def getSchedulesBuffer(self, period_group):
empty_return = SerialBlock()<EOL>if period_group == ReadSchedules.Schedules_1_To_4:<EOL><INDENT>return self.m_schd_1_to_4<EOL><DEDENT>elif period_group == ReadSchedules.Schedules_5_To_6:<EOL><INDENT>return self.m_schd_5_to_6<EOL><DEDENT>else:<EOL><INDENT>return empty_return<EOL><DEDENT>
Return the requested tariff schedule :class:`~ekmmeters.SerialBlock` for meter.

        Args:
            period_group (int):  A :class:`~ekmmeters.ReadSchedules` value.

        Returns:
            SerialBlock: The requested tariff schedules for meter.