DETECTION METHOD FOR MULTI-DROP WIRING FAILURE AND MULTI-DROP WIRING SYSTEM

摘要

PPROBLEM TO BE SOLVED: To easily know for everybody, a failure occurrence location in a multi-drop wiring in which a plurality of signal generators are connected. PSOLUTION: In a multi-drop wiring system connected in parallel with the first conductor 2 and the second conductor 4 and using a plurality of signal generators 11 to 15 outputting a direct current at a constant value, connection points of the second conductor 4 and the signal generators 11 to 15 are provided for each signal generators, and these connection points are connected with anomaly detector resistors 32 to 35 with different resistances in the constitution. A monitor device 6 calculates a difference between a direct current voltage measured between the terminal of the first conductor 2 and the terminal of the second conductor 4 and the direct current voltage between the terminals in normal time. The calculated difference is used as a key to search a data base showing correspondence of the difference data and the failure location, and the found failure location is indicated. PCOPYRIGHT: (C)2004,JPO