| 摘要 |
PURPOSE:To prevent disturbance to other terminals by disconnecting a terminal in a bus transmisson system from a transmission circuit when trouble occurs to the terminal. CONSTITUTION:When neither the transmission circuit 1 nor a terminal 2 is abnormal, communication is performed by a reception decision making cicuit 7, transmitting circuit 8, and transmission/reception logical part. If circuit abnormality is detected 6, a switch 3 is opened by a relay driving circuit 4 to disconnect the terminal 2 from the transmission circuit 1. Then if the abnormality still occurs even after the terminal is disconnected, it is evident that its own terminal is in trouble, so fault display is performed on an LED12 for displaying its terminal fault. When its terminal is normal, the disconnection is released to check whether the circuit is released or not. |
