JPH07234133A - Trend graph display apparatus - Google Patents

Abstract

PURPOSE:To prevent the loss of data caused by the mistake of an operator by providing a trend data memory means and a display control means. CONSTITUTION:A trend-data memory device 8 collects the data displayed on a trend graph and the definition data concerned defined by trend data definition file 5 on the basis of the memory command due to the direct input to an input device 20 by an operator and the command from an event generator 19 and adds a comment thereto to store the collected data in a trend data memory file 9. When the trend graph is stored, a memory command is applied to the memory device 8 by the key operation on the input device 20 and the event generator 19 and the memory device 8 edits the trend graph data displayed on a CRT screen by a treand graph display control unit 7 to store the same in the file 9. A trend memory graph display device 10 displays the trend data and comment data stored in the file 9 on a CRT 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a trend graph display device used for process monitoring of various plant facilities and the like, and more particularly to display and recording of a trend graph.

[0002]

2. Description of the Related Art Process monitoring of various plant facilities or various devices for research and manufacturing is often carried out by sequentially graphing process data obtained from measuring instruments installed in a plant or the like (trend graph). The process data that is extracted to form a trend graph and corresponds to the measurement time is especially called trend data.

As a trend graph display device, there is a device called a trend recorder in which trend data is directly plotted on a chart paper continuously. However, with the development of computer technology in recent years, there has been an increasing number of devices that store trend data in a data file and then display a trend graph on a display device such as a CRT.

At plant process monitoring sites, there are many opportunities to refer to past trend graphs. However, this trend data file is just a list of time series data. Although it is possible to examine this data over time later, what is required at the plant site is to immediately obtain the necessary data for the ongoing process, to make comparisons and make decisions. However, it is difficult to immediately pick up the process trend focused on by the operator or the process trend at the time of a specific event on the spot with the operator's comment in the conventional device configuration. Is inefficient to detect.

A conventional trend graph display device has, for example, a configuration as shown in FIG. That is, a device 1 for collecting data, a process data processing device 2 for converting the collected data into process data in engineering units, a process database 3 for storing process data, and a process database based on information defined in a trend data definition file 5. The trend data collection device 4 that takes out the necessary information from 3 and creates the trend data file 6, and the trend graph display control device 7 and the CRT 11 that display the trend data file 6 on the CRT 11 according to the operator's request. It is a hard copy device 17 for copying the trend graph as it is on the screen image.

The trend graph display device configured as described above has been conventionally operated as follows. When the operator wants to save the trend graph displayed on the CRT 11, the operator prints the trend graph on the paper 18 by the hard copy device 17.
The operator writes down the necessary information directly on the hard-copy paper 18 of the trend graph. Then, the sheet is shown to another operator to take over or solve the problem. Therefore, the above-mentioned conventional trend graph display device has an advantage that it is excellent in responsiveness and efficiency.

[0007]

However, the conventional method of hard copying required trend graphs onto paper is such that when the hard copy device 17 fails or the hard copy paper runs out, an important trend graph is displayed. There are problems such as not being able to keep it, and the cost of hard copy paper. In addition, note-taking directly to the hardcopy where important trend graphs are left is
The paper becomes dirty, torn, or lost. This is the loss of valuable information assets in the knowledge of process trends.

Further, the hard copy of the trend graph relies on the operator's judgment, and due to the operator's judgment error, the trend graph may not be saved at the time of an important event.

On the other hand, when judging the quality of the current process, a trend graph when a similar phenomenon has occurred in the past,
In contrast to the current trend graph, the past trend graph is a hard copy on paper, while
The current trend graph is displayed on the CRT screen. Therefore, the comparison of these two trend graphs is a work that gives a great deal of pain to the operator, and quick and accurate judgment is difficult with this method.

Further, since only the data on the trend graph display which is heart-copied on the paper is unknown, it is unclear what kind of alarm occurred when the hard copy was made, what kind of operation was performed, and the like. There was insufficient information to analyze the abnormal state of the process.

That is, the conventional method has the advantages of using paper, such as simplicity, responsiveness, and high efficiency, but has drawbacks such as a high risk of data loss, a heavy burden on the operator, and lack of information on stored data. .

The present invention has been made in view of the above circumstances, and maintains the simplicity, responsiveness, and high efficiency of paper use in storing, displaying, comparing, and analyzing trend data at a plant process monitoring site. At the same time, it contributes to prevention of data loss due to paper use or operator error and cost reduction, facilitates comparison of trend graphs, and provides a trend graph display device that provides sufficient information for analysis of abnormal process conditions. The purpose is to

[0013]

To achieve the above object, the present invention provides the following means. (1) In a trend graph display device that collects time-series data for grasping plant process trends, extracts trend data from the collected data, and displays a trend graph on the display means, the trend graph display device displays the trend graph. When a command to save data regarding a trend graph is input, trend data saving means for adding comment memo information to the corresponding data and saving it in memory, and the saved data saved in the memory are selectively taken out and displayed. Display control means for displaying on the means. (2) In a trend graph display device that collects time-series data for grasping a process trend of a plant, extracts trend data from the collected data, and displays a trend graph on a display means, a process state is a predetermined condition. When it is determined from the time-series data that it has reached, the save command output means for issuing a save command for the trend data and the previously entered comment memo information, and the save command for the data related to the trend graph displayed on the display means When input, a first saving function of adding comment memo information to the corresponding data and saving it in the memory, and when a saving command is input from the saving command output means, saves the corresponding data in the memory. And a trend data saving means having a second saving function, The stored data was selectively taken out,
Display control means for displaying on the display means. (3) In the trend graph display device according to (1) or (2) above, the stored data and the trend data are combined,
A data synthesis display control means for editing and displaying a graph on the display means is added. (4) It has a message history storage memory for storing various messages issued according to the operating conditions of the plant, and
Collect time series data to grasp process trends,
In a trend graph display device that extracts trend data from the collected data and displays the trend graph on the display means, when it is determined from the time series data that the process state has reached a predetermined condition, the trend data and the pre-input data are input. When a save command output means for issuing a save command for comment memo information and a save command for data related to the trend graph displayed on the display means are input, the comment memo information is added to the corresponding data and the trend graph is saved. First to save in memory
And a trend data saving means having a second saving function of saving corresponding data in the trend graph saving memory when a save command is input from the save command output means. A message storage means that corresponds to the data stored by the above-mentioned data and extracts a message generated between the start time and the end time of the trend graph from the message history storage memory and stores the message in the message storage memory; From the message storage memory, the saved data stored in the storage memory is selectively retrieved, and the message storage data stored corresponding to the trend graph display control means displayed on the display means and the selectively retrieved storage data is stored in the message storage memory. Message display system for taking out and displaying on the display means And means.

[0014]

When a measuring instrument is installed in a plant, process data obtained from this measuring instrument is taken out as trend data and is displayed as a trend graph on a display means such as a CRT, the device of the present invention is as follows. Act on.

In the trend graph display device having the above-mentioned configuration (1), when the operator intends to save the currently displayed trend graph, a save command is input by an input device such as an operation key. . The trend data storage means is activated in accordance with this storage command. The started trend data storage means stores the comment memo information input by the operator as data relating to the trend graph displayed on the CRT screen (trend data, start time of trend graph, last time, date and time, attribute data of trend graph, etc.). And is stored in a memory such as a hard disk, a magnetic disk, or a magneto-optical disk. With respect to the recorded saved data, the display control means displays a trend graph and comment memo information on the CRT from the saved data selected by the operator.

In the trend graph display device having the structure as described in (2) above, in addition to the operation of the invention described in (1) above, trend data at a specific event can be automatically saved. When the process state reaches a predetermined condition, it is considered that a specific event (or called a predetermined event) has occurred, and whether it has become a specific event is judged from the collected time series data. It The operator inputs the condition of the specific event in advance.

When a specific event occurs, the save command output means activates the trend data save means. The activated trend data saving means adds the comment memo information input by the operator in advance to the information of the trend graph and saves it in the memory of the hard disk, magnetic disk or magneto-optical disk. Thereafter, similar to the above, regarding the recorded saved data, the display control means displays the trend graph and the comment memo information on the CRT from the saved data selected by the operator.

At this time, whether the data saving command is a saving command from an operator's operation key or the like, or a saving command issued automatically by the saving command output means, the saved data is displayed and controlled. It goes without saying that they can be treated in the same way by the means and can be selected in the same row.

In the trend graph display device having the above-mentioned configuration (3), in addition to the functions of the inventions (1) and (2), the data synthesis display control means is selected and the display control is performed. The trend data on the CRT screen displayed by the means is combined and displayed with the trend data of the processes occurring simultaneously. Conversely, the trend data previously saved in the current trend graph is CR
It is also possible to perform composite display on the T screen. This function is effective for judging the quality of the process currently in progress and for analyzing the phenomenon.

In the trend graph display device having the above-mentioned configuration (4), in addition to the actions of the inventions (1) and (2), a process alarm message, an operation message, an operation message, etc. issued by the plant. Display various messages together with. The various messages are stored in the memory that stores the messages, and when a trend data save command is issued, between the start and end times of the specified trend data among the messages stored in this memory. Save all generated messages in correspondence with the saved data of the previous trend data. When redisplaying the saved data of trend data, the corresponding message is also displayed. With the above display function, the situation when the trend data is saved can be grasped, and it is effective for judging the quality of the process, analyzing the phenomenon, analyzing the abnormal state, and the like.

[0021]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows the configuration of a trend graph display device according to the first embodiment of the present invention. In FIG. 1, a device 1 includes a measuring device and a device that controls a process amount. The process data processing device 2 converts the data collected from the device 1 into process data in engineering units, and also performs alarm management processing. The process database 3 stores the process data obtained from the process data processing device 2. The trend data collection device 4 extracts necessary information from the process database 3 based on the information defined in the trend data definition file 5 and creates a trend data file 6. In the trend data definition file 5, a trend group number corresponding to the device 1, a physical quantity range for displaying a trend graph, a time width, etc. are defined. In the trend graph display control device 7, the trend graph corresponding to the trend group designated by the operator is displayed on the CRT 11. The trend data storage device 8 is the definition information defined by the data displayed in the trend graph and the trend data definition file 5 in response to a storage command by an operator's direct input to the input device 20 or a storage command from the event generation device. Are collected, added with the operator's comment, and stored in the trend data storage file 9. The trend storage graph display control device 10 displays the trend data and the comment memo information stored in the trend data storage file 9 on the CRT 11. The event generation device 19 which is a storage command output means is a process database 3
When the process state reaches a predetermined condition from the data of 1., it is considered that a specific event has occurred, and the trend data storage device 8 is instructed to store the trend data.

The operation of the trend graph display device constructed as above will be described. Either operating the save operation key on the input device 20 when saving the trend graph displayed on the CRT screen, or automatically starting the event generating device 19 when it is considered that a specific event has occurred. Accordingly, a save command is given to the trend data saving device 8.

When activated by a direct input instruction from the operator, the trend data storage device 8 follows the process flow shown in FIG. 2 to display the trend graph information displayed on the CRT screen by the trend graph display control device 7. Edit and store in trend data save file 9.

First, in ST1, an input window for inputting a comment is opened on the CRT screen. In ST2, the operator inputs an arbitrary character string using the input device 20.
The content of the character string is, for example, the reason for storing the trend graph, the purpose, the process state determined by the operator, and the like. After inputting the comment memo information, in ST3, the trend data storage device 8 fetches the trend group number, the start time and the end time of the trend graph from the trend graph display control device 7, and the device corresponding to the trend group number from the trend data definition file 5. Capture information. Then S
At T4, all the data from the start time to the end time of the trend data corresponding to the trend group number are fetched from the trend data file 6. Finally, in ST5, the storage date and time which is the current date and time is added to the above information and stored in the trend data storage file 9.

Next, the case where a prespecified event occurs will be described. The event generator 19
When it is determined from the information in the process database 3 that the designated event has occurred, the trend data storage device 8 is activated. At this time, the event generation device 19 adds the inputted trend group number and comment memo information to the trend data storage device 8 corresponding to the event designated in advance. Trend data storage device 8
Is the same procedure as above, based on the added information,
The device information corresponding to the trend data and the trend group number is fetched from the trend data file 6 and the trend data definition file 5, the storage date and time is added, and the data is stored in the trend data storage file 9. Also at this time,
The comment memo information to be added is not limited to the information that is input in advance, and the information that the operator inputs when an event occurs can be added.

Further, in the above-mentioned device, the trend data is taken in from the trend data file 6, but it is also possible to adopt a structure in which the trend data is directly taken in from the trend graph display control device 7.

The saved trend data stored in the trend data save file by the above procedure is redisplayed by the flow shown in FIG. When the operator requests the display of the saved trend data, the trend saved graph display control device 10 is activated. Of the information stored in the trend data storage file 9, the trend storage graph display control device 10 first displays a list of trend group names, input memos, and storage dates and times on the CRT device. The number of lines that can be displayed on one screen of a CRT is determined by the type of CRT. If the list does not end on one screen,
Display over several pages in the form of pagination.
The operator selects the stored trend data to be displayed from the above list. Trend storage graph display control device 10
Displays the stored trend data selected by the operator on the CRT.
Display as trend graph and comment memo information on the screen. A display example at this time is shown in FIG.

According to the present invention, it is not necessary to directly hard copy the trend graph displayed on the CRT screen, unlike the conventional case, because the trend data storing / redisplaying function to which the comment memo information is added as described above is used. In addition to replacing the conventional method, it has the following advantages. That is, it is possible to prevent the loss of important information for knowing the process trend due to stains, tears, or loss of paper. It also prevents the trend graph from being missed when important events occur due to operator error.
Management and storage of trend graphs are simpler and more space-saving than when using hard copy paper.

Further, in the present invention, at the time of an event judged by the operator or an event which is known to be important in advance,
Only the necessary trend data is filed with the operator's comment memo information. Therefore, compared to the method of saving all process data, a trend graph save / redisplay function that is economical, efficient, and has good operability can be added. This is particularly useful in the field where process monitoring and operation are performed in a plant, because prompt judgment is required.

FIG. 5 shows a second embodiment according to the present invention.
In the present embodiment, a trend graph composite display control function is added. FIG. 5 is a block diagram of a trend graph display device to which a composite display function is added, except for the event generation device 19 of the first embodiment. Description of the parts common to FIG. 1 will be omitted, and the added parts will be described.

In the trend graph display device of this embodiment shown in FIG. 5, the trend graph synthesizing device 12 synthesizes the stored trend graph and the current trend data. The operation of the trend graph display device configured as described above will be described.

When the trend graph displayed on the CRT screen is saved, a save command is given to the trend data saving device 8 by operating the save operation key on the input device 20. Hereinafter, the trend graph is saved by the same procedure as in the case of the first embodiment. Next, again, the stored trend graph is redisplayed on the CRT by the same procedure as in the first embodiment.

In this state, a request is made to display the trend data of the same trend group number as the redisplayed trend graph among the currently collected trend data.
At this time, via the trend graph synthesizing device 12, the trend data collected from the measuring device and the trend graph redisplayed on the CRT are synthesized and displayed. This composite screen makes it easy to compare the current trend data with the stored trend data. FIG. 6 shows an example of the composition screen.
In FIG. 6, the solid line is the trend graph corresponding to the current process data, and the broken line is the graph based on the saved trend data. Although the solid line and the broken line are used in the present embodiment, the identification method may be another expression method such as color or mark.

The synthesizing function can be used, for example, as follows. That is, when the process condition is very good, the operator saves the trend graph at that time. Then, when the operator wants to evaluate the quality of the process at a certain time, a composite screen of the trend graph at that time and the trend graph at the time of a good process state is created. From this composite screen, the process status can be grasped instantly. In other words, if the lines on the trend graph are exactly the same, the process is in good condition, and if the lines do not match, it is speculated that there may be a problem with the equipment corresponding to that line. It will be possible.

In the apparatus shown in FIG. 5, the event generator, which is the save command output means, is implemented in a omitted form. However, even if the event generator is added, the same good result can be obtained. Was obtained.

FIG. 7 shows a third embodiment according to the present invention.
In this embodiment, a message saving / display function corresponding to the saved trend graph is added. FIG. 7 is a block diagram of a trend graph display device to which the event generating device 19 is removed from the first embodiment and a message storage / display function is added. Description of the parts common to FIG. 1 will be omitted, and the added parts will be described.

In FIG. 7, the message history file 1
A message history storage memory 3 stores various messages such as a process alarm message, an operation message and an operation message generated from the process data processing device 2. The message storage device 14 takes out the message generated between the start time and the end time of the trend graph from the message history file 13 and stores it in the message storage file 15 which is a message storage memory. The save message display control device 16
The message saved in the message save file 15 is displayed on the CRT screen.

The function of the device having the above structure will be described below. The procedure for activating the trend data storage device 8 and creating the trend data storage file 9 is the same as in the above-described embodiment. At this time, the message storage device 14 is activated and the message storage device 14 is activated.
Adds an index indicating which record in the trend data save file 9 corresponds to the message data extracted from the message history file 13 and stores the message data in the message save file 15.

When the trend save graph display control device 10 is activated and the save trend data to be displayed is selected, the save message display control device 16 retrieves the corresponding message from the message save file 15,
Open and display a window on the CRT11 screen. The trend graph display and the comment memo information display by the trend storage graph display control device 10 are performed in the same manner as in the above-described embodiment.

By displaying a message at the time of saving the trend graph in accordance with the trend graph and the comment memo information, it is useful for analysis of the cause of occurrence of the process abnormality or the correspondence between the operation and the process, or for succeeding work. Can provide information.

Further, in the apparatus of FIG. 7, the event generating device which is the save command output means is implemented in a omitted form, but an event generating device may be added as in the first embodiment. .

Further, the trend graph display device of FIG. 1 is combined with the trend graph synthesis device 12 of FIG. 5, the message history file 13 of FIG. 7, the message storage device 14, the message storage file 15, and the storage message display device 16 in combination. You may.

With such a configuration, all the effects of the first, second and third embodiments can be obtained, and the storage, display, comparison and analysis of trend data can be performed easily and quickly by using paper. Performance, high efficiency, data loss due to paper usage or operator error and cost savings, easy comparison of trend graphs, and sufficient information for analysis of abnormal process conditions A trend graph display device can be realized.

[0044]

As described above in detail, according to the present invention, since the information of the trend graph display can be saved and re-displayed by adding the comment memo information as if the operator took a hard copy, it is possible to use paper. It is possible to prevent the omission or loss of necessary information due to a malfunction of the hard copy device, an operator's misjudgment, etc. Further, it is possible to prevent the loss caused by using the paper. In addition, it can contribute to the cost reduction of the hard copy device.

Further, the current process state can be visually evaluated by superimposing the past trend graph and the current trend graph. Further, by displaying the trend graph and the message at the same time, it is possible to save the trouble of retrieving the message at the relevant time of the trend graph at the time of analysis work such as accident analysis, and to support efficient process analysis. .

In the apparatus of the present invention, not all data including unnecessary information is stored but only really necessary information is stored as a snapshot, so that it is efficient, easy to operate, and highly responsive. , Useful for process monitoring work in the field. In addition, it is easy to manage such as organizing information.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a trend graph display device according to a first embodiment of the present invention.

FIG. 2 is an explanatory view showing the operation of FIG.

FIG. 3 is an explanatory view showing the operation of FIG.

FIG. 4 is an explanatory view showing the operation of FIG.

FIG. 5 is a configuration diagram showing a trend graph display device according to a second embodiment of the present invention.

FIG. 6 is an explanatory view showing the operation of FIG.

FIG. 7 is a configuration diagram showing a trend graph display device according to a third embodiment of the present invention.

FIG. 8 is a configuration diagram showing a conventional technique.

[Explanation of symbols]

1 ... Equipment, 2 ... Process data processing device, 3 ... Process database, 4 ... Trend data collection device, 5 ... Trend data definition file, 6 ... Trend data file, 7 ... Trend graph display control device, 8 ... Trend data storage device , 9 ... Trend data save file, 10
… Trend storage graph display controller, 11… CRT, 1
2 ... Trend graph synthesizing device, 13 ... Message history file, 14 ... Message saving device, 15 ... Message saving file, 16 ... Save message display control device, 1
7 ... Hard copy device, 18 ... Hard copy paper on which trend graph display is copied, 19 ... Event generating device, 20 ... Input device.

Claims (4)

[Claims] 1. A trend graph display device for collecting time series data for grasping a process trend of a plant, extracting trend data from the collected data and displaying a trend graph on a display means, the trend graph display device displaying the trend data on the display means. When a command to save data relating to the trend graph is input, trend data saving means for adding comment memo information to the corresponding data and saving it in memory, and selectively taking out the saved data saved in the memory, A trend graph display device, comprising: display control means for displaying on the display means. 2. A trend graph display device for collecting time-series data for grasping a process trend of a plant, extracting trend data from the collected data, and displaying the trend graph on a display means has a predetermined process state. When it is determined from the time-series data that the conditions have been met, a saving command output means for issuing a saving command for the trend data and the previously entered comment memo information, and saving of the data relating to the trend graph displayed on the display means When a command is input, a first saving function of adding comment memo information to the corresponding data and saving it in the memory, and when a saving command is input from the saving command output means, the corresponding data is stored in the memory. Second to save
A trend graph display device comprising: a trend data storage unit having a storage function of 1. and a display control unit that selectively retrieves the stored data stored in the memory and displays it on the display unit. 3. The trend graph display device according to claim 1 or 2, further comprising data combination display control means for combining saved data and trend data, editing and displaying the result on a display means in a graph. Graph display device. 4. A message history storage memory for storing various messages issued according to the operating conditions of the plant, collecting time-series data for grasping process trends, and collecting trend data from the collected data. In a trend graph display device that takes out and displays a trend graph on the display means, when it is determined from the time series data that the process state has reached a predetermined condition, a saving command for the trend data and the previously entered comment memo information is issued. When a save command output means to be issued and a save command for the data relating to the trend graph displayed on the display means are input, comment memo information is added to the corresponding data and saved in the trend graph save memory. Function and the save command is input from the save command output means. Then, trend data saving means having a second saving function for saving the corresponding data in the trend graph saving memory, and the trend data saving means corresponding to the data saved by the trend data saving means, Message saving means for taking out a message generated between a start time and an end time from the message history saving memory and saving it in the message saving memory; and selectively taking out saved data saved in the trend graph saving memory and displaying the message. A trend graph display control means for displaying on the display means, and a message display control means for displaying on the display means the message storage data stored corresponding to the selectively retrieved storage data from the message storage memory. A trend graph display device characterized in that