If your design has been created and synthesized as a top-level design, then click the Functional Simulation icon on the Simulation button in the Foundation Project Manager to automatically invoke the simulator and load the netlist. The Functional Simulation icon is shown in the following figure.
For a description of how to select signals, choose stimulators, and run the simulation, refer to the online help tutorial by selecting Help 
Foundation Help Contents. Then, under Tools, click on Logic Simulator. Double click on the Getting Started Tutorial.
