def set_plc_datetime(self, dt):
        """
        Set date and time in PLC

        :param dt: date and time as datetime
        """
        type_ = c_int32
        buffer = (type_ * 9)()
        buffer[0] = dt.second
        buffer[1] = dt.minute
        buffer[2] = dt.hour
        buffer[3] = dt.day
        buffer[4] = dt.month - 1
        buffer[5] = dt.year - 1900

        return self.library.Cli_SetPlcDateTime(self.pointer, byref(buffer))