| 摘要 |
PURPOSE:To attain efficient processing by dividing a sequence into independent segment so as to decide the sequence of operation and executing the instruction only with an instruction added with a label corresponding to a change in an input state. CONSTITUTION:A data required for the operation is inputted to a central processing unit 34 via a card reader 31 and a console input/output device 33 and stored in a disc 35. A simulation control panel 37 is connected to the unit 34 via a process input/output device 36 and a set value of a setting device 371 is connected to the unit 34 via an analog input device 361, and the result of operation is displayed by an indication meter 373 or the like. A logical sequence such as plant control is programmed by it while being started periodically and subjected to operation processing. The processing devides the sequence into the independent segment by analyzing the relation of combination between the logical operating elements of the sequence so as to decide the sequence of operation in each segment. Furthermore, the input state is supervised at all times and only the instruction in said segment is executed from the instruction added with a label corresponding to the change. |
