

The condition is positioned on a vertical transition line and the condition action is on a horizontal transition line.

Rationale

Sub ID a:

• The transition action in a flow chart is not executed.

Sub ID b:

• Consistent positioning of conditions and condition actions improves readability.

Verification

Model Advisor check: Check transitions in Stateflow Flow charts (Simulink Check)

Last Changed

R2020a