| 摘要 |
<p>PURPOSE:To secure the continuity of plant monitoring after recovery even if the monitoring operation of the plant monitor device is interrupted. CONSTITUTION:When the plant monitor device 11 recovers from a fault, a logical expression which is triggered with plant data inputted to a monitor control part 12 from a plant 20 through a data read part 13 is selected in a logical expression storage part 17 corresponding to trigger information on respective logical expressions stored in a trigger tag information table 18. When plural logical expressions are selected, a logical expression having combination conditions of plant data which are already inputted and plant data to be inputted next is selected. Then, when plural logical expressions are still selected, the logical expression having the closest input elapse information to the input elapse time of each plant data which are already inputted is determined on the basis of plant data input elapse information at the time of past logical expression holding which is by logical expressions in a past result information storage part 19 and the plant is monitored according to this logical expression.</p> |
