@staticmethod
def change_scene_register(register_id):
    """Change the scene register id.

        :param    int    register_id:    Register id 0..9
        :return:  The PCK command (without address header) as text
        :rtype:   str
        """
    if register_id < 0 or register_id > 9:
        raise ValueError('Wrong register_id.')
    return 'SZW{:03d}'.format(register_id)
