| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To ensure a reliable result of communication diagnosis by solving problems that the data reliability to the result of diagnosis is low to a slow power supply voltage change in a diagnostic device of a communication system, and the cost is increased if a low voltage detector is added, or the setting of an observation equipment is changed according to the kind, the performance or the like of the equipment to be controlled. <P>SOLUTION: In the system with a main device and an equipment to be controlled connected to each other, the minimum operation-guaranteed voltage of the main device is set to be low. When the operation of the equipment to be controlled becomes unstable due to the power supply voltage drop, the unstableness is detected and stored by the main device side, and stored in a diagnosis memory. In addition, if the power supply voltage is dropped below the minimum operation guaranteed voltage of the main device, the state is once stored, and the abnormality data is shifted when the equipment is re-started and in a stable state. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
