| 摘要 |
<p>PROBLEM TO BE SOLVED: To efficiently record plant data according to the characteristics so that they can be stored for a long period by editing the sectional plant data which are transmitted at a constant period in time series and generating and storing several kinds of time-series data differing in recording cycle. SOLUTION: A time-series data storage means 9 takes the plant data out of a data gathering temporary storage file 7 and converts them to a time-series recording format, and then saves them in a time-series data storage file 11. At this time, a high-speed data file 11a, an intermediate-speed data file 11b, and a low-speed data file 11c are generated. An external storage device recording means 13 records the specific data, spooled in the time-series data storage file 11, in an external storage device EM. A data retrieval means 15 takes object data out of a magnetic disk for the time-series data storage file 11 when the data are present, and takes data out of the external storage device EM when not.</p> |
