| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To realize simulation reducing load of a CPU and in the environment near real machine, even when a plant model simulating real plant and a simulation control part emulating function of a distributed control system are collected to the same computer. <P>SOLUTION: The minimum period among a plurality of operation periods set for each area storing tasks is assumed to be a basic period, and the least common multiple of the plurality of operation periods is assumed to be a unit period. Processing schedule is set so as to execute area, where start point of operation period comes to in an interval, until next boot order in short order of operation period when a boot order is given for each basic period. Thus, the number of times in which each task is executed in a unit period becomes the same one of the real machine, and the order of execution of tasks also becomes the same one of the real machine. Since the basic period can be lengthened than the one of real machine much, the load of the CPU for operation processing can be reduced and processing performance can be assigned to the processing etc. of a plant model. <P>COPYRIGHT: (C)2007,JPO&INPIT</p> |
