GROUND SHORTING PORTION DETECTING DEVICE, GROUND SHORTING PORTION DETECTING METHOD, AND GROUND SHORTING PORTION DETECTING PROGRAM

摘要

PROBLEM TO BE SOLVED: To identify a location where a ground short occurs with a simple configuration.SOLUTION: A CPU 1 and a plurality of slave devices 2 to 5 are connected to each other. Cutoff SWs 6 to 9 are respectively inserted and connected between the slave devices 2 to 5 and the CPU 1. Then, on-off control is performed on each of the cutoff SWs 6 to 9 with a logic determined on the basis of the presence or absence of occurrence of a ground short of the slave devices 2 to 5 at the preceding stage. As a result, when the CPU 1 merely outputs a SW control signal for the cutoff SW 6 of the first stage, the on-off control of the cutoff switches 7 to 9 at the subsequent stage is performed on the basis of the presence or absence of occurrence of a ground short. The on-off state of each of the cutoff SWs 6 to 9 and the slave devices 2 to 5 capable of normally performing communication change according to the occurrence place of the ground short. Therefore, when the on-off state of each of the cutoff SWs 6 to 9 and the slave devices 2 to 5 capable of normally performing communication are detected, it is possible to specify the occurrence place of the ground short.SELECTED DRAWING: Figure 1