| 摘要 |
PROBLEM TO BE SOLVED: To provide an on/off method of an electric switch with high safety capable of preventing trouble such as a clipping or the like by being early detected even if there is trouble in a sensor or the like. SOLUTION: When an on-switch is turned ON (S1), a moving distance from the present position to a fully shut position is obtained from the difference between the present pulse count value and a count value 0 in the fully shut position, a timer corresponding to the calculated pulse count value is set (S2), and a motor is driven in the ON direction only by a setting time of the timer (S3). At the same time, a microcomputer 3 executes a pulse count of an output signal for a pulse generation means 2 (S4), and when the pulse count value becomes 0 in the fully shut position (S5), the motor stops (S7). When the timer's time is over (S6) before the pulse count value reaches 0 (fully shut position), the driving of the motor also stops (S7). |
