JPH0731541B2 - Trend display - Google Patents

Description

The present invention relates to a trend display device for controlling and monitoring a process, and more particularly to a trend display device for displaying a plurality of process trend graphs in the same display area of the display device. Regarding

[Conventional technology]

The conventional trend display device is a method to display only the representative scale as described in Toshiba Electric KSP1533, or Anritsu CAT.
The method of displaying a large scale as described in NO.P45-46009M was used. However, the former is easy to erroneously read the true value because there is only one 0-100% scale for reading the information, and the latter is a large scale, so the number of display points can be limited due to the large screen space. It was

[Problems to be solved by the invention]

Conventional trend display devices do not consider scale points in trend displays that display time-series process quantities of process quantities with different industrial units and scales, and display only the representative scale of the whole. If you want to obtain a true value because it has not been done, manual calculation is necessary, it is easy to make an error, or if a large number of scales are displayed, it is displayed to display the scales of multiple industrial units on the same screen. There were problems such as not being able to increase the score.

An object of the present invention is to solve the problems of the conventional trend display device, to obtain an accurate value of desired information immediately without damaging the conventional monitoring function, with high quality, and with good screen efficiency. To provide a trend display device.

[Means for solving problems]

In a trend display device characterized by comprising a display device for displaying process information and a command input device and displaying process trend information on the display device, a plurality of trend graphs of the process are displayed as trend information on the display device. A plurality of trend graph display means for displaying in the same display area, a representative scale display means for displaying a representative scale between a plurality of trend graphs corresponding to a plurality of trend graphs, and a trend designated by an input device among a plurality of trend graphs It is characterized in that it is provided with selection graph scale display means for displaying the scale of the graph in correspondence with a plurality of trend graphs.

[Action]

According to the trend display device of the present invention, it is possible to display the representative scale between the displayed plurality of trend graphs, and to calculate and display the industrial unit and scale of the trend graph desired to be obtained by a simple operation. It becomes possible to read the change status of a specific trend graph while comparing it with other trend graphs.

〔Example〕

 An embodiment of the present invention will be described below with reference to FIG.

FIG. 1 shows the trend display screen 1 in the color display device,
The trend display screen showing the key input device 2 is a trend graph display frame shown by the tag No. 4 of each process amount shown by 3, the industrial unit scale shown by 5, and the representative scale of 6.
7 is composed of a trend graph representing each process amount in time series. In the conventional trend screen, the scale is represented by 6 in the area shown by 5 (0-10
(0%) is displayed and there is only one scale display. The present invention displays an equally-divided scale of industrial units corresponding to the tag No. indicated by the cursor display position of 8 in the area indicated by 5, and displays a pre-registered representative scale in the area indicated by 6. It is a thing.

Next, the motion screen flow chart according to FIG. 2 shows the motion, and the trend screen fixed information (see FIG. 1, 3, 4,
After displaying 6), the trend graph (Fig. 1) from the trend information table corresponding to each tag No. is displayed at 11, and the up / down key (Fig. 1 at 9) of the key input device is displayed at 12. It is determined whether a cursor operation has occurred, and if there is cursor movement, the following processing will not be performed.
Returning to the processing of 11, the processing of reading the cursor position information currently displayed is performed in 13, the industrial unit of the tag number corresponding to the cursor position and the scale information are calculated in 14, and the industrial unit equally divided in 15 is calculated. Display the scale. In this way, from each process quantity displayed on the screen, move the cursor to the measurement item name that is displayed in advance by simply moving the measurement item for which you want to obtain information, and move the cursor to the cursor position. It is possible to take out the industrial unit of the measurement item at, and calculate the scale and display it in the display frame. This scale display color is the same as the trend graph display color of the tag number corresponding to the cursor position.

According to this embodiment, the tag number of the process amount for which information is desired is acquired.
By aligning the cursor position with the UP / DOWN key, the industrial unit scale is displayed in the trend display frame so that the information can be easily read. There is an effect that information can be obtained without impairing the conventional function.

〔The invention's effect〕

According to the present invention, the industrial unit scale of the trend graph desired to be obtained can be displayed together with the representative scale of the plurality of trend graphs shown in the display area of the display device, so that the operator manually performs scale conversion or the like. Since it is possible to obtain the information of the target trend graph by associating it with other trend graphs without fail, it is possible to grasp the process information more accurately, and it is effective in safety of operation and prevention of erroneous operation. .

[Brief description of drawings]

FIG. 1 is a trend display screen view in a color display device according to an embodiment of the present invention, and FIG. 2 is an operation flow chart in display processing. 1 …… Trend display screen, 2 …… Key input device, 3 ……
Tag No., 4 ... Trend display frame, 5 ... Industrial unit scale scale, 6 ... Representative scale scale, 7 ... Trend graph, 8 ... Cursor, 9 ... Up / Down key.

Claims (1)

[Claims] 1. A trend display device comprising a display device for displaying process information and a command input device, wherein trend information of the process is displayed on the display device, wherein the process is used as the trend information. A plurality of trend graph display means for displaying a plurality of trend graphs in the same display area of the display device, a representative scale display means for displaying a representative scale between the plurality of trend graphs corresponding to the plurality of trend graphs, A trend display device comprising: a selected graph scale display means for displaying a scale of a trend graph designated by the input device among a plurality of trend graphs in correspondence with the plurality of trend graphs.