| 摘要 |
PURPOSE:To enable a monitor to grasp at first sight the progress of a plant and identify promptly a cause of abnormity, if any, by classifying a control logic pattern by color into satisfying or non-satifying part of a condition and demonstrating them on a display. CONSTITUTION:While the control of a plant 1 is in progress, if abnormality takes place or a request for display is made from the outside, a logic control part 2 outputs an instruction signal for logic display (c) and logic identifying signal (d) which identifies a logic to which display has been instructed. A logic convertor 4 that receives these signals (c) and (d) reads logic data in one unit (e) from various tables in a logic memory part 3 and converts them into data for display of a logic pattern (f) to be used for AND/OR symbol display. This pattern (f) is classified into satisfying or non-satisfying parts of a condition by a condition deciding part 5 to make a colored display signal which is demonstrated on a display device 6. |
