How do I make the model skip cycles where nothing can happen?

Models that are entirely internal (i.e., they are not reactive to the external world), can use the internal event queue to determine when it can possibly fire again. To enable this, set the model's EnableUnusedCycleSkipping parameter to true.

Be warned, though - if the model is connected to another system for its perceptual world, the model will skip cycles, making the detection time wonky.