| 摘要 |
PURPOSE:To omit the restoration processing which is carried out by an operator by restoring the present position of an unmanned vehicle set before a power failure before the power failure is recovered and the vehicle operating program step number and automatically carrying on the drive of the vehicle in the state set before the power failure. CONSTITUTION:A counter value store part 51 and a step number store part 52 are provided in a power failure holding area. Then the value of an up-down counter 53 used for control of the present position of an automatically governed vehicle is stored in the part 51 every time the data are updated. Meanwhile the step number of a pointer 32 is stored in the area 52 every time the step is updated. When the power failure is recovered, the value of the part 51 is set at the counter 53 and the step of the pointer 32 is set at the value of the part 52. Thus a controller 19 can know the present position of the vehicle and the vehicle program to be carried out and therefore carries on the transfer work designated before the power failure. |
