docs: 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')