| 摘要 |
<p>PURPOSE:To improve the safeness of operation and the efficiency of operation by previously constituting the diagnostic logic of a plant as a logical tree and simplifying the detection of a cause of trouble generation and the forecasting of trouble expansion by an operator on the basis of the logical relation of causes and effects in the logical tree. CONSTITUTION:Logical tree display 1 consists of nodes N indicating abnormal diagnostic points of a plant, message display means M and time element display means T. A detection signal of a logical value corresponding to limit value in each detection point arrives each detection point node (N1-3), (N6-8). The message display means M display the contents of nodes and/or the contents of operation to be performed by the operator. The time element display means T display the timing after the prescribed set time in case of performing the succeeding abnormal diagnosis based upon the results decided by the nodes. When an abnormal diagnostic output is applied to the node N5, the generation of the default and the contents of its counterplan are displayed on the message display means M3 and M4.</p> |
