| 摘要 |
PURPOSE:To easily discriminate a faulty position without a time lag and increasing monitor information by allowing a reception section to generate and output a prescribed signal based on the monitor information from a transmission section. CONSTITUTION:A main signal from a transmission section 12 of a transmitter 10 is sent to a receiver 20 via a transmission line L1. A monitor circuit 13 of the transmission section 12 monitors the main signal and detects a fault, then a monitor signal is sent to a monitor section 11 and sent to a NAND circuit 25 in a reception section 22 via an information line L3. The reception section 22 monitors the input of the receiver 20 by using a monitor circuit 23 to send the monitor signal to the monitor section 21. A configuration section 26 monitors an output of the reception section 22 by using a monitor circuit 27 and the monitor result is returned to the reception section 22. A monitor signal is sent to the circuit 25 on the occurrence of a fault. The monitor section 21 combines an output signal of the circuit 23 and an output signal of the circuit 25 to discriminate a fault location based on the output signals from the circuits 23, 25 at the time of the occurrence of a fault in the main signal. |
