| 摘要 |
PROBLEM TO BE SOLVED: To make it impossible to simultaneously edit the same data on the same screen from plural consoles. SOLUTION: In the distributed type control, device for controlling a plant 3 by plural operator's consoles 11 to 1n , each console uses a common registered picture through an information LAN 2 and has a table for presenting the existence of reading/writing and priority in each data to be used for each picture, and when reading/writing data to be edited have been already registered by another console, the edition of the succeeding console is inhibited. |
