| 摘要 |
PURPOSE:To search a faulty place exactly, by executing a logical protection processing by a fault signal from a fault detector at first, and cutting off the electric power source after a constant time has elapsed, in a fault control device. CONSTITUTION:In case such a fault as cuts off of an electric power source has been detected by fault detectors a1-an, its detection signal operates a relay of a fault signal driving circuit 10, sends a fault alarm signal to a system control device through a line 7, also sends an electric power source cut-off signal to an electric power source control device 2 through a line 6 after a constant time has elapsed, and cuts off the electric power source by operating a relay K1. Before this electric power source is cut off, the system control device 3 receives a signal from the fault detectors a1-an through a level converting circuit 11 and a latching circuit 12, processing an interruption, saves a data, reads out a faulty place latch 12, and executes the processing to deal with a fault. |
