JPH0448217A - Crt trend display system - Google Patents

Abstract

PURPOSE:To reduce the load of plant operation control, plant state analyzing operation, etc., and to prevent an error by providing a means stored with information on operation, an accident, etc., as time-series data and a means which decides the point of time of the operation, accident, etc., and retrieves and displays trend graph data at this point of time. CONSTITUTION:The system is provided with an event data storage file 16 stored with data on the start, stop, accident, etc., (event) of plant equipment, time-series data retrieval logic 17 which decides the time of event occurrence according to an event data recognition data inputted on a keyboard 13 and retrieves the trend data with the occurrence time, trend data switching logic 18 which switches the trend display data between current value data and the data retrieved by the time-series data retrieval logic 17, etc. Therefore, the process data can be retrieved through easy operation with information on an event which is its variation factor.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention is directed to CRTs used for monitoring various plants, etc.
This invention relates to a method for searching trend graph data using information such as operations and accidents as keywords and displaying the trend graph in a trend display system.

Additionally, this invention can be used to monitor various plants, etc.
This invention relates to a method for displaying information on operations, accidents, etc. in chronological order in the cRτ trend display system.

[Prior Art] FIG. 7 is a block diagram of a conventional trend display system disclosed in, for example, Japanese Unexamined Patent Publication No. 59-171000. In this Figure 7, PR is an external process, l is a process input/output device, 2 is a data reading logic, 3 is a time series data storage file, 4 is a trend data output conversion logic, 5 is a CRT, 6 is a light vent, 7 is a time series data save file, 8 is an address time conversion logic, 9 is a light pen interrupt analysis logic, IO is a data memory for digital value display, 11 is a digital data output conversion logic, and 12 is a data collection specification according to a schedule. 13 is a keyboard for performing screen display request operations, and 14 is a display controller for controlling screen display and interrupts (input/output).

Moreover, FIGS. 8 to 12 are explanatory diagrams of the above-mentioned conventional example. Here, Fig. 8 is a data structure diagram in the time series data storage file; Fig. 9 is an explanatory diagram of the light ben indication of the trend graph; Fig. 10 is an explanation of the light ben indication coordinates of the trend graph. Figure; 1st
FIG. 1 is an explanatory diagram of operations up to the display of digital values of a trend graph; and FIG. 12 is an explanatory diagram of the trend graph display.

Next, the operation of the above conventional example will be explained. As shown in FIG. 7, data at each point in the process is sequentially input to the process input/output device 1 from an external process PR, read at regular intervals according to the timing generated from the timing generator 12, and is read in at regular intervals, such as scale conversion, etc. After processing, the data are stored in time series in the time series data storage file 3. Note that data reading, processing, and storage are processed by the data reading logic 2. Further, the time series data in the time series data storage file 3 has a structure as shown in FIG. Trend screens are managed by screen numbers, etc., and trend data (data items) in the time series data displayed on the CRT are determined for the requested screen number. If you use the screen display request keyboard 13 to request a trend screen display, the display controller 1
4, the trend data output conversion logic 4 is notified of the request contents, and the trend data for trend display stored in the time series data storage file 3 is converted into a display graph by the trend data output conversion logic 4. RAk in display control 14 converted to format
1, and a trend screen as shown in FIG. 12 is displayed.

At this point, the contents of the time-series data storage file 3, that is, the time-series data that sets the current time as the latest data set time, are transferred to the time-series data save file 7 according to a command from the display controller 14. Therefore, the data on the currently displayed trend screen and the period in which the time series pigs in the time series data save file were collected correspond. The data in the time series data storage file 3 is updated at regular intervals and always has the latest data.

Therefore, as shown in the trend screens of FIGS. 9 and 11 (A), when the actual measured value of point P is required, it can be seen by visual measurement that 5:40 is approximately 115, but the accuracy is low as it is.

Therefore, by pointing to point P with a light ben as shown in FIG. 11(B), it is possible to know the time and actual measured value. First, by pointing the point P with the light ben 6, the scanning timing at that point is notified to the display controller 14, and the coordinates of the point P with point B as the origin are known to the light ben as shown in Figure 1O address time conversion diagram. As a technique, it is obtained in the form of (point P) = (x+, y+). Next, the light ben interrupt analysis logic 9 calculates the time of lighting using the following formula. That is, (x
+, Y +) is within the diagonal line shown in Figure 10, then (X+
, y+) is Xm+n where x, 1x=number of dots from point B to point C X mt
n=Number of dots per minute Thus, from equation (1), it is determined that the time corresponding to the coordinate X is a time "MIN minutes before" the latest time of the displayed data. Next, the address/time conversion logic 8 converts the value of “tlN minutes ago” to an address, and from the contents of the time series data save file 7 “
1111 minutes ago" is taken out and stored in the data memory 10 for digital value display.

The data stored in this digital value display data memory 10 is the requested actual measurement value, and is converted into output data in a display format by the digital data output conversion logic 11 and displayed on the CRT 5.

The display format is as exemplified by the digital display format DD in FIGS. 11(C) and (D), and displays the time indicated with the light pen and its actual measured value. In addition, when displaying data from several measurement points superimposed, the color or R used in the trend graph will correspond to the graph and digital values.
(Red), G (Green), Y (Yellow), etc. are used for display. In this case, data from the same time will be displayed simultaneously.

[Problems to be Solved by the Invention] In the conventional CRT trend display system, a parameter trend graph and a digital value of the parameter at a specified time are displayed on the CRT.・Information on operation items is only stored in a separate system, and CR
T was not displayed, and it was not immediately possible to determine which part of the trend graph the accident/operation occurrence corresponded to. In addition, when searching for and comparing trend graphs that correspond to the same accident/operation that occurred in the past, the information sources for the trend graph and its change factors and related items are different, so the workload is reduced. However, there were other problems, such as the possibility of errors.

This invention was made to solve the above-mentioned problems, and aims to provide a trend display system that can reduce the burden of plant operation management and plant condition analysis work, and prevent errors.

[Means for Solving the Problems] The CRT trend display system according to the present invention determines the time of an operation/accident by specifying information such as the operation/accident as a keyword, and displays trends for a specified time before and after this time. This is a search for graph pigs and a trend graph display.

Furthermore, the CRT I-rend display system according to the present invention can display the data of a given point in a digital value by specifying an arbitrary point on a trend graph with a simple operation, and can also specify the time before or after the specified point. Change factors of the parameters of the trend graph and related device operation items are displayed on the trend screen along with the time.

[Function] Parameter trend graphs are displayed on the CRT.In addition to displaying digital values at specified times, trend graph data is searched and displayed based on operation and accident information, so there is no need to worry about missing data or other problems that occur when analyzing process data. The complexity of comparing and determining data can be eliminated, and data analysis can be easily performed.

Furthermore, in addition to displaying parameter trend graphs and digital values at specified times on a display device such as a CRT, it also displays parameter change factors and related equipment operation items at specified times before and after the specified time. Therefore, information regarding trends can be obtained all at once from the same display device.

[Embodiment 1] A first embodiment of the present invention will be described below with reference to the drawings. In Figure 1, PR is an external process, 1 is a process input/output device, 2 is a data reading logic, 3 is a time-series data storage file, 4 is a trend data output conversion logic, 5 is a CRT, 6 is a light bench, and 7 is a Time series data save file, 8 is address time conversion logic, 9 is light pen interrupt analysis logic, 10 is data memory for digital value display, 11 is digital data output conversion logic, 12 is for commanding data collection according to the schedule. Timing generator 13 performs screen display request operation Keyboard 114 displays screen, interrupts (input/output)
15 is an interrupt input processing logic unit that performs interrupt input processing from the process input/output device I; 16 is a display controller that controls plant equipment startup/control;
An event data storage file 17 stores data on stoppages, accidents, etc. (hereinafter referred to as events), which determines the event occurrence time based on the event data recognition number entered from the keyboard (13), and from this occurrence time. A time series data search logic 18 searches for trend data to be displayed, and a trend data switching logic 18 switches the trend display data between current value data and data searched by the time series data search logic (17).

FIG. 2 is a flowchart for explaining the event data search and display process in the first embodiment, and FIG. 3 is a screen illustrating the event data search and display process in the first embodiment. This shows a request screen and a trend display screen.

Next, the operation of the first embodiment will be explained.

The data at each point in the process is sequentially transferred to the external process (PR).
The data is input to the process input/output device (1) and read at regular intervals according to the timing generated by the timing generator (12). These are analog data such as pressure and temperature, and the subsequent processing involves displaying the trend screen as shown in Figure 12 above, indicating the trend graph with a light pen, and displaying the time and digital data at the indicated point. The process of displaying the converted value is the same as before.

Therefore, event data search and display processing that is different from the conventional technology will be described below. The processing flow is the second
As shown in the figure.

The event data is read from the process input/output device (1) by the interrupt input processing logic (15) at the time when the value of the event data changes, and is sequentially stored in the event data storage file (16). As shown in Figure 3, the trend search keyword (
By inputting the event signal recognition number as 32>, the time series data search logic (17) searches the input event signal recognition number and the event data storage file (1
6) Derive the time data (minutes, seconds) in the record that matches the event signal recognition number in . From this time data and the time data (year, month, day, hour) in the first record of the event data storage file (16), the time corresponding to the keyword, ie, the event occurrence time, is obtained. (Step 5
21) Next, search the time series data storage file (3) for time series data for a predetermined amount of time before and after the event occurrence time (4 hours in the example in Figure 3), and save the time series data to the time series data save file (
7). (Step S22) The trend data switching logic (18) selects the time series data to be displayed as a trend from the time series data in the time series data storage file (3) at the timing of inputting the keyword (13A) from the keyboard (13). Perform the process of switching to the data in the data save file (7), pass the time series data to the trend data output conversion logic (4), and display it on the CRT (5). (Step 523) The above processing According to the flow, time series data is searched from the event signal recognition number and trend display is performed.If the same event occurs multiple times, processing is performed to display each time series data in sequence.

In the first embodiment described above, the time series data is searched using the event signal recognition number, but when an event occurs, the comment data corresponding to the event is stored in the event data storage file, and the time series data is searched using the comment button. Good too.

In addition, the displayed trend graph shows the event occurrence time and
It may also include means for displaying a cursor.

[Example] Next, a second example of the present invention will be described with reference to the drawings. In Fig. 4, PR is an external process, 1 is a process input/output device, 2 is a data reading logic, 3 is a time series data storage file, 4 is a trend data output conversion logic, 5 is a CRT, 6 is a light vent, 7 is a time series data save file, 8 is an address time conversion logic, 9 is a light pen interrupt analysis logic, 10 is a data memory for digital value display, 11 is a digital data output conversion logic, and 12 is a command for data collection according to a schedule. 13 is a keyboard that performs screen display request operations, I4 is a display controller that controls screen display and interrupts (input/output), and 15 is an interrupt from the process input/output device (1). Interrupt input processing logic that performs input processing; 16 is an event data storage file; 19 is event data that performs processing to determine which time period data is to be extracted from plant equipment startup, stop, and accident (hereinafter referred to as event) data. 20 is a search logic, a data memory for event data display, and 21 is an event data display output logic.

FIG. 5 is a flowchart for explaining event data display processing in the second embodiment, and FIG. 6 is an exemplary screen diagram of the second embodiment, in which event data is displayed. ) shows a trend graph display screen including

Next, the operation of the second embodiment will be explained.

The data at each point in the process is sequentially transferred to the external process (PR).
The data is input to the process input/output device (1) and read at regular intervals according to the timing generated from the timing generator (12). These are analog data such as pressure and temperature, and for later processing, the
The process of displaying the trend screen as shown in the figure, and the process of specifying the trend graph using the light bar and displaying the time and digital conversion value of the specified point, are the same as before.

Therefore, four aspects of event data display output processing that are different from the conventional technology will be described here. The processing flow is shown in FIG.

The event data is read from the process input/output device (1) by the interrupt input processing logic (15) at the time when the value of the event data changes, and is sequentially stored in the event data storage file (16).

Therefore, by instructing the CRT displaying the trend graph (5) using the light bevel (6), as before,
The light pen interrupt analysis logic (9) is the light pen interrupt analysis logic (9).
) calculates how many minutes ago the current time is.

Based on this calculation result, the time judgment process (
Step 551) is performed to calculate the time instructed by Light Ben and set it in the time table (51) in the event data search logic (19).

Event data search processing from this time (step 552)
), the event data for the specified time before and after is extracted from the event data storage file (16) and is sected into the event data display data memory (20). Next, through event data display output processing (step 553),
Using the event data in the data display data memory (20), a display button on the CRT (5) is created, stored in the RAM (14A) in the display controller (I4), and the trend graph shown in Figure 6 is created. The display screen will appear.

Incidentally, in the second embodiment, event data from the process is displayed, but information such as the start and end of various operation modes when starting and stopping the plant may be calculated from the event data and displayed on the CRT.

It is also possible to specify a time using the light ben, display a cursor on the trend graph, and scroll the event data display according to the movement of the cursor.

[Effects of the Invention] As explained above, according to the present invention, it is possible to search process data that is currently attracting attention, regardless of the past, with a simple operation based on information on events that are the cause of changes in the process data. , reducing the burden of operations management and plant condition analysis work, etc.
Error prevention can be achieved, and plant monitoring can be highly effective.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a CRT display system according to a first embodiment of the present invention, FIG. 2 is a flow diagram for explaining event data search and display processing in the first embodiment, and FIG. FIG. 4 is a block diagram of the second embodiment of the present invention; FIG.
The figure is a processing flow diagram in the second embodiment, FIG. 6 is an exemplary screen diagram of the second embodiment, and FIG. 7 is a conventional CI
Figure 8 is a block diagram of the IIT l-rend display system. Figure 8 is a data structure diagram of the time series data storage file in the above conventional example. Figure 9 is a block diagram of the IIT l-rend display system. FIG. 10 is an explanatory diagram of the light pen indicated coordinates of the trend graph in the conventional example, FIG. 11 is an explanatory diagram of the operation up to digital value display of the trend graph in the conventional example, and FIG. The figure is an explanatory diagram of a trend graph display in the conventional example. (PR) is a process, (1) is a process input/output device, (
5) is a CRT, (6) is a light pen, (13) is a keyboard, (14) is a display controller, (15) is an interrupt input processing logic, 2, (16) is an event data storage file, ( 17) is time series data search logic, and (18) is trend data switching logic. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
-Reward X

Claims (2)

[Claims] (1) A display means that converts time-series data that is collected and updated according to a schedule into a trend graph at the time of request and displays it on a screen, and stores the time-series data at the time of the request as saved data. At the same time,
By specifying any point on the trend graph,
In a CRT trend display system equipped with means for digitally displaying data at the arbitrary point in the saved data on the same screen as the trend graph, information such as operations and accidents can be displayed together with the saved data. A method for storing sequence data and determining the point of operation/accident by specifying information on the operation/accident as a keyword;
A CRT trend display system further comprising means for searching trend graph data for a specified time before and after this point of time and displaying the trend graph. (2) A display means that converts the time series data collected and updated according to the schedule into a trend graph at the time of request and displays it on the screen, and stores the time series data at the time of the request as saved data. At the same time,
By specifying any point on the trend graph,
In a CRT trend display system equipped with means for digitally displaying data at the arbitrary point in the saved data on the same screen as the trend graph, information such as operations and accidents can be displayed together with the saved data. A CRT trend display system characterized by further comprising means for storing as series data, and means for displaying information on the operation, accident, etc. as a message together with the digital display.