| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a servo control system capable of transmitting an appropriate speed command to a motor promptly in the case of power failure. <P>SOLUTION: This servo control system is provided with a voltage detector 17 which detects that the voltage of a main power supply is at least a predetermined value, generates a power failure detection signal, and detects that the voltage of the main power supply is restored and generates a power failure return signal. A higher-order controller 50 includes a deceleration command means which transmits a reference deceleration command to a servo controller 10 by a power failure detection signal, and an acceleration command means which transmits an acceleration command signal to a motor 30 by a power failure reset signal. The servo controller 10 includes a control unit 19 for power failure which generates a speed command during rotating the motor 30 for power failure for keeping the speed of the motor 30 constant or decelerating it on the basis of a power failure detection signal, and a comparison command device 21 which compares the speed command for power failure with the reference deceleration command and, if the speed command for power failure is larger, transmits an acceleration command to the motor 30. <P>COPYRIGHT: (C)2004,JPO |
