| 摘要 |
PROBLEM TO BE SOLVED: To avoid a non-working state by always monitoring the states of power supply establishing signals and independent power supply establishing signals and determining an elevator operating method based on the signal information before abnormality by judging the power supply during such abnormality as simultaneously opening and closing circuits as abnormality in signal input. SOLUTION: Power 8 is supplied to a microcomputer board 1 comprising a CPU 2, sequence program, ROM 4 and RAM 5 for storing data for controlling the whole of an elevator system and an I/O board 3. When power failure occurs, commercial power supply is switched to an independent power supply plant 10 to operate elevator cages to reference floor for refuge in order according to the capacity of power supply. Power supply establishing signals 11 and independent power supply establishing signals 12 are input into the micro computer board 1 from the I/O board 3 to determine operating method in a micro computer and control the elevator system. Even if power supply signals are frequently cut off, if power is supplied, elevator cages are operated as much as possible, and such troubles as enclosing passengers in an elevator cage can be reduced and no-working time is shortened, and service is improved. |
