Controlling Simulation (ModelSim)
Since Twin Builder controls the simulation, all simulation parameters used for the co-simulation (such as the simulation end time) are determined by Twin Builder’s simulation parameters dialog box.
During simulation, you can pause or stop the simulation from Twin Builder. You may also continue the simulation at the end of a successful simulation run. To restart the simulation, start the simulation again. It is not required to follow the setup procedure if restarting a simulation for the currently setup schematic.