| 摘要 |
PROBLEM TO BE SOLVED: To easily determine update timing of a unit space to be utilized for abnormality diagnosis of a plant.SOLUTION: An abnormality diagnostic device includes: an extraction part 16 which extracts values in a period predetermined for a sample as sample data among values of environmental variables to be influenced by variation of environment, and extracts values in a predetermined period immediately before timing for determining update of a unit space as object data from an accumulation data storage part 21 which stores accumulation data including a setting value of an operation of a plant and a measurement value measured in the plant as variable representing a state of the plant in the case of the setting value; and a determination part 17 which determines, when difference between an average value of the sample data extracted by the extraction part 16 and an average value of the object data is out of a predetermined range, that it is update timing of the unit space. |
