| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a state detector, a state detection method, a state detection program and a state detection system, in which occurrence of a serious abnormality can be detected based on a detection value changed according to a change of a state. <P>SOLUTION: An occurrence rate per day for each error item is derived, and the resulting occurrence rate is stored as history in a database 34. Every time when the occurrence rate is derived, a threshold is derived based on the history of occurrence rate stored in the database 34, whether the state is normal or abnormal is determined by comparing the occurrence rate of the day with the derived threshold, and a display control circuit 30 is controlled to display and report the determination result on a display device. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
