JPH04326483A - Device for displaying and monitoring process - Google Patents

Abstract

PURPOSE:To simultaneously enlarge and display a trend graph inside a designated area on a CRT display device with the display of the original trend graph by designating an optional position inside the trend graph displayed in the CRT display device. CONSTITUTION:This device is provided with a trend graph enlargement calculating part 7 inputting a position signal designating an optional enlargement area inside the trend graph displayed in the CRT display device 1 and calculating the display range of the enlargement trend graph based on previously registered display information and a trend graph enlargement display processing part 8 taking out sampling data stored in a sampling data preservating part based on the display range calculated in the trend graph enlargement calculating part 7 so as to display it in the enlargement trend graph so that the enlargement trend graph is simultaneously displayed in the CRT display device 1 which is displaying the trend graph.

Description

[Detailed description of the invention]

[Object of the invention]

0002

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process display and monitoring device for monitoring plant conditions by displaying moment by moment plant data in graphs on a display device.

0003

[Prior Art] One method of monitoring the state of a plant is to display the process amount from the plant and the plant state as a trend graph on a CRT display according to an operator's request, thereby monitoring the trend of the operating state of the plant. It is taken more. On the trend graph screen, the display time range of the plant data that the operator wants to display,
You can freely create a trend graph by registering trend graph display information such as the upper and lower display limits of the graph. In the trend graph for viewing trends in plant operating status,
Displaying all the data sampled from a plant may make the graph complicated and difficult to read. For this reason, data for each fixed period of time is selected and used for displaying the graph, but the C
The display time width and display update period are set so that the points plotted on RT are spaced at least several dots apart. This displays a smooth trend graph, allowing you to monitor trends in the general operating status of your plant. However, if you want to display the detailed operating status of a plant on a trend graph, the conventional method is to enlarge the display by resetting the display time width on the horizontal axis and the display upper and lower limits on the vertical axis. was. This method requires changing the trend graph display information registration itself, so if you want to return to the original display, you will have to change the trend graph display information registration again, and the trend graph and enlarged trend graph will be displayed at the same time. I couldn't.

FIG. 10 shows an example of a conventional process display monitoring device, in which a CRT display device 1 and an operator A
An input/output device B consisting of input devices 2 such as a keyboard 2a and a mouse 2b for input operations while looking at the display device 1
and a trend graph display information storage section 3 that saves the information necessary for plotting a trend graph as a registration file, and an input device 2 to the registration file of the trend graph display information storage section 3.
A trend graph display information registration processing unit 4 that registers information input through the system; a sampling data storage unit 5 that stores momentary data sampled from the plant; A trend graph calculation device D having a trend graph display processing unit 6 that starts sampling and temporarily stores the data in the sampling data storage unit 5 and displays the data on a trend graph based on information from the trend graph display information storage unit. It is configured.

In such a conventional process display monitoring device, an operator A uses a keyboard 2a and a mouse 2.
b etc., in an interactive manner with the trend graph display information registration processing section 4 in the trend graph calculation device D.
Create a registration file to be saved in the trend graph display information storage section 3. The registration file of the trend graph display information storage section 3 records designation of data to be displayed in a trend graph, display update cycle, display time width, display upper and lower limit values, and the like. The trend graph display processing unit 6 is operated by operator A.
In response to the trend graph display request, the trend graph display information is input from the registered file in the trend graph display information storage section 3 that has already been registered, the current value of the data to be trended is input from plant C, and sampling is performed once. A trend graph is created from the data stored in the sampling data storage section 5 and displayed on the CRT display device 1.

[0006] Here, if operator A wants to display further details of the process in a trend graph, he can shorten the trend graph display time width or reduce the width of the upper and lower display limits using the same method as described above. The enlarged display of the trend graph was performed by changing the data of the registered file in the display information storage section 3.

[0007] In order to display the trend graph in an enlarged manner as described above, it was necessary to re-register or change the trend graph display information.

[0008]

[Problems to be Solved by the Invention] As mentioned above, in the method of displaying an enlarged trend graph by changing the registered data of trend graph display information, once it is enlarged, the trend graph cannot be displayed again to return to the original size. The information registration data must be restored and displayed as before. Therefore, it is not possible to simultaneously view a trend graph that schematically displays the trend of the operating state of the process and a trend graph that displays the trend in detail. Furthermore, when setting the trend display information registration data when viewing a detailed trend display, the operator must consider how to set the display time range and upper and lower display limits to display details in an easy-to-see manner. It was a hassle because it didn't have to happen.

The present invention has been made to solve the above conventional problems, and allows the operator to set the display time width and upper and lower limits of the display by specifying an arbitrary position within the displayed trend graph. To provide a process display device capable of displaying an enlarged detailed trend graph simultaneously with the original trend graph without consideration.

[Configuration of the invention]

[0011]

[Means for Solving the Problems] That is, the present invention provides a trend graph display information storage unit that stores a registered file in which information necessary for drawing a trend graph is registered in advance, and a sampling system that stores momentary data sampled from a plant. Based on the data storage section and the operator's trend graph display request entered through the input device, the necessary information is retrieved from the trend graph display information storage section and displays the upper and lower limits of the vertical axis of the trend graph and the display time width of the horizontal axis. and a trend graph display processing unit that sets a display update cycle and retrieves data requested for display from a sampling data storage unit and displays it on a trend graph, and a display device that displays a trend graph from this trend graph display processing unit. In a process display monitoring device, a position signal specifying an arbitrary enlarged area within the trend graph displayed on the display device is input via the input device, and the enlarged trend graph is displayed based on the information in the trend graph display information storage unit. A trend graph enlargement calculation section that calculates a display range, and a trend graph enlargement display processing section that displays data read from a sampling data storage section on an enlarged trend graph based on the display range calculated by the trend graph enlargement calculation section. The display device is characterized in that it displays a detailed enlarged trend graph from the trend graph enlargement display processing section together with the trend graph from the trend graph display processing section.

0012

[Operation] In the trend graph enlargement calculation unit of the process display monitoring device of the present invention, the operator inputs the coordinates on the CRT of a specified position within the trend graph display area using the mouse, and uses the registered data in the trend graph display information storage unit. , the time range of the portion to be enlarged and the upper and lower limits of the display value are calculated and communicated to the trend graph enlargement display processing section. The trend graph enlargement display processing section retrieves the data collected within the specified time range from the sampling data storage section, edits the detailed trend graph in a separate window based on the specified upper and lower limits, and displays it on the CRT. Display output on a display device.

[0013] With this, while displaying the general trend graph, the operator can enlarge any position on the general trend graph to display it in detail.
Data for enlarged display is retrieved and displayed from the sampling data storage unit that has already been collected, so the display resolution is improved in addition to simply enlarging the rough trend graph that is already displayed. Can be done. As explained in the conventional technique, for the general trend graph, the display time width and display update period are set so that it is a smooth graph for monitoring the overview, so the data stored in the sampling data storage unit is Not all are displayed. Therefore, data that is not displayed is stored in the sampling data storage section. The enlarged display can improve resolution because it includes this data that is not displayed in a normal trend graph.

[0014]

Embodiments Hereinafter, embodiments of the present invention will be described based on the drawings. In addition, in the drawings, the same reference numerals are added to the same parts as in the conventional example. FIG. 1 shows an embodiment of the process display monitoring device of the present invention, which includes an input/output device B consisting of a CRT display device 1, input devices 2 such as a keyboard 2a and a mouse 2b installed thereon, and a trend graph plotter. A trend graph display information storage section 3 stores a registration file in which necessary information is registered in advance; a sampling data storage section 5 stores momentary data sampled from plant C; a trend graph display information storage section 5 stores trend graph display requests from operator A; A trend graph display processing unit 6 that reads data requested to be displayed based on the registered information in the graph display information storage unit 3 from the sampling data storage unit 5 and outputs it as a trend graph to be displayed on the CRT display device 1, and enlarges the inside of the trend graph. A trend graph enlargement calculation unit 7 inputs a position signal specifying an area and calculates a display time range and display upper and lower limit values of an enlarged trend graph based on information in the trend graph display information storage unit 3, and this trend graph enlargement calculation unit. The trend graph calculation device D includes a trend graph enlargement display processing section 8 that displays the data in the sampling data storage section 5 in an enlarged trend graph based on the results calculated by the section 7.

Next, the operation of the process display monitoring device having the above configuration will be explained. First, when operator A makes a trend graph display request a using the keyboard 2a and mouse 2b, this request is input to the trend graph display processing section 6. The trend graph display processing unit 6 retrieves the requested trend graph display information from the trend graph display information storage unit 3, periodically inputs the current value of data for trend display from the plant C, and stores the data in the sampling data storage unit 5. While saving the sampling data in
Data for trend display is taken out from the sampling data storage section 5, trend graph display data b is edited, and displayed on the CRT display device 1.

[0016] Here, the trend graph display information storage section 3
FIG. 2 shows an example of the configuration of a registered file in the storage unit 5, and FIG. 3 shows an example of a sampling data recording configuration in the sampling data storage unit 5. A plurality of trend groups can be registered in the registration file in the trend graph display information storage section 3, with some related plant data being set as one group (hereinafter referred to as a trend group). Each trend group i (i = 0, 1, 2, ..., n) includes a trend group name 201, its group number 202, a station number 203 for determining the monitoring target, and a CPU.
A number 204, a display update period 205 indicating the time interval plotted on the trend graph, a display time width 206, which is the horizontal axis of the trend graph display area, a point in the plant that outputs data to be displayed on the trend graph (hereinafter referred to as a trend point). ) to identify the wire numbers 2070 to 207k that indicate each curve on the graph, and the display upper limit value 2080 to 207k of the data for each trend point.
208k and lower limit values 2090 to 209k are registered.

The sampling data storage section 5 is an area for collecting and storing data of one trend group (hereinafter referred to as trend data), and includes a registration pointer 301 indicating the position where sampled data is to be registered in the storage section 5;
A registration counter 30 that indicates up to which position trend data is valid when the registered data does not reach the maximum number of registrations N.
2. Time 303 when collecting data stored in the storage unit 5 was started
At the same time, trend data 304 consisting of instantaneous value data 3040 to 304k of each trend point for each sampling period is sequentially stored.

When displaying trend data on the CRT display device 1, the trend graph display processing unit 6 receives the display time width 206 of the trend data and the upper and lower display limits 20 of each trend point from the trend graph display information storage unit 3.
8,209, set the scale of the horizontal axis, which is the time axis of the trend graph display area on the CRT display device 1, and the scale of the displayed value of the vertical axis for each trend point, and store it in the trend graph display information storage section 3. Based on the display update cycle 205 of the registered trend graph, trend data is selected from sampled trend data in the sampling data storage section 5 at every display update cycle and displayed. This is to omit some of the collected data and display it because if all the data is displayed when monitoring the general operating trends of the plant, the movement of the trend graph will become complicated and difficult to read. be. When displaying a trend by omitting some of the sampling data in this way, the display update period τ (seconds)
The number of dots χ in the graph displayed is set to be at least 3 dots, and it is calculated using the following formula. Trend graph display area The number of time axis dots is X, the display time width is T (seconds), the sampling period is s (seconds), and if data for each κ sampling number is used for display, χ = τ・X /T=κ・s・X/T(dot)≧3 Therefore, the value of κ is the smallest integer that satisfies the following equation. κ=τ/s≧ 3T/(s・X)
(1) By extracting the trend data 304 in the sampling data storage unit 5 for each κth calculated in this way and displaying the trend, the number of dots between plots becomes 3 or more and the graph becomes complicated. Easy-to-read trend graphs can be displayed.

Next, when the operator A wants to monitor the detailed operating trends of the plant, the operator A specifies the start and end points of an arbitrary rectangular area within the trend graph display area using the mouse 2b, thereby determining the coordinates c of the trend graph enlarged position. is input to the trend graph enlargement calculation section 7. For example, for the starting point, turn on the left click of the mouse 2b, and for the end point, turn off the left click of the mouse 2b to specify the starting point and the ending point.

As shown in the flow of processing in FIG. 4, the trend graph enlargement calculation unit 7, when inputting an enlargement area start point (401), extracts the specified start point coordinates (
402), if it is the end point (403), confirm that the start point has already been input (404) and extract the end point coordinates (405). In this way, by inputting the starting point coordinates and ending point coordinates of the rectangular area, the display time width 206 in the trend graph display information storage section 3 and the display upper and lower limits of data for each trend point 2080 to 208k, 209
From 0 to 209k, the time range of the specified enlargement area (406) and the upper and lower limit values for enlarged display of the data of each trend point are calculated (407), and the trend graph enlarged display processing unit 8 is notified to start. (408
).

FIG. 5 schematically shows the relationship between the trend graph on the CRT display device 1 and its enlarged trend graph. In order to explain the enlargement operation in an easy-to-understand manner, only data α of one trend point is shown as an example. ing. Operator A can display a detailed trend graph in a separate window 503 while viewing the general trend graph by specifying any rectangular area 502 within the conventional trend graph display area 501 with the mouse 2b. By displaying and viewing the detailed trend graphs simultaneously on the CRT display device 1 in this manner, it is possible to visually judge the relative position of the detailed trend graph in the overall trend graph.

Using FIG. 5, the method of calculating the enlarged display time range (406) in the trend graph enlargement calculation unit 7 and the calculation of the upper and lower limits of each trend point data (407)
The method will be explained below. The coordinates of the starting point O of the trend graph display area 501 are (O
x , Oy), the coordinates of the end point P are (Px, Py), and the coordinates of the starting point Q of the rectangular area 502 to be enlarged are (Qx
, Qy), the coordinates of the end point R are (Rx, Ry), the display time at point P is the current time tP, and the display time at point O is tO. Since tP - tO = T, the enlarged display start time is tQ, enlarged display end time tR is tQ = tP - |Px -Qx |・T/|Px -
Ox |tR =tP −|Px −Rx |・T/|
Px −Ox |, and the range of enlarged display time can be calculated. In addition, the display upper limit value of trend point data α is Hα,
When the display lower limit value is Lα, the enlarged display upper limit value H′α and lower limit value L′α are calculated by the following formula: H′α=Hα− |Oy −Qy |・|Hα−
Lα|/|Oy −Py | L′α=Lα+|
Py -Ry ｜・｜Hα-Lα｜/｜Oy -Py
Calculated from |

The trend graph enlargement display processing section 8 is shown in FIG.
As shown in the flowchart, the trend graph enlargement calculation unit 7
Based on the enlarged display time range (601) and the enlarged display upper and lower limits (602) of each trend point data notified by
3 to 606), create enlarged trend graph display data d (607), and display and output it to the CRT display device 1 (607).
08).

Note that, as shown in (605) in FIG. 6, all the trend data sampled in the enlarged display time range is used for enlarged display, but even in the enlarged trend graph, the normal trend graph Similar to equation (1) when displaying, the following equation κ′=τ′/s≧ 3T′/(s・X′)
…According to (2),
It is also possible to sequentially extract the trend data within the enlarged display time range in the sampling data storage section 5 every κ' and display an enlarged trend graph that is easy to see. However, in equation (2), τ' is the enlarged display update period, T' is the enlarged display time width, and X' is the number of time axis dots of the enlarged window.

Even in this case, since the time per dot T'/X' of the enlarged display trend graph is smaller than the time per dot T/X of the normal outline display trend graph, (1) , (2), the value of the interval κ' of the trend data retrieved from the sampling data storage unit 5 can also be made smaller than κ, and a detailed trend graph with high resolution can be displayed according to the enlargement ratio. be able to.

FIG. 7 shows another embodiment of the process display monitoring device of the present invention, in which the trend graph enlarged display processing section 8 responds to the enlarged display scroll request e from the operator A.
' is input as shown in the flow diagram of Figure 8 (8
01) The enlarged display time range is shifted (802), and the same enlarged display processing as shown in FIG. 6 is performed below.

That is, in this embodiment, scrolling of the enlarged display is enabled, and operator A can enlarge and display any position in the trend graph display without specifying the enlarged display position each time. .

Furthermore, in the method of specifying the trend graph enlargement position, the method of specifying the start point and the end point has been described, but in addition to this method, the enlargement position can also be specified by the center point of the enlargement area. In this case, the enlargement rate of the trend graph is set in advance. FIG. 9 shows the processing flow of the trend graph enlargement calculation unit that can take both enlargement position specification methods. When the center point to be enlarged is specified by clicking the middle mouse button (901), the center The coordinates are extracted (902), and an enlarged display time width is calculated so that the coordinates are enlarged at a predetermined magnification with the time position as the center (903).
). With this center point designation method, operator A does not have to designate two points, the start point and the end point, of the enlarged area, and the enlargement operation can be simplified.

[0029]

[Effects of the Invention] As explained above, according to the present invention,
Any position can be enlarged and displayed while the trend graph is being displayed, and an enlarged trend graph with a high resolution can be displayed according to the enlargement ratio to the extent that the graph does not become complicated. In addition, since the enlarged display is in a separate window, it can be displayed at the same time as the original trend graph.
Since a large amount of information can be displayed simultaneously on the display device and any position within the overall display of the trend graph can be specified, it is possible to visually judge the relative position of the enlarged display position in the overall display. be. . As a result, the operability of the trend graph display can be improved and the monitoring function can be enhanced.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of a process display monitoring device of the present invention.

FIG. 2 is a diagram showing an example of the configuration of a registration file in a trend graph display information storage section.

FIG. 3 is a diagram showing an example of data storage in a sampling data storage unit.

FIG. 4 is a flow diagram showing an example of the operation of a trend graph enlargement calculation section in the present invention.

FIG. 5 is an image diagram for explaining a trend graph enlargement operation in the present invention.

FIG. 6 is a flow diagram showing an example of the operation of a trend graph enlargement display processing section in the present invention.

FIG. 7 is a block diagram showing another embodiment of the process display monitoring device of the present invention.

8 is a flowchart showing the operation of a trend graph enlargement display processing section in the process display monitoring device of FIG. 7. FIG.

FIG. 9 is a flowchart showing another example of the operation of the trend graph enlargement calculation section in the present invention.

FIG. 10 is a block diagram showing the configuration of a conventional process display monitoring device.

[Explanation of symbols]

1……CRT display device 2a...Keyboard 2b... Mouse

Claims (1)

[Claims] [Claim 1] A trend graph display information storage section that stores a registered file in which information necessary for drawing a trend graph is registered in advance, a sampling data storage section that stores momentary data sampled from a plant, and a In response to the operator's trend graph display request inputted by the operator, the necessary information is retrieved from the trend graph display information storage section, and the display upper and lower limits of the vertical axis of the trend graph, the display time width and display update period of the horizontal axis are set, A process display monitoring device comprising a trend graph display processing unit that reads data requested to be displayed from the sampling data storage unit and displays it on a trend graph, and a display device that displays the trend graph from the trend graph display processing unit, A position signal specifying an arbitrary enlarged area within the trend graph displayed on the display device is input via the input device, and a display range of the enlarged trend graph is calculated based on information in the trend graph display information storage unit. a trend graph enlargement calculation unit that displays the data read from the sampling data storage unit on an enlarged trend graph based on the display range calculated by the trend graph enlargement calculation unit; The process display monitoring device is characterized in that the display device displays a detailed enlarged trend graph from the trend graph enlarged display processing unit together with the trend graph.