When you simulate a model related to time (for example, a transition with a time trigger), Cameo Simulation Toolkit will obtain simulation time from a simulation clock. The simulation time is the amount of time spent on simulating a model. Cameo Simulation Toolkit also uses the simulation time in a timestamp of a signal instance in the SimulationLog (see Simulation log), in a time series chart (see Time series chart), and on messages of a generated Sequence diagram. 

There are three types of simulation clocks in Cameo Simulation Toolkit:

• Built-in clock. This is the default simulation clock.

• Internal simulation clock. This clock is designed to precisely control the simulation time. Its implementation is based on UML run-to-completion semantics and internal completion events.
• Model-based clock. You can select the model-based clock by making the property as the time value tag definition of a Simulation Config. See Model-based Clock for further details on the model-based clock.

You can open the Simulation Clock dialog to see the internal simulation clock in real time by right-clicking within the Simulation Sessions pane and selecting Show Simulation Clock.

The Simulation Clock dialog with the Step button.

Related pages

• Built-in clock
• Internal simulation clock
• Model-based clock
• Understanding simulation sessions