code: def pass_control_back(self, primary, secondary):
          
          if secondary is None:
              self._write(('*PCB', Integer(min=0, max=30)), primary)
          else:
              self._write(
                  ('*PCB', [Integer(min=0, max=30), Integer(min=0, max=30)]),
                  primary,
                  secondary
              )
docs: The address to which the controll is to be passed back.
  
          Tells a potential controller device the address to which the control is
          to be passed back.
  
          :param primary: An integer in the range 0 to 30 representing the
              primary address of the controller sending the command.
          :param secondary: An integer in the range of 0 to 30 representing the
              secondary address of the controller sending the command. If it is
              missing, it indicates that the controller sending this command does
              not have extended addressing.