Stateflow

Default Transitions

Default transitions specify which exclusive (OR) state is to be active when there is ambiguity between two or more exclusive (OR) states at the same level in the hierarchy.

For example, in the diagram on page 2-10, the default transition to StateA1 resolves the ambiguity that exists with regard to whether StateA1 or StateA2 should be active when State A becomes active. In this case, when StateA is active, by default StateA1 is also active.

In the following Lights subsystem, the default transition to the Lights.Off substate indicates that when the Lights superstate becomes active, the Off substate becomes active by default.

Note    History junctions override default transition paths in superstates with exclusive (OR) decomposition.

Note    In parallel (AND) states, a default transition must always be present to indicate which of its exclusive (OR) states is active when the parallel state becomes active.

Transitions

Events