EP 3 800 007 A1 FIG. 3A POSITION STORING PROCESS DISPLAY STANDBY POSITION SETTING INSTRUCTION PERFORM PROCESS OF STORING STANDBY POSITION DISPLAY SETTING INSTRUCTION FROM STANDBY POSITION S3 TO FIRST INSTALLATION POSITION 10A PERFORM PROCESS OF SA STORING PASSAGE POSITION ON FIRST ROUTE PERFORM PROCESS OF S5 STORING FIRST INSTALLATION POSITION 10A S1 S2 DISPLAY SETTING INSTRUCTION FROM FIRST INSTALLATION POSITION 10A S6 TO SECOND INSTALLATION POSITION 10B PERFORM PROCESS OF S7 STORING PASSAGE POSITION ON SECOND ROUTE 21