Whether motion is commanded or not.

        ``bool``

        Can't be set.

        Notes
        -----
        It is the value of the first bit of the 'TAS' command.

def motion_commanded(self):
        """ Whether motion is commanded or not.

        ``bool``

        Can't be set.

        Notes
        -----
        It is the value of the first bit of the 'TAS' command.

        """
        rsp = self.driver.send_command('TAS', immediate=True)
        if self.driver.command_error(rsp) or len(rsp[4]) != 1 \
                or rsp[4][0][0:4] != '*TAS':
            return False
        else:
            return (rsp[4][0][4] == '1')