JPH1011133A - Method and device for preparing plant monitoring picture and method and device for monitoring plant - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plant monitoring picture preparing device capable of easily preparing a monitoring picture. SOLUTION: A required display format changing area 402 including a graphic (changing element) 401 of which display is to be changed in accordance with plant on-line data is selected from a background picture. A substitutive image to be stuck to the area 402 is prepared by segmenting an image from the area 402 and correcting the segmented image. Data in the areas 402 are utilized as they are for the shape, size and display position of the substitutive image. A condition for displaying each substitutive image is defined on the substitutive image. A part other than the substitutive image in the monitored picture is set up as a fixed element. The display format changing area 15 segmented from the monitoring picture and the segmented part is left as a blank state. The substitutive image can be stuck only at the time of inputting plant on-line data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention facilitates the operation of drawing a plant monitoring screen in which the state of a plant is represented by a fixed figure whose display form such as color and shape does not change, and a change figure whose display form changes. The present invention relates to a plant monitoring apparatus, a plant monitoring screen creation apparatus, and the like, which have improved efficiency and enabled high-speed drawing of a monitoring screen.

[0002]

2. Description of the Related Art A plant state monitoring apparatus displays a monitor screen on a CRT, in which a monitoring target is represented by a graphic, and visually changes the display state of a desired graphic according to the state of the plant. There is something that can be grasped. Examples of this type of plant monitoring apparatus include those described in JP-A-62-271107 and JP-A-62-96205.

Conventionally, a new monitor screen has been created in the following procedure.

(1) Determine monitor screen specifications, change screens, and conditions of change elements.

[0005] (2) Each constituent figure on the screen is classified into a variable element that changes according to the plant state and a fixed element that does not change.

(3) A figure constituting a monitoring screen is actually created on a CRT for each part.

(4) According to the specifications of the monitoring screen determined previously, fixed elements are set to a background image (hereinafter, referred to as “BG image”), and variable elements are set to a foreground image (hereinafter, “F
G image "). In this case, a change specification unique to each figure corresponding to the online information of the plant is assigned to each of the change figures whose colors and shapes change depending on the state of the valves and pumps. Finally, the place where the changed figure of the FG image is to be entered is blanked in advance, and finally the BG image and the FG image are combined to form one monitoring screen.

The updating of the monitoring screen is performed by replacing only the graphic of a desired portion with a new graphic. Update figures are prepared in advance. The graphic replacement is performed after the previous monitoring screen is once separated into a BG image and an FG image. After the replacement with the new figure, the monitoring screen can be updated by combining the updated BG image and FG image.

In Japanese Patent Application Laid-Open Nos. 62-271107 and 62-96205, a detailed information screen is superimposed and displayed on an arbitrary portion of the screen when necessary according to plant monitoring information. Describes how to convey information to However, this technique requires a detail screen created separately from the monitoring screen. Also,
One screen is completed by combining screens created separately.

[0010]

In the prior art described above, when creating a plant monitoring screen, the work of creating a fixed screen and the work of creating a changing screen are performed separately without cooperating with each other. Therefore, the BG image and F
When combining the G images, a figure shift occurred, and an operation for correcting the shift was always involved. Further, when the number of changed graphics becomes complicated and large, the time required for the above-described misalignment correction increases, and it takes a lot of time to create a screen. That is, the prior art is suitable for providing a plant monitoring screen, but the efficiency of the screen creation operation is very poor.

An object of the present invention is to provide a method and apparatus for creating a plant monitoring screen and a plant monitoring apparatus capable of creating a monitoring screen without making the creator aware of the positional relationship between the fixed screen and the changing screen.

[0012]

Means for Solving the Problems The present invention has been made to achieve the above-mentioned object. As a first aspect thereof, the present invention is directed to a structure of a plant by switching an image to be displayed in a predetermined area on a monitor screen. In a plant monitoring device that expresses a state of an element, a display unit having a display surface on which a desired image is displayed, and a background image of the monitoring screen, which is created in advance and displayed on the display surface, includes: A range selection receiving unit that receives a selection of an area (hereinafter, referred to as a “display mode change area”) for switching an image to be displayed according to data indicating a state, and indicates a shape, a size, and a position of the selected display mode change area. Extracting means for extracting information, drawing instruction receiving means for receiving a drawing instruction from a user, and information extracted by the extracting means; Based on the received drawing instruction drawing instruction receiving means, the image shape and size is identical to the display form changing area (hereinafter "Substitution images")
Image creation means for creating, for each of the replacement images, a display condition receiving means for receiving a setting of a condition for displaying the replacement image in the display form change area,
A storage unit that stores the information extracted from the display form change area, the replacement image corresponding to the display form change area, and the display condition set for the replacement image in association with each other, Based on the data indicating the state of the plant, select a replacement image to be displayed in the display mode change area by referring to the display condition at that time, and position the selected replacement image on the display surface specified in the information. And a control means for displaying the information on the display.

[0013] A graphic symbolized from the constituent elements is drawn on the replacement image, the display condition is a time for switching the replacement image, and the control means controls the replacement image in a predetermined order. Alternatively, the display may be performed at intervals specified by the display conditions.

According to a second aspect of the present invention, there is provided a plant for generating the above-mentioned image used in a plant monitoring apparatus for expressing a state of a component of the plant by switching an image to be displayed in a predetermined area on a monitoring screen. In the monitoring screen creation device, display means having a display surface on which a desired image is displayed, and a background image of the monitoring screen, which is created in advance and displayed on the display surface,
Range selection accepting means for accepting selection of an area for switching an image to be displayed according to data indicating the state of the plant (hereinafter, referred to as a "display form change area"); and shape, size, and position of the selected display form change area Extracting means for extracting information indicating the image, a drawing instruction receiving means for receiving a drawing instruction from a user, and a shape and size based on the information extracted by the extracting means and the drawing instruction received by the drawing instruction receiving means. Image creating means for creating an image having the same size as the display form change area (hereinafter referred to as “alternate image”); the information extracted from the display form change area; And a storage unit for storing the replacement image in association with the replacement image.

The extraction means further extracts bitmap image data in the display form change area, and the image creation means includes an image of the bitmap image data extracted by the extraction means on the display surface. Is displayed, and the replacement image is created by accepting the correction of the image.

According to a third aspect of the present invention, there is provided a method for creating an image for a plant monitoring screen in which the state of a component of a plant is expressed by switching an image to be displayed in a predetermined area on the screen. Is selected on a background image created in advance, and the shape and size of the selected display form change area are selected. A plant monitor characterized by creating an image having the same shape and size as the display form change area (hereinafter referred to as “alternate image”) by extracting information indicating A method for creating a screen is provided.

It is preferable that the replacement image is created by extracting bitmap image data in the display mode change area and correcting the bitmap image data.

According to a fourth aspect of the present invention, there is provided a plant monitoring method for expressing a state of a component of a plant by changing a display form of a predetermined area on a monitoring screen.
A plant monitoring method is provided, wherein a display form indicating that the state of the component has not been confirmed is provided.

In the display mode in which the state of the component has been confirmed, a graphic symbolized from the component is drawn in the area, and a display indicating that the state of the component has not been confirmed. In the embodiment, a figure in which the component is symbolized may not be drawn in the area.

In a display form showing a state in which the state of the constituent element has not been confirmed, the area may be filled with the background color of the monitoring screen.

The operation of the first, second and third aspects will be described.

A background image of a monitoring screen created in advance is displayed on the display surface of the display means. The range selection accepting unit accepts the selection of the display mode change area from the user on the background image.

The extracting means extracts information indicating the shape, size, and position of the selected display mode change area. Further, bitmap image data in the display mode change area is extracted.

The image creating means creates a replacement image whose shape and size are the same as the display form change area based on the information extracted by the extracting means and the drawing instruction received by the drawing instruction receiving means. When the extraction means is extracting bitmap image data of the display mode change area, if an image of the bitmap image data is displayed and a correction of the image is accepted, creation of a replacement image is easy. is there.

The display condition receiving means receives, for each of the replacement images, setting of conditions for displaying the replacement image in the display form change area.

The information (shape, size, position) extracted from the display form change area, the replacement image corresponding to the display form change area, and the display condition set for the replacement image are associated with each other. In the storage means.

The control means refers to the display condition based on the data indicating the state of the plant which is input separately,
At that time, a replacement image to be displayed in the display mode change area is selected. Then, the selected replacement image is displayed at the position on the display surface specified in the information.

If the display condition is defined by time, the switching image can be switched at each time to express the movement on the monitoring screen.

The operation of the fourth embodiment will be described.

By providing a display form indicating that the state of the component has not been confirmed, erroneous recognition of the monitoring screen can be prevented. In a display mode indicating a state in which the state of a component has not been confirmed, a symbolized version of the component may not be drawn but may be painted in the background color of the monitoring screen.

[0031]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a system block diagram showing the configuration of the present invention. In FIG. 1, a monitoring screen creation device includes a network control device 106 for capturing online data of a plant, a CRT screen 102 for displaying a monitoring screen, and an auxiliary storage device 105 for storing a change specification of the monitoring screen. And a central processing unit 101 and a keyboard 1 for inputting numerical values, characters, and the like constituting a monitoring screen.
03, a pointing device 104 is provided.

The power plant 109 is provided with various sensors 108 for extracting various state quantities.
The plant online data obtained from the sensor 108 is sequentially transmitted to the monitoring screen creation device via the network 107.

The monitoring screen creation device is used as a monitoring terminal when a plant operator actually displays the state of the plant using the monitoring screen, and replaces the monitoring screen created in accordance with the plant online data with a replacement image of the monitoring screen. It shall be switched and displayed.

FIG. 2 shows an example of the monitoring screen. Monitoring screen 3
01, symbol figures 302, 303, 304, 30
5 is depicted. A symbol figure 305 indicates a pipe through which a fluid flows. The symbol graphic 304 indicates a pump that is a supply source of the fluid flowing in the piping. The symbol graphic 303 indicates a heater for heating the fluid. The symbol graphic 302 indicates an adjusting valve for restricting the flow rate. Symbol graphics 303, 304, 30
5 is drawn on the background image of the monitoring screen, whereas the symbol figure 302 is drawn on an image (alternate image described later) prepared separately from the background image. The monitoring screen 301 is made by combining the background image and the replacement image. When the control valve operates in an actual plant to adjust the flow rate, the switching image in which the symbol graphic 302 is drawn is switched and displayed in accordance with the opening (%). In this case, the symbol figure 302 drawn in each replacement image
By changing the color or the like in accordance with the condition (here, the opening degree of the valve) for displaying the replacement image, the operator can grasp the valve state information.

In this embodiment, an area including a symbol figure whose display form is to be changed in accordance with the state of the plant on the background image created in advance is selected as a display form change area. Then, by extracting and correcting the image of the display form change area, an image to be switched to the display form change area and displayed according to the state of the plant (hereinafter, referred to as a “replacement image”) is created. In this case, the overall shape, size, and display position of the replacement image are the same as those for the display form change area.

The auxiliary storage device 105 stores the replacement image,
A replacement image storage table and a change condition storage table for storing a condition (change specification) for switching the replacement image and the like are stored.

The replacement image storage table stores a plurality of types of replacement images created corresponding to one display mode change area. The replacement images associated with the same display mode change area must have the same size, shape, and display position. Therefore, the replacement image storage table is provided with such information (size, shape, display position) as a header, and the information is shared in each replacement image (see FIG. 5). ). In the present embodiment, the shape of the display mode change area is a rectangle, and the size and the display position are represented by coordinates of diagonal positions of the rectangle.

The change condition storage table stores, for each replacement image, conditions for displaying the replacement image or conditions for switching (change specifications) (see FIG. 5).
Although not clear in FIG. 5, the change condition storage table has a PID indicating which data is stored in the change condition storage table.
(Process Identity) is also stored. The change condition storage table and the replacement image storage table set for the same display mode change area are associated with each other and are treated as one set of information.

The auxiliary storage device 105 also has a B for storing data of a fixed screen portion of the monitoring screen.
A G fixed screen storage table 802 is provided.

The central processing unit 101 controls the above-described units, fetches plant online information,
The display processing of the image data corresponding to them is performed. Screen data generation processing unit 80 in FIG.
1. The BBG loader 808 and the FG loader 809 are realized by the central processing unit 101 executing a program stored in the memory.

Next, a procedure for creating a plant monitoring screen will be described with reference to FIG.

The shaded portion in FIG. 3 is an operation performed by the screen creator. All other blocks are processing automatically performed by the monitoring screen creation device.

The creator creates a background image on the CRT 102 using the pointing device 104 and the keyboard 103 in which all the constituent elements (including both fixed and variable elements) to be displayed on the monitoring screen are drawn. (Work flow 201). The created image is
It is automatically saved as a BG image 804 in the BG fixed screen storage table 802 of the auxiliary storage device 105 (work flow 2
02, see FIG. 6).

Next, the creator selects a display mode change area on the created background image so as to include a symbol figure to be a changing element (work flow 20).
3). The selection is performed using the pointing device 104. The state of the selection is shown in FIG. A symbol graphic 401 indicating an adjustment valve is on a background image created at the time of the work flow 201. Here, in order to make the symbol graphic 401 a variable element that changes according to the state of the plant, the display form change area 402 is selected so as to include the symbol graphic 401. The selection is performed by designating a start point (X1, Y1) and an end point (X2, Y2).

When the selection of the display mode change area is completed, the central processing unit 101 creates a replacement image storage table. That is, the bit map image in the display mode change area is scanned and converted into data. Then, a storage space is set in the auxiliary storage device 105 in accordance with the coordinates of the display form change area, and a replacement image storage table is created in the storage space. In this replacement image storage table,
Information indicating the size, shape, and position of the display form change area is stored together with the bitmap image data in the display form change area (workflows 204 and 205).

Subsequently, the central processing unit 101 creates a change specification allocation window 4 on the CRT 102 in order to create various replacement images to be displayed in the display form change area.
03 is displayed (work flow 206). From now on,
A description will be given along a specific example (FIG. 5). The change specification allocation window 501 receives the setting of an image (alternate image) to be displayed in the display form change area and a condition (change specification) for displaying the alternative image on the monitoring screen, and associates these with each other. It is designed to be displayed. Each column of the change specification allocation window 501 is associated with each column of the above-described replacement image storage table and the change condition storage table.

An image cut out from the display form change area in the above work flow 203 (hereinafter referred to as an “initial replacement image”)
Is the storage location 5 of the replacement image storage table 502.
04. The replacement image display column 505 in the change specification allocation window 501 initially contains
The image stored in the storage location 504 is automatically displayed in exactly the same size and shape as the display form change area according to the coordinate data (work flow 207).

The creation of a new replacement image is performed by modifying the appearance of the initial replacement image using the pointing device 104 and the keyboard 103 in the change specification allocation window 501 (work flow 208). The corrected image is stored again in a predetermined location of the replacement image storage table 502 and is rewritten with the original image (initial replacement image) (work flow 209). Further, on the change specification allocation screen 506, numerical data, which is a change specification indicating a range of predetermined process data, is input via the keyboard 103 (work flow 21).
0). The input change specifications are stored in the change condition storage table 50.
3 (work flow 211). For example, in the example of FIG. 5, a condition that the valve opening is greater than 75% and less than or equal to 100% is set at the uppermost stage. This change specification is stored as a change specification 507 in the change condition storage table 503. The replacement image created to indicate this state is stored in the storage location 504 of the replacement image storage table 502.

Thereafter, similarly, a desired field is selected, a change specification value is input, and a replacement image is created and allocated (work flows 212 to 216). Change specification allocation window 5
Selection of a column to be set in 01 is performed by selecting a desired column with the pointing device 104. In this case, when the replacement image display field is selected, a replacement image (or an initial replacement image) created immediately before is displayed to serve as a basis for image correction (work flow 21).
2). By modifying this image, a new replacement image is created. The created new replacement image is stored again in the replacement image storage table 502. For example, when the replacement image display field 509 is selected by the pointing device 104, the image previously stored in the storage location 504 is read and displayed in the replacement image display field 509. The replacement image created by correcting this is stored in storage location 50
8 is stored. The value set in the change specification setting column 510 is stored in the change condition storage table 503 as a change condition 511.

The replacement image and the conditions for displaying the replacement image are set in the replacement image storage table and the change condition storage table by the above operation and processing. This completes the drawing work.

Each of the alternate images created in this way has a specific shape,
A symbol figure with color is drawn. On the other hand,
Each replacement image created and registered in this way shares data on its shape, size, and display position.
Therefore, even if the replacement image to be displayed in the display form change area is switched, no deviation occurs between the replacement image and the BG.

After the drawing operation is completed, the central processing unit 1
No. 01 creates an initial image (BBG described later) of the monitoring screen. Hereinafter, the creation of the BBG will be described with reference to FIGS. In FIG. 6, the replacement image storage table and the change condition storage table are combined into one and drawn as a replacement image / change condition storage table 803.

The background image data 804 created in the work flow 201 described above is stored in the BG fixed screen storage table 802.

The screen data generator 801 takes in the background image data 804. Further, information 806 indicating the shape and size position of the display mode change area stored in the replacement image / change condition storage table 803 is fetched (work flow 219). The screen data generation unit 801 includes:
In accordance with the acquired information 806, the monitoring screen data 804
, A new fixed screen 805 (double background image, BBG) is generated in which only the display mode change area is cut out and the part where the replacement image is displayed is blank (more precisely, the area is filled with the background color of BG). Then, the generated new BBG 805 is stored in the BG fixed screen storage table 802 (work flow 220). The actual monitoring screen has a configuration in which a replacement image is pasted on the BBG.

Next, the operation of the apparatus during operation will be described with reference to FIGS.
This will be described with reference to FIG.

First, the initial operation (work flow 222 to 224) of this monitoring screen will be described with reference to FIG. When displaying the initial monitoring screen (BBG), the BBG loader 80
8 calls the BBG image 805 (workflows 222 to 222).
223), and displayed as a monitoring screen 811 (work flow 224). At this stage, the plant online information 810
Is not input, the state of the plant cannot be recognized. This unrecognizable state is expressed by blanking the replacement image display area on the monitoring screen. Therefore, the symbol figure drawn in the replacement image always represents the state of the plant. By preventing the replacement image from being displayed in the initial state in which the monitoring terminal does not recognize the plant state, erroneous recognition can be prevented and the reliability in monitoring can be improved.

Subsequently, the FG loader 809 takes in the plant online data 810 and the display position of the replacement image, the replacement image, and the change condition data 807, makes a condition determination, and switches and displays the replacement image group at the designated position on the monitoring screen 811. (Workflows 225 to 230). Hereinafter, the switching display of the replacement image will be described in detail. The state of the plant is automatically detected by various sensors 108 at a predetermined timing, and is appropriately transmitted to the monitoring terminal via the network 107 (work flow 225). FG loader 8
The step 09 compares the transmitted data with the data of the previously defined change condition storage table 803 (work flows 226 to 227). Then, one of the replacement images is selected from the replacement image storage table 803 and displayed according to the result of the comparison (work flows 228 to 23).
0). The display position is set by the pointing device 1 at the time of drawing.
This is the position of the display mode change area selected in step 04, and its coordinate data is stored in the information 806 of the figure storage table 803. For example, in the example of FIG. 8, a replacement image is displayed in the display form change area 604 on the monitoring screen 601. When the actual valve opening is 95%, the FG loader 809 determines that the valve state at that time belongs to the range of the condition 606 of the change condition storage table (larger than 75% and equal to or less than 100%). Then, in accordance with this determination result, the replacement image 607 associated with the condition 606 is called from the graphic storage table 603 and displayed at a specified position on the screen.

Thereafter, by repeating the same processing, when the state of the plant changes, a replacement image showing the state at that time is displayed each time. For example, when the valve opening changes from 95% to 60% in the example of FIG. 8, the state is detected by the various sensors 108 and transmitted to the monitoring terminal via the network 107 in the same manner as described above. Based on the transmitted valve opening data, the FG loader 809 determines that the valve state at that time belongs to the range of the condition 609 (greater than 50% and equal to or less than 75%) in the change condition table. Therefore, the replacement image 610 corresponding to the condition 609 is called and automatically displayed in the display form change area 604. At this time, the replacement image 610 shares information indicating the display position with the replacement image 607 displayed earlier. Therefore, when switching and displaying the replacement image 607 to the replacement image 610, it is not necessary to re-read the position data 605. Therefore, the time required for redrawing is very short.

Thereafter, similarly, the state of the plant is visually represented by switching and displaying the alternate images one after another according to the state of the plant at that time.

Next, an application example of the plant state display using the substitute image will be described with reference to FIG.

In this application example, the alternate image is switched at a predetermined time interval so that the symbol figure drawn in the alternate image appears to be moving. By setting the time interval at which the alternate image is switched according to the value of the data sent from the plant, the speed of the movement is changed according to the value of the data.

In the example of FIG. 9, a symbol figure meaning a pump is drawn in a replacement image 708 switched and displayed on the monitoring screen 701. In order to express the state in which the pump is rotating, the symbol figures drawn in each of the alternate images are drawn with their angles slightly shifted. The change condition storage table 702 stores information that defines the relationship between the pump rotation speed of the plant and the time interval at which the alternate image is switched. By continuously displaying the alternate images repeatedly while switching them sequentially at time intervals according to the rotational speed of the pump, the state of the pump rotating is expressed. That is, a moving image can be added to the monitoring screen.

[0064]

As described above, according to the present invention, the created replacement image can be displayed in the display form change area without causing any positional displacement. Therefore, it is not necessary to correct the positional deviation when combining the background image and the replacement image as in the related art.

Since each of the replacement images shares the position data, redrawing when switching the replacement images can be performed at a very high speed. Furthermore, it is also possible to give a moving image to the monitoring screen. If no data is sent from the plant, the area for displaying the replacement image is left blank, so that there is no possibility that the contents of the monitoring screen will be mistaken.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a monitoring screen creation device according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a monitoring screen.

FIG. 3 is a flowchart showing how a replacement image or the like is created.

FIG. 4 is a diagram illustrating an operation of selecting a display mode change area.

FIG. 5 is a diagram illustrating a method of assigning a change specification to a replacement image using a change specification assignment window.

FIG. 6 is a diagram showing an overall state of actual monitoring screen generation.

FIG. 7 is a flowchart illustrating a process when the plant monitoring device is operated.

FIG. 8 is a diagram illustrating a state in which a replacement image is switched and displayed.

FIG. 9 is a diagram illustrating an example in which a moving image is displayed using a replacement image.

[Explanation of symbols]

 Reference Signs List 101 central processing unit 102 CRT display 103 keyboard 104 pointing device 105 auxiliary storage device 106 network control device 107 network 108 sensor 109 power generation plant 801 screen data generation processing 808 BBG loader 809 FG loader

Claims (9)

[Claims] 1. A plant monitoring device for displaying a state of a component of a plant by switching an image to be displayed in a predetermined area on a monitoring screen, comprising: a display unit having a display surface on which a desired image is displayed; On a background image of the monitoring screen, which is created in advance and displayed on the display surface, a region for switching an image to be displayed according to data indicating a plant state (hereinafter, referred to as a “display mode change region”) is selected. Accepting range selection accepting means, extracting means for extracting information indicating the shape, size, and position of the selected display mode change area; drawing instruction accepting means for accepting a drawing instruction from a user; Based on the extracted information and the drawing instruction received by the drawing instruction receiving means, the shape and size are displayed as described above. Image creation means for creating an image identical to the state change area (hereinafter, “alternate image”); and display condition reception for receiving, for each of the alternate images, a condition for displaying the alternate image in the display form change area. Storage means for storing the information extracted from the display form change area, the replacement image corresponding to the display form change area, and the display condition set in the replacement image in association with each other; Based on the data indicating the state of the plant that is input, by referring to the display conditions, select a replacement image to be displayed in the display form change area at that time, and display the selected replacement image in the display specified in the information. A plant monitoring device, comprising: control means for displaying at a position of a surface. 2. The replacement image, wherein a graphic symbolized from the constituent elements is drawn, the display condition is a time for switching the replacement image, and the control means determines the replacement image in advance. The plant monitoring device according to claim 1, wherein the display is performed in order, at intervals of time specified in the display condition. 3. A plant monitoring screen creating apparatus for creating an image used in a plant monitoring apparatus for expressing a state of a component of a plant by switching an image to be displayed in a predetermined area on the monitoring screen. A display unit having a display surface on which an image is displayed, and an area for switching an image to be displayed according to data indicating a plant state on a background image of the monitoring screen previously created and displayed on the display surface (Hereinafter referred to as “display mode change area”) range selection receiving means for receiving selection, extraction means for extracting information indicating the shape, size, and position of the selected display mode change area, and drawing from a user A drawing instruction receiving unit for receiving an instruction; information extracted by the extracting unit; Image creation means for creating an image whose shape and size are the same as the display mode change area (hereinafter referred to as “alternate image”) based on the digitization instruction, and the information extracted from the display mode change area Storage means for storing the replacement image created with respect to the display mode change area in association with the replacement image. 4. The extraction means further extracts bitmap image data in the display mode change area, and the image creation means includes a bitmap image data extracted by the extraction means on the display surface. The plant monitoring screen creation device according to claim 3, wherein the replacement image is created by displaying the image (1) and accepting the correction of the image. 5. A method for creating an image for a plant monitoring screen, wherein a state of a component of a plant is expressed by switching an image to be displayed in a predetermined area on the screen, wherein the display is performed according to data indicating the state of the plant. The area for changing the form (hereinafter referred to as “display form change area”)
By selecting on the background image created in advance, extracting information indicating the shape and size of the selected display form change area, and using the extracted information, the shape and size are Creating a same image as the display mode change area (hereinafter referred to as “alternate image”). 6. The plant according to claim 5, wherein the generation of the replacement image is performed by extracting bitmap image data in the display mode change area and correcting the bitmap image data. How to create a monitoring screen. 7. A plant monitoring method for expressing a state of a component of a plant by changing a display mode of a predetermined area on a monitoring screen, wherein a display mode indicating that the status of the component has not been confirmed. And a plant monitoring method. 8. In the display mode in which the state of the component has been confirmed, a graphic symbolized from the component is drawn in the area, and a state in which the state of the component has not been confirmed is displayed. 8. The plant monitoring method according to claim 7, wherein in the display form shown, a graphic symbolizing the component is not drawn in the area. 9. The plant monitoring system according to claim 7, wherein, in a display mode showing a status in which the status of the component has not been confirmed, the area is filled with a background color of the monitoring screen. Method.