resetImpl(obj) defines the state reset equations for the System object™. Typically you reset the states to a set of initial values. This is useful for initialization at the start of simulation.
resetImpl is called by the reset method. It is also called by the setup method, after the setupImpl method.
Note: You must set Access = protected for this method.
You cannot modify any tunable properties in this method if its System object will be used in the Simulink® MATLAB System block.