ChangeEvent

When the computer is in StandBy, y.sigsp [ERROR] is set to 8, and when the computer is On, y.sigsp [ERROR] is set to 3.

Source

The transition from On to StandBy has a ChangeEvent with an expression indicating that the transition is triggered when u.sigsp [ERROR] is equal to 0.

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The transition from StandBy to On has a ChangeEvent with an expression indicating that the transition is triggered when u.sigsp [ERROR] is equal to 1 (this is a signal as in signal flow simulation, not as in SysML).

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Figure 29: State machine in SysML

Gallery

Tutorial

TRAIL: SysPhS-1.1 specification body figures in MagicDraw/Cameo SysML vs Modelica [using Wolfram SystemsModeler]

Section

Slide kind

SysML Block Definition Diagram (BDD)

SysML StateMachine Diagram

Transitions

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Gallery

Tutorial

TRAIL: Webel's ultimate guide to Systems Modeling Language (v1) with MagicDraw/Cameo

Section

01:03: UML Behavior: StateMachines quick start

Slide kind

UML StateMachine Diagram

A ChangeEvent models a change in the system configuration that makes a condition true.

Source

Unified Modeling Language 2.5.1

An Event is the specification of some occurrence that may potentially trigger effects by an object.

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Unified Modeling Language 2.5.1

Figure 9-3: Stereotypes for Property Value Change Events

Gallery

Tutorial

TRAIL: The SysML-1.6 Hybrid SUV sample and specification diagrams in MagicDraw/Cameo (with annotations) [UNDERGOING UPDATE to SysML1.7]

Section

Section: SysML-1.6 specification diagrams: 09 Ports and Flows

Slide kind

UML Profile Diagram

If the triggers of an AcceptEventAction are all for ChangeEvents and/or CallEvents, then the AcceptEventAction has no result OutputPins (unless the AcceptEventAction is an AcceptCallAction ...)

Source

Unified Modeling Language 2.5.1

Cameo Simulation Toolkit 19SP3 SUPPORTS ChangeEvent

fUML-1.4 EXCLUDES ChangeEvent

Screencast: Mini tutorial: UML/SysML: Cameo Simulation Toolkit: StateMachine with doActivity and a Transition with a ChangeEvent trigger

Keywords

Video style

A very simple demonstration of a StateMachine with a doActivity and a Transition that uses a trigger with a ChangeEvent for checking a value. Uses SysML but the same applies to UML.

Uses Magic Model Analyst^® (Cameo Simulation Toolkit^®) for MagicDraw SysML and Cameo System Modeler Enterprise Edition.

© Copyright 2020 Darren R C Kelly (Webel IT Australia). All rights reserved.

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