| 摘要 |
<p>PURPOSE:To perform the present state reset processing at a high speed in response to a simulated change by recording the presence or absence of the state change of each facility as well as the present state and also recording the presence or absence of the state change of the facility caused by a simulated operation. CONSTITUTION:A host computer 1 contains a present drawing information storing area 3, a simulation drawing storing area 4, a present facility state table 5, a simulated facility state table 6, a state change recording part 7, and a simulated change recording part 8. The part 7 records the presence or absence of the state change of each facility as well as the present state and also records the presence or absence of the simulated state change of each facility. The part 8 records the simulated change history of the simulation drawing information. Then only the drawing information undergone the simulated change is reset to the present contents to reset the simulation drawing information to the present contents with reference to the part 8.</p> |
