| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent the normal end of a system software from being disabled by turning off a power source before communication end processing even in the case of requiring long time for the end processing of communication with external equipment when power source turning-off processing is performed. SOLUTION: This device is provided with a system software 2 connected with external equipment 4 through a communication line 5 so as to input a power source off signal 10 from a power source turning-off means 3, system software abnormality detecting circuit 12 for detecting the abnormality of this system software 2, power source off control switching circuit 15 for ANDing the input signal 10 from the power source turning-off means 3 and an output signal from the system software abnormality detecting means 12 and ORing this ANDed result and a power source off control signal from the system software 2, and power source off circuit 8 for turning off the power source according to a power source off signal 17 from this power source off control switching circuit 15.</p> |
