| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To easily find out the cause of a failure of an elevator having a control device composed of a relay sequence. <P>SOLUTION: The occurrence of the failure of the elevator causes a potential difference between operation contact points 3 at the occurrence of the failure. An input circuit 5 converts this potential difference into an electric signal and outputs it to a detecting circuit 6. The detecting circuit 6 inputs the electric signal from the input circuit 5 and outputs an H-level signal as a detection signal to a display device 7 and a disconnecting circuit 8. When the detection signal from the detecting circuit 6 is input, the disconnecting circuit 8 disconnects a detection voltage setting circuit 9 from the input circuit 5. When the H-level signal which is a detection signal from the detecting circuit 6 is input, the display device 7 is lighted, and lighting is maintained during the input of the H-level signal. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
