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Create triggers to activate other systems

Trigger actions within your Stateflow® chart or other Simulink® subsystems by using events. Trigger external actions by sending events to other charts in your Simulink model. For more information on sending events to the Schedule Editor to schedule the execution of aperiodic partitions, see Events in Schedule Editor (Simulink).


Sequence ViewerDisplay messages, events, states, transitions, and functions between blocks during simulation

Stateflow Syntax

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Event Generation

changeGenerate implicit event when data changes value
enterGenerate implicit event when state becomes active
exitGenerate implicit event when state becomes inactive
sendBroadcast message or event

Event Based Temporal Logic

afterExecute chart after event broadcast or specified time
atExecute chart at event broadcast or specified time
beforeExecute chart before event broadcast or specified time
countChart executions during which condition is valid
everyExecute chart at regular intervals
temporalCountNumber of events, chart executions, or time since state became active


Synchronize Model Components by Broadcasting Events

Use events to communicate with Simulink and MATLAB®.

Manage Symbols in the Stateflow Editor

Add, delete, and trace nongraphical objects.

Set Properties for an Event

Specify event properties by using the Property Inspector or the Model Explorer.

Activate a Stateflow Chart by Sending Input Events

Broadcast edge triggers and function calls as input events.

Control States in Charts Enabled by Function-Call Input Events

Set the behavior of states when a function-call input event reenables a chart.

Activate a Simulink Block by Sending Output Events

Broadcast edge triggers and function calls as output events.

Control Function-Call Subsystems by Using bind Actions

Bind a function-call output event to the activity of a state.

Broadcast Local Events to Synchronize Parallel States

Communicate between parallel (AND) states by making directed event broadcasts.

Control Chart Behavior by Using Implicit Events

Trigger chart actions by changes in data values and state activity.

Use the Sequence Viewer to Visualize Messages, Events, and Entities

View the interchange of messages, events, and functions through the Sequence Viewer block.

Related Information

Featured Examples