| 摘要 |
PURPOSE:To search a fault efficiently by recording a siganl inputted from a keyboard. CONSTITUTION:At the input of data from the keyboard 1, a switching part 2 connects a connection line 10 with a connection line 20. Under said status, a part of the keyed data from the line 10 is converted into a parallel signal by a serial/parallel converter 6 and then converted into an analog signal by a digital/analog converter 7 and the analog signal is guided and recorded to/in a recording part 4. When a fault is generated in the system due to some reason, the contact of the switching part 2 is turned to the direction shown by a dot line and the analog supervising signal stored in the recording part 4 is guided to a terminal controlling part 5 through an A/D converter 9 and a parallel/resial converter 8. The analysis of the signal makes it possible to search efficiently the fault. |
