WO2018087864A1 - Information display device, information display system, and display screen control method - Google Patents

Abstract

Provided is an information display device (100) characterized by being provided with: a storage means (114) having screen information (1000) of screen data for display screens to be displayed on a display device (200) including a production state screen (1010) that indicates a production state of a factory and an external content display screen (1020) that indicates an event content, and schedule information (1100) in which display methods for the production state screen (1010) and the external content display screen (1020) are defined; and a processing unit (112) which receives a value of an external input device (300) that varies depending on the production state of the factory or information from a control apparatus (400) of the factory, and constructs a display screen to be displayed on the display device (200), on the basis of the production state screen (1010) and the external content display screen (1020).

Description

Information display device, information display system, and display screen control method

This invention monitors the state of external input devices such as switches and sensors provided in various control devices and equipment, including programmable logic controllers (hereinafter referred to as PLC (Programmable Logic Controller)) that control production facilities in factories. By collecting the production status of the production facility and the operation status of the facility, the information on the production status collected on the screen of a large display or tablet terminal is displayed, and information such as event information that is arbitrarily defined The present invention relates to an information display device, an information display system, and a display screen control method that display at timing.

By visualizing the production status including parts arrangement, product manufacturing, maintenance, and shipping (visualization of information) in the factory, productivity can be improved due to the effects such as early detection and handling of problems and improvement of worker awareness. Improvement is expected.
In particular, visualization of production results and progress is effective as a means of timely information grasping at production sites, and an apparatus called “ANDON” using an electric bulletin board has already been widely used.
Andon displays numerical information such as production targets and production results, and displays the operating status and abnormal status of each part of the production line with lamps. It is used according to the nature.
In addition to the electronic bulletin board system, an ANDON system that displays information using computer graphics using a personal computer or a dedicated controller has been commercialized.

Among the Andon system, for those that displays the actual results for the production plan, for example, the day before the actual production, planners determine responsible for the factory of production planning, which any line for any number production which products the next day It is necessary to operate according to a production plan such as operating at a timing.
Such a production plan management method is generally operated before the introduction of the ANDON system. When the ANDON system is newly introduced to promote “visualization”, the existing production plan input system is used. Smooth cooperation is required.
For this reason, it is often the case that the system is developed in-house and customized according to the company rather than the commercial ANDON system, but in this case, the development cost is generally higher than when using the commercial product as it is. In particular, companies with limited development budgets can be a barrier to adoption.

Further, there is a demand not only for inputting a production plan but also for displaying information optimized for a production site by customizing the layout and information of a screen to be displayed. In response to these demands, for example, SCADA (Supervisory Control And Data Acquisition), which is often used in large-scale facilities such as chemical plants, displays the collected information in graphs and numerical values in an arbitrary layout. Information displayed by connecting the screen of a programmable display, which is a display operation terminal widely used in general factories, to a large monitor using RGB video signals and displaying the information collected by the programmable display graphically In some cases, it may be easier to customize the design.
For example, Patent Document 1 discloses a technique of using a Web server to distribute and display collected information to a plurality of display terminals.

Patent Document 2 relates to a control system including a client device, and includes a public server unit that can display a unit screen that is different from the unit screen currently displayed on a programmable display, and is currently being displayed from a project file. The display tag related to the unit screen is extracted, and for each display tag, the state of the device related to the display tag is obtained for each display tag, and the graphic of the expression format specified by the display tag is obtained. , Display in the area specified by the display tag on the screen of the display unit, and read out the data indicating the active alarm from the data storage unit, for example, in the form of a character string indicating each alarm A technique for displaying an alarm is disclosed.
Here, it is assumed that a Web browser is mounted on the client device in the public server, and the state of the control device connected to the programmable display is disclosed to the client device through the Web server function, and the client device A mechanism for displaying a screen is disclosed. This technology also shows that information displayed on the client device is dynamically updated based on device information collected by a programmable display serving as a server using an applet.

On the other hand, when graphical information can be displayed on a large screen monitor, etc., not only the production status, but also the information on the bulletin board, such as information on events for the day, can be displayed on the same screen, saving space. It is thought to lead to effective use of infrastructure. As a device that displays only such bulletin board-like information, a so-called “digital signage” product is widely used. In such products, it is common to display while automatically switching a predetermined content at a predetermined time. For example, Patent Literature 3 discloses a technique for displaying live information arbitrarily in addition to predetermined content.

US2004 / 0225955 JP 2004-171282 A JP 2010-45633 A

In the conventional ANDON system, the production plan is input using a dedicated tool, the production results obtained from the production equipment and the comparison with the plan are displayed on a large screen, and the collected production status is a personal computer that serves as a server. The function of collecting and listing the information is disclosed.
However, a layout for information display on a personal computer serving as a server is determined in advance, and it is not assumed that the user will customize it.

Specifically, the technology of Patent Document 1 can divide a layer that collects information from a layer that visualizes it and use Web server technology to collect and display information in an arbitrary layout. For example, presentation of information depending on timing, such as procedure display related to setup change and notification of an event, is not disclosed.

Further, although the technique of Patent Document 2 shows a means for dynamically updating, for example, a graph display on a display screen of a client device, a mechanism for dynamically switching the display screen is not disclosed. .

In addition, in the digital signage system in the technology of Patent Document 3, it is common to perform distribution of content and live images prepared in advance at a predetermined timing. For example, when an abnormality occurs in a production facility, Information presentation means according to the production status of the factory is not considered, such as switching of content according to the progress of production.

In other words, even when the ANDON system is installed in the factory, peripheral devices such as a large screen monitor and a PC for operating the system will be introduced for the purpose of displaying production results and equipment operating status. It has not yet reached a high value-added system that includes the presentation of additional information.

The present invention has been made in view of the above, and in addition to the operating status of production facilities and production results, additional information such as matters to be transmitted to workers on the production site and work instructions according to production progress. An object of the information display system to be provided is to provide an information display system having a degree of freedom in accordance with a user's usage environment.

In order to solve the above-described problems and achieve the object, the present invention is a display screen displayed on a display device, which is a screen of a production status screen representing the production status of a factory and an external content display screen representing event details. Screen information that is data, schedule information in which a display method of the production status screen and the external content display screen is defined, and a value of an external input device that changes depending on the production status of the factory, or A processing unit that receives information from a factory control device and constructs a display screen to be displayed on the display device based on the production status screen and the external content display screen.

With the information display system of the present invention, the addition of an information display system capable of presenting additional information such as items to be communicated to workers on the production site and work instructions according to production progress, in addition to the operating status and production results of production facilities Value can be improved.

1 is a diagram of a configuration of an entire system according to an embodiment of the present invention. The figure of the internal structure of an information display server, and the related apparatus and apparatus of the periphery. The component diagram of content data. The figure which showed the structure of the production state screen set. The figure which showed the structure of the external content screen set. The figure which showed the structure of the steady transition schedule classified by screen set. The figure which showed the structure of production plan information. The figure which showed the example of a display of the production condition containing a manufacturing triangle figure. The figure which showed the example of a display of the production status centering on a numerical value. The figure which showed the example of a display of a production condition including the figure which modeled the whole image of a production facility and showed the operation state of the equipment which comprises a production facility. The figure which showed the example of a display of the history of the alarm of an apparatus, and an event. The figure which showed the operation example of the external content display screen. The figure which showed the example of a display of a visitor notification screen. The figure which showed the example of a display of a setup change screen. The figure which showed the example of operation | movement of content switching. The figure which showed the flow of the process of content switching. The figure which showed the example of the screen and content switching within a screen set. The figure which showed the construction example of the screen according to an information display client.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a diagram showing a configuration of an entire information display system according to an embodiment of the present invention. As shown in the figure, an information display system 1 according to the present invention includes an information display server 100, an information display client 200, The external input device 300 and the control device 400 are connected to the information display server 100.
Also, a content setting device 500 and a screen creation device 600 for making settings for the information display server 100 are prepared.

FIG. 2 is a diagram of an internal configuration of the information display server and related devices / devices in the vicinity thereof. A more detailed configuration of the information display server 100 will be described with reference to FIG.
The information display server 100 includes a communication interface 1 (151) that communicates with a control device 400 such as a PLC that manages the current production results, the number of defective products, the operating status of the apparatus, and alarms from the production facility. A control device communication processing unit 113 including a communication driver that implements a communication protocol for communicating with the communication device.
For a device that does not manage production information by a control device 400 such as a PLC, for example, a signal from an external input device 300 such as a photoelectric sensor that detects a finished product of the production device is received and the number is counted. An external input interface 150 is provided.
Whether to communicate with the control device 400 via the communication interface 1 (151), to connect the external input device 300 via the external input interface 150, or to use both together, the optimum form can be selected depending on the application system. .

The information display server 100 also includes, for example, a function screen program 180 that defines the behavior of the information display server, content data 181 relating to production plans and signage, production data collected by the information display server, log data 182 such as device alarms, and the like. Can be connected to an external storage medium 114 such as a flash memory.
Although the configuration in which the external storage medium 114 is provided in the information display server has been described here, an external storage device or database connected via a network such as Ethernet (registered trademark) may be used.

The internal processing unit 112 interprets various kinds of information of the information display server 100, performs screen display on the LCD 110 with a touch panel and interpretation of operation input through the server display operation processing unit 111, and performs control device communication processing unit 113 and external input. Information is exchanged with various external devices through the device processing unit 117.
Further, the function screen program 180 and the content data 181 stored in the external storage medium 114 are interpreted by the client processing unit 115, and information such as production results and apparatus status obtained from various external devices through the internal processing unit 112, and log data. Based on 182, display screen information 183 to be presented to the information display client 200 is constructed.
The constructed display screen information 183 is distributed to the information display client 200 through the communication interface 2 (152) by the Web server 116 that communicates in the Hyper Text Transfer Protocol (HTTP) format. Here, the communication interface 2 (152) is generally Ethernet (registered trademark).

The display screen information 183 handled by the Web server 116 is described in an HTML (Hyper Text Markup Language) format. In the information display system of the present invention, it is assumed that a mechanism such as HTML5 that can dynamically control the contents of the information display client 200 from the information display server 100 side is provided. If it is, it will not be limited to this.

The communication interface 1 (151) and the communication interface 2 (152) are used not only for communication with the control device 400 and the information display client 200, but also for communication with the content setting device 500 and the screen creation device 600, respectively. .

Here, as the information display server 100, for example, a device provided with a communication driver with a PLC and an external input interface in advance, such as an industrial programmable display, is preferably provided with the above-mentioned various functions as an industrial application. However, the product is not particularly limited as long as it has an equivalent function.

On the other hand, the information display client 200 includes a communication interface for communicating with the information display server, a display screen, an input device such as a touch panel, and a Web browser that interprets and displays client display content distributed by the information display server, for example. It is a device such as a monitor, a tablet-type terminal, or a personal computer, and its form is not particularly limited.
The content setting device 500 is a device for creating and editing content data 181 such as a production plan and a bulletin board, and is a computer device such as a personal computer or a tablet terminal provided with a content editing tool 510.
The screen creation device 600 includes a screen design tool 610 for creating and editing the function screen program 180, and is a computer device such as a personal computer or a tablet terminal.

As shown in FIG. 3, the content data 181 includes a screen information set 1000 that defines a series of screens to be displayed and display contents, and schedule information 1100 that defines a display method and switching timing of each screen.
The screen information set 1000 includes a production status screen set 1010 that displays the operating status and production status of the production facility, and an external content screen set 1020 that is used for notifying workers and other items on the production site of events and communication items. .
The schedule information 1100 includes a screen set-specific steady transition schedule 1110 that defines screen transition conditions for each screen set, production plan information 1120 required for screen display included in the production state screen set, and an external content display screen set. An event schedule 1130 that defines display timing, and an operation time schedule 1140 that is common and regular schedule information in production facilities such as operation time / break time and work shift are included.

FIG. 4 shows the configuration of the production status screen set 1010.
In the production status screen set 1010, for example, a plurality of screens for displaying the work progress status of the product currently being processed and the operating status of the apparatus are defined, and each screen is referred to as a production status monitor screen 1011.
Each production status monitor screen 1011 is associated with the production plan information 1120, log data 182, current production results obtained from the external input device 300 and the control device 400, and the operation status of the apparatus.

FIG. 5 shows the configuration of the external content display screen set 1020.
In the external content display screen set 1020, for example, a plurality of screen templates for transmitting break time event information, work transmission items, and the like are defined, which are referred to as an external content display screen 1021.
External content 1022 such as a still image / moving image / character string is inserted and displayed on the external content display screen 1021 depending on the situation.

FIG. 6 shows the configuration of the steady transition schedule 1110 for each screen set.
The screen set-specific steady transition schedule 1110 is information defining transition conditions of screens for switching the screen display when two or more screens are defined in each screen set. For example, when there are screens A, B,... Ns in the screen set, screen A is 30 seconds later, screen B is 15 seconds later, and screen Ns is the rise of the value of a predetermined device memory of the control device. When a condition such as (change from OFF to ON) is detected in advance, a plurality of screens defined in the screen set are automatically switched sequentially.

FIG. 7 shows the configuration of the production plan information 1120.
In the production plan information 1120, for example, information such as a model name for identifying a product in a certain lot, product information in which the number of productions per lot, standard work time, and the like are defined, a scheduled work start time, and the like are defined. Start conditions and work end conditions are defined. The content of the production plan information is not limited to the above because the index varies depending on the nature of the production facility and the type of industry.

In general, when lot production is performed in a production facility, a production plan is drawn up on the next day or before the start of the next shift, and is input as a plan into a database or the like, and various production instructions are given to workers based on this plan. . In variable-variable production, the plan may be dynamically changed, but here, a production facility in which a production plan is previously prepared and manufactured as described above is assumed.
At this time, the production plan information includes the product model name, the number of lots to be produced, the number of productions per lot, the standard time for product production, the equipment to be used, the worker in charge, the required materials, the scheduled work start time, The scheduled completion time is defined. On the other hand, production performance information includes information such as the number of non-defective / defective products after the start of lot production, elapsed time, work stoppage time, production equipment / device abnormality, remaining number of members, and the like.

The information display server 100 stores the production plan information 1120 in the external storage medium 114. Further, the production result information is acquired by the information display server from the control device 400 such as a PLC that controls the production facility and the external input device 300 such as a sensor.
Based on this information, a screen for displaying information as shown below is prepared. These screens are defined as a function screen program 180, distributed to the information display client 200 through the Web server 116 of the information display server 100, and the information display client displays the contents thereof, for example, for workers on the production site. It is used to convey current production status and instructions on a large screen in a timely manner, and to quickly communicate production status and equipment abnormalities with a tablet terminal etc. to the team leader / line leader who manages the site. These series of screens are referred to herein as “production equipment status display” and are registered in the production status screen set 1010.

FIG. 8 is a screen that displays the planned production value and the current production performance as a graph (manufacturing triangle diagram) and a numerical value. In this example, an apparatus abnormality and event history are further displayed.
FIG. 9 is an example of a screen showing the difference between the actual production and the plan only with larger numerical values.
FIG. 10 is an example of a screen with a diagram schematically showing an overall image of a production facility composed of a plurality of devices and cells, and showing and distinguishing the operating status and abnormal status of each element by hatching or the like.
FIG. 11 is an example of a screen that displays a history of events such as device abnormality, warning, and operation start.

In the information display system according to the present invention, in addition to information on production plans and results as shown in FIGS. 8 and 9, instruction information and notification information for various workers working at the production site as shown in FIGS. It has an external content display function that displays it at a timing independent of production results.
The content displayed by the external content display function can take any form that can be supported by the information display client, such as character information, images, and moving images.
In addition, as a content to be displayed in one event, it has a plurality of sub contents, and these are continuously switched and displayed. The external content display screen set 1020 displayed as external content will be described below.

The external content display screen set 1020 defines the following series of screens on which external content 1022 as shown in FIG. 12 can be inserted and displayed.
A content composition result screen is displayed by inserting external content such as an image file into a template screen.
In FIG. 12, a clock is displayed on the upper right of the template screen, and image type content prepared as an external file is synthesized there. However, menu buttons and other typical information may be arranged on the template. Is possible. The image-type content is not limited to a still image, and can be a moving image file or character string information.

The information display system normally displays one of the screens of the production state display screen set 1010, but when a predetermined condition is satisfied, the display is switched to the external content screen set 1020 corresponding to the condition. This switching condition is set as an event schedule 1130 that is a part of the content data 181 and is recorded in the external storage medium 114 of the information display server 100.

As an example of the display switching condition to the external content screen set defined in the event schedule 1130, the following condition is given, and the display is switched when the condition is satisfied.
Rise: When a bit value of a predetermined device memory such as a PLC or a contact value of an external input interface changes from OFF to ON.
Falling: When the bit value of a predetermined device memory such as PLC or the contact value of the external input interface changes from ON to OFF.
Time: When the current time is a predetermined time.
Fixed period: When the specified time has elapsed. For example, when 1 hour is set, the condition is satisfied every hour.
Range: When a value of a predetermined device memory such as a PLC or a value such as a production record obtained and counted from the external input interface reaches a predetermined value.

For example, the rise and fall can be used for notification of occurrence of an unexpected operation such as an alarm occurrence or an emergency evacuation when the occurrence timing of an event is not specified.
The time can be used to display events for which the time can be defined in advance, such as information on break times and notification of visits to factory visitors.
The fixed period can be used for regularly alerting workers.
The range can be used, for example, for a setup change instruction for starting the next setup when the production performance is less than the plan, or for a notification of member replenishment preparation when the stock of the member is reduced.

Examples of applications of the external content display screen set 1020 include the following screens.
Event notification screen:
Displays information such as information on well-being events during breaks.
When there are a plurality of communication items / communication items, a plurality of sub contents are prepared, and these are continuously switched and displayed at predetermined intervals.
Visitor schedule screen (see Figure 13):
Display regular events that require alerts to workers, such as plant visits. Since it is only necessary to prepare a predetermined form and replace the scheduled visit time and visitor name, editing of the content becomes easier compared to the event notification screen.
Setup change screen (see Fig. 14):
Display work setup instructions. Notifies parts required for setup change, devices to be prepared, and settings. On the large screen, an overview of the setup change can be notified, and detailed information can be notified by each person in charge using a tablet terminal or the like.

FIG. 15 shows an operation example of switching each screen set.
In this example, the production of the product 1 is started at 08:30, and at that time, the production state display screen set 1010 is used to display information regarding the production of the product 1 and the equipment.
Similarly, information about product 2 is displayed from 10:45, and information about product 3 is displayed from 14:30.
On the other hand, the working time schedule 1140 is set with break times from 10:00 to 10:20, 12:00 to 12:45, and 15:00 to 15:20, during which the progress of the production plan is stopped.

Further, for example, a factory visitor is scheduled to visit as an event 1 at 09:30, and at that timing, the visitor schedule screen of the external content screen set 1020 is displayed for a certain period of time.
At 12:20, another event 2 is displayed, which is a guide for a product sales promotion on the premises.
Also, a sudden device failure (event (failure)) occurs at 13:55, and a work instruction for responding to the failure is displayed.
In addition, a setup change screen defined as an external content screen set is displayed at a predetermined timing before switching the manufacturing object to the product 2 and the product 3, respectively, and the work shift to the next product is promoted.

In the event schedule 1130 for displaying the external content screen set 1020, priority is set for each event as shown in FIG.
As shown in FIG. 16, the information display server 100 periodically determines event conditions based on the event schedule 1130 (S001). When the occurrence of an event is detected (S002), the screen set of the event with the highest priority among the events that are occurring is set as a display target (S003).
On the other hand, if the event is not occurring, the production plan information, the currently produced product and the production status are acquired (S004), and the screen of the production status screen set 1010 corresponding to the information is displayed (S005).

Also, as shown in FIG. 17, external files such as a plurality of screens included in each screen set and image type content to a template screen in the external content screen set can be automatically switched, for example, in a fixed time.
The conditions for switching include those equivalent to the display switching conditions for the external content screen set defined in the event schedule 1130.

By the way, the screen distributed by the information display server 100 to the information display client 200 can be prepared according to the form of the information display client 200.
For example, as shown in FIG. 18, a screen (large monitor screen) displayed on a large monitor for workers on the production site and a tablet terminal screen carried by the team leader or line leader to check each time are prepared. A screen corresponding to each can be presented.
Such additional information is displayed not only on a large screen, but also on a portable terminal device such as a tablet terminal or a personal computer in an office, so that information can be presented more timely to, for example, on-site managers and maintenance personnel. Higher productivity improvement can be expected.

The information display system configured in this way is ideal for workers working at production sites, team leaders who manage them, line leaders, and managers and managers who understand the production status of the entire factory. Thus, additional information such as production status and related events can be presented. This timely and effective presentation of information can be expected to speed up the handling of troubles and improve the production efficiency by raising the awareness of workers, resulting in an improvement in productivity.
In other words, in the factory production site, grasping the current production performance in a timely manner by the ANDON system is expected to lead to an increase in work efficiency due to effects such as raising awareness of the target for the worker.
On the other hand, if the situation when a trouble occurs in the facility can be communicated, it will lead to a reduction in downtime and an improvement in productivity. Furthermore, by appropriately notifying the timing of switching (setting change) of the product to be produced, the set-up can be started at an appropriate timing, smooth changeover can be performed, and the line operating rate can be increased.

DESCRIPTION OF SYMBOLS 1 Information display system, 100 Information display server, 110 LCD with a touch panel, 111 Server display operation processing part, 112 Internal processing part, 113 Control apparatus communication processing part, 114 External storage medium, 115 Client processing part, 116 Web server, 117 External input device processing unit, 150 external input interface, 151 communication interface 1, 152 communication interface 2, 180 function screen program, 181 content data, 182 log data, 183 display screen information, 200 information display client, 201 Web browser, 300 external Input device (sensor, etc.), 400 control device (PLC, etc.), 500 content setting device, 510 content editing tool, 600 screen creation device, 610 screen Total tool, 1000 screen information set, 1010 production status screen set, 1020 external content display screen set, 1021 external content display screen, 1022 external content, 1100 schedule information, 1110 regular transition schedule by screen set, 1120 production plan information, 1130 event Schedule, 1140 Operating time schedule.

Claims (14)

A display screen to be displayed on the display device, the screen information which is the screen data of the production status screen representing the production status of the factory and the external content display screen representing the event content;
Schedule information in which a display method of the production status screen and the external content display screen is defined;
Storage means having
Accepts the value of an external input device that changes depending on the production state of the factory or information from the control device of the factory, and constructs a display screen to be displayed on the display device based on the production state screen and the external content display screen A processing unit;
An information display device comprising: 2. The information display according to claim 1, wherein the processing unit has an information display server function for distributing a display screen constructed from the production status screen and the external content display screen to a display device connected via a network. apparatus. 3. The storage means is provided with a display screen constructed from a production status screen corresponding to a plurality of display devices and an external content display screen, and distributed to each display device by an information display server function. The information display device described in 1. The information display server function includes a Web server that communicates in HTTP format, and distributes a display screen constructed from a production status screen and an external content display screen to each display device in HTML format. Information display device. The information display device according to claim 1, wherein the display screen constructed by the processing unit is a display screen in which the production status screen and the external content display screen are synthesized with predetermined contents. A display device for displaying a production status screen showing the production status of the factory;
In an information display system comprising an information display device that distributes a screen to be displayed as display screen data to the display device,
The information display device is a display screen to be displayed on the display device, and includes screen information which is screen data of a production state screen representing a production state of a factory and an external content display screen representing event contents, and the production state screen. And the schedule information in which the display method of the external content display screen is defined in the storage means,
Accepts the value of the external input device that changes depending on the production state of the factory or information from the control device of the factory, and processes display screen data to be displayed on the display device based on the production state screen and the external content display screen An information display system that is constructed in a department. 7. The information display according to claim 6, wherein the processing unit has an information display server function for distributing a display screen constructed from the production status screen and the external content display screen to a display device connected via a network. system. 8. The storage means is provided with a display screen constructed from a production status screen corresponding to a plurality of display devices and an external content display screen, and distributed to each display device by an information display server function. Information display system described in 1. 9. The information display server function includes a Web server that communicates in HTTP format, and distributes a display screen constructed from a production status screen and an external content display screen to each display device in HTML format. Information display system. The information display system according to claim 6, wherein the display screen constructed by the processing unit is a display screen in which the production status screen and the external content display screen are synthesized with predefined contents. In a display screen control method for a display device that delivers a production status screen representing the production status of a factory,
A value of an external input device that changes depending on the production state of the factory, or a step of receiving information from a control device of the factory;
The information received in the process is compared with the schedule information set in advance, and when the conditions are met, display is performed based on the production status screen and the external content display screen as display screen data for display on the display device. The process of building the screen;
Delivering display screen data to the display device;
A display screen control method characterized by comprising: The display screen control method according to claim 11, wherein the step of distributing the display screen data is distributed to a display device connected via a network. The display screen control method according to claim 12, wherein the step of distributing the display screen data distributes the constructed display screen data to each display device by using a Web server function for communication in HTTP format. 7. The display screen control according to claim 6, wherein the step of constructing the display screen constructs the display screen so that the production state screen and the external content display screen are combined with a predefined content. Method.

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