| 摘要 |
<p>PURPOSE:To facilitate the expansion and modification of a system and to make a battery unnecessary by providing an external memory device and constituting such that a control program necessary for the action of a device is automatically read in according to the prescribed program. CONSTITUTION:When the power source of a numerical controller (NC) is turned on, a CPU1 turns on the power source switch 6 of a floppy disk device 4 according to the activating program of an initial program rotor 3. When the device 4 reads the control program in a RAM2 to confirm that this process is terminated, it reads a processing program in the RAM2. When such confirmation is made that the loading work of the processing program is terminated, the switch 6 of the device 4 is cut. Then the NC device activates the control program read in the RAM2 to terminate the program action of the rotor 3. With this constitution only the exchange of a memory device can expand and modify easily the system. Since the battery for memory backup is made unnecessary, the reliability of the overall device can be improved.</p> |
