| 摘要 |
<p>PROBLEM TO BE SOLVED: To surely grasp degradation with the passage of time or to surely analyze abnormality by also storing handy terminal data together with on-line plant data. SOLUTION: A history data buffering preserving means 3 preserves the plant data read from a process input processing means 2 into a temporary history data preserving file 5 as on-line data. A handy terminal data fetching means 6 fetches data from a handy terminal as the handy terminal data. A history data recording means 4 stores the handy terminal data and the on-line data into an external mass storage device 13 as history data together with index information. When there is an output request, a table preparing means 8 extracts these data from the external mass storage device 13 as the history data based on the index information and outputs a table to a table output device 17.</p> |
