| 摘要 |
PURPOSE:To properly cope with an abnormal condition by fetching speed information of an electric motor from a speed detecting means and various information from an arithmetic processing circuit to a supervision exclusive use arithmetic processing circuit, supervising speed abnormality of an elevator door due to misoperation of the arithmetic processing circuit, and performing a predetermined abnormality process. CONSTITUTION:An inverter 20 is controlled by fetching speed information from a speed detecting means, which detects a speed of an electric motor for opening/ closing an elevator door, to an inverter controlling arithmetic processing circuit 40. On the other hand, speed abnormality of the elevator door, due to misoperation of the arithmetic processing circuit 40, is supervised to perform a predetermined abnormality process by fetching the speed information from the speed detecting means and various information from the arithmetic processing circuit 40 to a supervision exclusive use arithmetic processing circuit 62 separate from the arithmetic processing circuit 40. In this way, coping can be properly performed relating to an abnormal condition by enabling a device to prevent misdetection by the arithmetic processing circuit 40. |
