| 摘要 |
<p>An electronic survey instrument which is controlled in accordance with a computer program to restore normally a display image and a count value immediately before a power cut-off time when a power source is cut off and then resumed. The instrument includes a main system for operating in accordance with a survey program, and plural subsystems for operating based on a control signal from the main system. The main system includes resume means for saving information into a memory immediately before a power-off time and restoring the information saved in the memory at the next power-on time; means for storing end information representing that information has been saved into a memory to cut normally a power source off; and means for canceling an information restoring process by the resume means at the next power-on time when the end information has not been stored in the memory means. <IMAGE></p> |
