| 摘要 |
<p>PURPOSE:To provide possibility of operating a plant safely by displaying the input value and deviation value of monitoring parameters in mutual relationship, and displaying the parameters and deviation value trend graph when requested by the operator. CONSTITUTION:A deviation calculating means 3 reads monitoring parameters of a plant 1 via a plant data input means 2, calculates the deviation value using an approximation formula representing the correlation between two parameters X, Y in closer relationship with each other, and gives the result to and displays on a CRT display means 4 together with the input amount. When the operator wants to display the trend graph, he specifies monitoring items from an input means 13, and the request signal is sent to a trend graph preparing means 12. Receiving the request signal, the means 12 prepares the graph picture field data, sends it to the CRT display means 4, and displays in part of the screen. This permits the operator to grasp the condition of the plant accurately in a short time, which enables safe operation of plant.</p> |
