Simulation Toolkit allows debugging the Parametric diagram through Breakpoints. It is especially helpful when working on projects with a large number of elements or parametric patterns that are applied recursively. Because the Parametric diagram usually run at the maximum speed (without delay) regardless of the Animation Speed settings (see also SimulationConfig), you must set Breakpoints to monitor values.
In the figure below, Simulation pauses at the margin breakpoint in the Parametric diagram in which you can debug the model. You can also find the sample model of parametric debugging on the Welcome screen by going to the Simulation sample group and selecting SpacecraftMassRollup.