| 摘要 |
PROBLEM TO BE SOLVED: To easily specify an abnormal point even in the case when electric source voltage of an elevator is lowered due to abnormality on the side of an outside apparatus, stop a cage at the nearest stage, and prevent breakage of a common electric source. SOLUTION: When voltage of a common electric source 2 is lowered to a first specified value, a cage is stopped at the nearest stage after cutting-off circuits 14, 15, 18 cut off a cage call registration circuit 19, a platform call registration circuit 20 and a door position detection circuit 23 from the common electric source 2 in accordance with electric source cut-off signals 10a, 10b, 10e. Additionally, when the voltage is lowered to a second specified value, the cage is suddenly stopped and made impossible to restart by cutting off a cage position detection circuit 21 and a motor electric current detection circuit 22 in the same way. Additionally, when it is lowered to a third specified value, a microcomputer 12 is reset. |
