| 摘要 |
PURPOSE:To input an abnormal signal to a built-in microcomputer so as to indicate the generation of a failuar with no special alarm device by switching on and off a protection lamp with a detected abnormal signal of a selected input signal contineued over a specified time period. CONSTITUTION:When a signal [a] is inputted from a pull switch 4 to a microcomputer 8 for a specified time to be recognized as an abnormality, for instance over 5sec, the signal is counted up with a counter built in the microcomputer 8 to detect as an abnormal input signal, and an alarm signal is outputted to switch on and off a protection lamp 3. And an abnormal input signal [c] from a home computer 7 continuing over 5sec due to such as a failure of an interface is also counted up to detect the duration of over 5sec, and the protection lamp 3 switched on and off. |
