Patent Document ID: 20050203696
Application ID: 11088844
Patent Flag: 0

Claim One:
1. A control system abnormality diagnosis system of a plant comprising: a control system abnormality cause-and-effect matrix in which abnormality causes generated in a plurality of devices constituting the control system of the plant are correlated with characteristics of plural kinds of abnormal phenomena generated in the control system because of abnormalities of the devices for running states of the plant by weighting scores in accordance with correlativity thereof; a control system abnormality cause-and-effect coefficient matrix in which for the characteristics of the plural kinds of abnormal phenomena generated in the control system of the plant, weighting factors are set with respect to the abnormality causes generated in the plurality of devices constituting the control system differently for states of associated devices thereof, an abnormal phenomenon input element that inputs the characteristics of the abnormal phenomena generated in the control system together with the running state of the plant and the states of the associated devices; a cause analysis element that analyzes the abnormality causes generated in the control system of the plant based on the weighting scores obtained by the control system abnormality cause-and-effect matrix and the weighting factors obtained by the control system abnormality cause-and-effect coefficient matrix from the characteristics of the abnormal phenomena input from the abnormal phenomenon input element, the running state of the plant, and the states of the associated devices; and a diagnosing result output element that outputs the abnormality causes of the plant analyzed by the cause analysis element as diagnosing results.