To run the simulation you have to insert an EventController. The EventController is an important object within Plant Simulation as it is used for starting, stopping and resetting models as well as controlling the speed of the simulation.
Select
the EventController
in the Toolbox and insert
it in the top left corner of the Frame.
Instead, you can click the EventController icon on the toolbar of the Frame. This will result in Plant Simulation prompting to automatically insert an EventController.
