| 摘要 |
PURPOSE:To prevent the frozen state of an abnormal state due to the function stop of a safety unit by invalidating the input of an operation signal from an operation switch for the prescribed time from when a motor current value exceeds a managing reference value. CONSTITUTION:When the closing state of a window 12 is in a safe function operating range and a motor load current value rises to exceed a managing reference value (b), a motor current sense circuit 7 notifies this state to a CPU8. The CPU8 starts counting the time from when entering this state by a counter 15 in an MPU4, judges the rising mode of a motor load current for the counting time, and if the rising degree of the motor load current is slow, it is regarded as the variation in the natural conditions, and not particularly specified. On the other hand, when entering a motor malfunction and the CPU8 detects the state so that the rising degree is abrupt, it controls the input of the operation signal (1) as T time invalid. When the motor load current arrives at the motor malfunction detected value, the CPU8 immediately starts the motor. |
