| 摘要 |
PURPOSE:To prevent the missing of the input information when a fault occurs, by adding the memory function as a part of a transmitting device. CONSTITUTION:In case a fault occurs in the using system under operation, the output signal (b) of the memory part 22-1 disappears with a delay of a certain time. The transmission line fault detecting circuit 26-1 detects the fault and then produces the alarm signal (f) with a delay of a certain time. On the other hand, the input signals are supplied continuously to the standby system in the memory part 22-2. Accordingly, the switch part 23 works by the switch controlling signal (g) of the switch controlling part 24. The missing of the input information is prevented when the memory parts are switched from 22-1 to 22-2. |
