| 摘要 |
PURPOSE:To improve working efficiency and to reduce mistakes by preserving pre-renewal data after taking it out of an auxiliary storage device when a save switch is on and stocking the preserved data in the original storage place when the save switch is off. CONSTITUTION:A data recovery device 7 preserves pre-renewal data after taking it out of a device 3 together with the address when a save switch 8 is on at the renewal of data stocked in a support storage device 3. An operator inputs after-renewal data from a key board 2 by turning on a switch 8 when the operator intended to renew data. At this time, pre-renewal data are preserved in a device 7. After the input of after-renewal data, an operator carries out an action test after the operator makes the switch 8 off. For example, when a start switch of an air conditioner 5 is pressed, a system control part 4 controls the start of the air conditioner 5 referring to the data of the device 3. If NO, it displays that the data recovery is carried out because of an error is produced in a display 1 after a recovery switch 9 is on. |
