JP2021043783A - Wireless communication device and monitoring application program - Google Patents

Abstract

To provide a wireless communication device that enables an attendant to have access to monitored information about an apparatus, collected by controller in a control system.SOLUTION: A wireless communication device 14, which can be wirelessly connected to a wired communication network 5 in a control system 1 comprising: controllers 13a, 13n that control an apparatus; and a computer device 11 that manages the controller, comprises: a monitoring information acquisition unit that acquires monitored information, which is monitored information about the apparatus, from the controller; a configuration information acquisition unit that acquires configuration information, which is information including identification information and connection relation information about the apparatus from the controller or the computer device; and a display control unit that, on the basis of the configuration information and an operation input by a user, selects a display item from the monitored information and causes a display unit to display the display item.SELECTED DRAWING: Figure 1

Description

Embodiments of the present invention relate to wireless communication devices and surveillance application programs.

Conventionally, in a control system such as an industrial plant (hereinafter, simply referred to as "plant"), a controller such as a PLC (Programmable Logic Controller) has been used to control equipment (various devices and sensors constituting the plant). ing.

Computer devices such as server devices and client devices are connected to such controllers by wire. Then, the clerk can see the monitoring information of the device collected by the controller by using the computer device. In addition, the staff may, for example, visually check the operation of the device under the controller and then use the computer device to see the monitoring information corresponding to the device.

Japanese Patent No. 4852070 Japanese Patent No. 5774450 Japanese Patent No. 6383240

However, in the above-mentioned conventional technique, for example, when the device and the computer device are far apart, there is a problem that it takes time and effort for the staff member to visually check the operation of the device and then view the monitoring information using the computer device. ..

Therefore, it is an object of the present embodiment of the present invention to provide a wireless communication device and a monitoring application program that enable a person in charge to easily view the monitoring information of the device collected by the controller.

The wireless communication device of the embodiment is a wireless communication device that can be wirelessly connected to a wired communication network in a control system including a controller that controls a device and a computer device that manages the controller. A configuration in which a monitoring information acquisition unit that acquires monitoring information that is information to be monitored related to a device and configuration information that is information including identification information and connection-related information related to the device are acquired from either the controller or the computer device. It includes an information acquisition unit and a display control unit that selects display items from the monitoring information based on the configuration information and operation input by the user and displays them on the display unit.

FIG. 1 is an overall configuration diagram showing a control system and the like according to the first embodiment. FIG. 2 is a block diagram showing a functional configuration of the server device of the first embodiment. FIG. 3 is a block diagram showing a functional configuration of the client device of the first embodiment. FIG. 4 is a block diagram showing a functional configuration of the controller of the first embodiment. FIG. 5 is a block diagram showing a functional configuration of the wireless communication device of the first embodiment. FIG. 6 is a diagram showing an example of configuration information of the control system according to the first embodiment. FIG. 7 is a diagram showing an example of a system monitoring screen. FIG. 8 is a diagram showing an example of a system view (I / O node state) screen. FIG. 9 is a diagram showing an example of a system view (I / O module state) screen. FIG. 10 is a diagram showing an example of an I / O loop detailed alarm screen. FIG. 11 is a diagram showing an example of a system log screen. FIG. 12 is a diagram showing an example of a serial I / O log screen. FIG. 13 is a diagram showing an example of a LAN management information screen. FIG. 14 is a diagram showing an example of a detailed screen for each node. FIG. 15 is a diagram showing a part of an example of the system registration screen. FIG. 16 is a diagram showing an example of a screen for saving the state of the engineering tool. FIG. 17 is a diagram showing an example of a RAS diagnosis result screen. FIG. 18 is a diagram showing an acquisition route of configuration information and RAS information by the wireless communication device in the first embodiment. FIG. 19 is a flowchart showing processing by the wireless communication device of the first embodiment. FIG. 20 is a diagram showing an acquisition route of configuration information and RAS information by the wireless communication device in the second embodiment. FIG. 21 is a diagram showing an acquisition route of configuration information and RAS information by the wireless communication device in the third embodiment. FIG. 22 is an overall configuration diagram showing a control system of the prior art.

Hereinafter, the first to third embodiments of the present invention will be described with reference to the drawings. First, in order to facilitate understanding of the present embodiment, the prior art will be described in detail again. FIG. 22 is an overall configuration diagram showing a control system of the prior art. The control system includes a server device, a plurality of client devices, and a plurality of controllers (PLCs) in the plant.

A system programmer creates an application program for a controller (hereinafter, also referred to as a "control program") for automatically operating a plant in a server device or the like, and performs a combination test (system test) and on-site adjustment.

In addition, the system programmer debugs the control program during combination tests and field adjustments in order to safely control the plant. The controller executes a control program and controls the operation of various devices according to the procedure defined by the control program. The control program executed by the controller is described in a language such as SFC (Sequential Function Chart) defined by IEC (International Electrotechnical Commission) 61131-3. Further, the engineering tool or the like in the server device or the like converts the control program described in the SFC or the like into an object file, so that the control program can be executed by the controller.

Further, for example, the system programmer may visually check the operation of the device under the controller and then use the server device or the client device to see the monitoring information corresponding to the device. In addition, the system programmer may change the value of a variable in the control program using a server device or a client device, introduce the control program into the controller, and visually check the operation of the device again.

In such a situation, for example, when the device is far from the server device or the client device, there is a problem that the work by the system programmer takes time and effort.

Therefore, in the following, a wireless communication device and a monitoring application program that enable a staff member to easily view the monitoring information of the device collected by the controller will be described.

(First Embodiment)
FIG. 1 is an overall configuration diagram showing a control system 1 and the like according to the first embodiment. As shown in FIG. 1, the control system 1 includes a server device 11 (computer device), client devices 12a to 12n (computer device), and controllers (PLC) 13a to 13n. Hereinafter, when the client devices 12a to 12n are not particularly distinguished, they are simply referred to as "client device 12". Further, when the controllers 13a to 13n are not particularly distinguished, they are simply referred to as "controller 13". The server device 11, the client device 12, and the controller 13 are installed in the plant. Further, a wireless communication device 14 and a router 15 are provided outside the control system 1. The router 15 is connected to the local network 5.

The server device 11, the client device 12, and the controller 13 are connected to the local network 5. The local network 5 is, for example, a network conforming to a standard such as Ethernet (registered trademark).

FIG. 2 is a block diagram showing a functional configuration of the server device 11 of the first embodiment. The server device 11 includes a processing unit 111, a storage unit 112, an input unit 113, a display unit 114, and a communication unit 115.

The storage unit 112 is realized by, for example, a RAM (Random Access Memory), a ROM (Read Only Memory), an HDD (Hard Disk Drive), or the like, and stores various information such as a source file, an object file, and configuration information.

The source file is a file in which the application program (control program) before compilation is described. The control program of this embodiment is described by, for example, SFC (Sequential Function Chart) defined as a program language for a controller in the standard of IEC (International Electrotechnical Commission) 61131-3.

The object file is a file in which the source file of the control program is converted into an executable program by the compiler unit 1112 and the object generation unit 1113, which will be described later.

The configuration information is definition information including identification information and connection-related information regarding each device in the control system 1. This configuration information also includes configuration information of the devices under each controller 13.

The processing unit 111 is realized by, for example, a CPU (Central Processing Unit) or the like, and includes a display control unit 1111, a compiler unit 1112, an object generation unit 1113, and a transmission / reception control unit 1114.

The display control unit 1111 displays on the display unit 114 based on various information stored in the storage unit 112. For example, the display control unit 1111 displays an edit screen for editing the control program on the display unit 114. The system programmer edits the control program using this edit screen.

The compiler unit 1112 determines whether the grammar is correct or incorrect in the control program described as the source file.

The object generation unit 1113 converts the control program into binary machine language based on the determination result of the compiler unit 1112, and generates an object file. The compiler unit 1112 and the object generation unit 1113 may be realized as an integrated functional unit.

The transmission / reception control unit 1114 controls transmission / reception of information with an external device. For example, the transmission / reception control unit 1114 transmits (downloads) the object file stored in the storage unit 112 to the controller 13.

The input unit 113 is a means for inputting information, for example, a keyboard, a mouse, or a touch panel.

The display unit 114 is a means for displaying information, for example, an LCD (Liquid Crystal Display).

The communication unit 115 is a communication interface for communicating with an external device.

The server device 11 configured in this way collects and stores RAS (Reliability, Availability, Serviceability) information (an example of monitoring information which is information to be monitored regarding the device) from the controller 13, for example. Further, the server device 11 can realize the function of a so-called engineering tool.

FIG. 3 is a block diagram showing a functional configuration of the client device 12 of the first embodiment. The client device 12 is a computer device for acting as a function of the server device 11 and managing (controlling, monitoring, etc.) the controller 13. In the example shown in FIG. 1, the client device 12 and the controller 13 are associated with each other in a one-to-one relationship, but the present invention is not limited to this, and one client device 12 manages a plurality of controllers 13. It may be a thing.

The client device 12 includes a processing unit 121, a storage unit 122, an input unit 123, a display unit 124, and a communication unit 125.

The storage unit 122 is realized by, for example, a RAM, a ROM, an HDD, or the like, and stores various information such as source files, object files, configuration information, controller management information including RAS information (log information, error information, test result information, etc.). Remember.

The processing unit 121 is realized by, for example, a CPU or the like, and includes a display control unit 1211, a compiler unit 1212, an object generation unit 1213, a transmission / reception control unit 1214, and a controller management unit 1215. The display control unit 1211 to the transmission / reception control unit 1214 are the same as the display control unit 1111 to the transmission / reception control unit 1114 of the server device 11 of FIG.

The controller management unit 1215 collects the above-mentioned controller management information from the controller 13 and stores it in the storage unit 122 as the controller management information.

The input units 123 to the communication unit 125 are the same as the input units 113 to the communication unit 115 of the server device 11 of FIG.

FIG. 4 is a block diagram showing a functional configuration of the controller 13 of the first embodiment. As shown in FIG. 4, the controller 13 includes a standard processing unit 131 and a storage unit 132.

The storage unit 132 is realized by, for example, a flash memory or the like, and stores data, a code, configuration information, and RAS information.

The execution-type program described in the object file received from the server device 11 is stored in the storage unit 132 separately as data and a code. The data is the configuration information of the controller 13 described in the object file, the values of the parameters used in the control program, and the like. The code is the code of the control program described in the object file.

The configuration information is definition information of the configuration of the device under the controller 13. The RAS information is information about the RAS collected from the devices under the controller 13. The controller 13 collects and accumulates RAS information at any time.

The standard processing unit 131 includes an object loading unit 1311, a program execution processing unit 1312, and an input / output processing unit 1313.

The object loading unit 1311 receives (downloads) an object file from the server device 11, divides it into data and a code, and stores the object file in the storage unit 132.

The program execution processing unit 1312 reads the data and the code stored in the storage unit 132 and executes the control program. Further, the program execution processing unit 1312 receives feedback from various devices and sensors constituting the plant to be controlled by the process signal or the like received by the input / output processing unit 1313. Further, the program execution processing unit 1312 sets the parameters of the control program based on the feedback.

The input / output processing unit 1313 receives the process signals transmitted from various devices and sensors constituting the plant to be controlled and gives them to the control program.

FIG. 5 is a block diagram showing a functional configuration of the wireless communication device 14 of the first embodiment. The wireless communication device 14 is a device capable of wirelessly connecting to a wired communication network (local network 5) in the control system 1 via a router 15, and is, for example, a tablet terminal.

The wireless communication device 14 includes a processing unit 141, a storage unit 142, an input unit 143, a display unit 144, and a communication unit 145.

The storage unit 142 stores a monitoring application (monitoring application program), configuration information, and RAS information.

The monitoring application is an application program for monitoring the controller 13 created for the wireless communication device 14. An example of the screen displayed by this monitoring application will be described later with reference to FIGS. 7 to 17.

The processing unit 141 includes a display control unit 1411, an acquisition unit 1412 (monitoring information acquisition unit, configuration information acquisition unit), and a transmission / reception control unit 1413.

The display control unit 1411 displays on the display unit 144 based on various information stored in the storage unit 142. For example, the display control unit 1411 selects a display item from the RAS information based on the configuration information and the operation input by the user and displays it on the display unit 144.

The acquisition unit 1412 acquires various information from the external device. For example, the acquisition unit 1412 acquires the monitoring information of the device from the controller 13. Further, for example, the acquisition unit 1412 acquires configuration information from the server device 11. In that case, for example, the acquisition unit 1412 acquires the configuration information after being given the authority to acquire the configuration information from the server device 11.

The transmission / reception control unit 1413 controls transmission / reception of information with an external device.

The input unit 143 is a means for inputting information, for example, a touch panel.

The display unit 144 is a means for displaying information, and is, for example, an organic EL (Electro-Luminescence) display device.

The communication unit 145 is a communication interface for communicating with an external device.

When the wireless communication device 14 communicates with the server device 11, the client device 12, and the controller 13 via the router 15, the IP (Internet Protocol) address of the connection destination device is specified.

FIG. 6 is a diagram showing an example of configuration information of the control system 1 according to the first embodiment. As shown in FIG. 6, the configuration information includes definitions such as the number of I / O nodes under the controller 13 and the module configuration. The I / O node is an interface for the controller 13 to input / output signals to / from an external device. In the example shown in FIG. 6, the unit “00 (BU816)” indicates the controller 13. Although FIG. 6 shows the system configuration of one controller 13 as an example, the configuration information actually includes the definition information of the configuration of all the controllers 13 included in the control system 1.

Hereinafter, an example of a screen displayed by the monitoring application in the wireless communication device 14 will be described with reference to FIGS. 7 to 17.

FIG. 7 is a diagram showing an example of a system monitoring screen. On this system monitoring screen, regarding [Station1] (Fig. 6), each of the main module type, alarm status, operation mode, I / O loop configuration, I / O, and Hub / drive for each main slot number of the controller 13. Information is displayed. Further, at the bottom of the screen, buttons for "system status", "open detail screen", "open system log", "I / O loop configuration", and "I / O node status" are arranged. Of these, for example, when the "I / O node state" button is operated, the screen transitions to the system view (I / O node state) screen shown in FIG.

FIG. 8 is a diagram showing an example of a system view (I / O node state) screen. On this system view (I / O node status) screen, information on the main slot No., I / O node No., I / O node type, alarm status, operation mode, and I / O status is displayed. Further, at the bottom of the screen, buttons for "system state", "station state", and "I / O module state" are arranged. Of these, for example, when the "I / O module state" button is operated, the screen transitions to the system view (I / O module state) screen of FIG.

FIG. 9 is a diagram showing an example of a system view (I / O module state) screen. On this system view (I / O module status) screen, information on the main slot No., I / O node No., unit No., slot No., I / O module type, and alarm status is displayed. Further, at the bottom of the screen, buttons for "system state", "station state", and "I / O node state" are arranged.

Further, when the "I / O loop configuration" button is operated on the system monitoring screen of FIG. 7, the screen transitions to the I / O loop detailed alarm screen of FIG.

FIG. 10 is a diagram showing an example of an I / O loop detailed alarm screen. On this I / O loop detailed alarm screen, the alarm status is displayed for loop A and loop B with respect to the module [00: PU811] (FIG. 6).

Further, when "system log" is selected from the "tool" on the upper left of the system monitoring screen of FIG. 7, the screen transitions to the system log screen of FIG.

FIG. 11 is a diagram showing an example of a system log screen. On this system log screen, regarding the module [00: PU811] (Fig. 6), each information of classification, level, and content is displayed for each date / time (log No.). The content to be displayed can be selected by checking "Error", "Event", and "Transmission" on the screen. In addition, the display order can be selected by "date order" and "log order" on the screen.

Further, when "serial I / O log" is selected from the "tool" on the upper left of the system monitoring screen of FIG. 7, the screen transitions to the serial I / O log screen of FIG.

FIG. 12 is a diagram showing an example of a serial I / O log screen. On this serial I / O log screen, regarding [Station1] (Fig. 6), the "Main slot No.", "Bus No.", "Unit No.", "Slot No.", and "Log display" on the right side are displayed. The serial I / O log is displayed for the content selected in each item. In the "log display", for example, in addition to the displayed "controller side serial bus RAS information", for example, "log type", "all information", "SBIF serial bus RAS information", "SBIF I /" "O-bus error counter", "I / O bus error counter", "SBIF duplex switching information", "I / O module log", "I / O module failure information", "I / O version & serial number", " "Tag information" and the like can be selected.

Further, when "LAN management information" is selected from the "tool" on the upper left of the system monitoring screen of FIG. 7, the screen transitions to the LAN management information screen of FIG.

FIG. 13 is a diagram showing an example of a LAN management information screen. On this LAN management information screen, LAN management information under the "station name" is displayed for each node number. In addition, on the right side of the screen, "File save", "History save", "Details", and "MKB information" buttons are arranged. Of these, for example. When the "Details" button is operated, the screen changes to the node-specific details screen shown in FIG.

FIG. 14 is a diagram showing an example of a detailed screen for each node. On this node-specific detail screen, each information below the MAC (Media Access Control) address is displayed for each node. In addition, a "file save" button is arranged on the right side of the screen.

In FIG. 14, "FECD", "BA98", "7654", "3210" and "0" and "1" below them indicate the contents of an error or the like in bits. This makes it possible to know details such as errors. Specifically, each bit and its corresponding contents are as follows (bits in "").

"0": Normal completion of A system reception "1": No A system reception carrier "2": A system reception carrier cracked "3": No A system reception frame start delimiter "4": A system reception frame error "5" : A system reception CRC error "6": A system reception size error "7": A system reception collision error "8": B system reception normal completion "9": No B system reception carrier "A": B system reception carrier Crack "B": B system reception frame start without delimiter "C": B system reception frame error "D": B system reception CRC error "E": B system reception size error "F": B system reception collision error

Here, FIG. 15 is a diagram showing a part of an example of the system registration screen. When "Display engineering log" is selected from "File" on the upper left of the system registration screen, the screen transitions to the screen for saving the state of the engineering tool shown in FIG.

FIG. 16 is a diagram showing an example of a screen for saving the state of the engineering tool. In this engineering tool state save screen, the current state of the engineering tool can be saved.

Further, when performing RAS diagnosis (diagnosis related to RAS information), the RAS diagnosis result screen of FIG. 17 is displayed.

FIG. 17 is a diagram showing an example of a RAS diagnosis result screen. On this RAS diagnosis result screen, by selecting each item of "start date and time" and "refresh cycle" and operating the "start" and "stop" buttons, RAS diagnosis is performed and the result is displayed. To.

Next, FIG. 18 is a diagram showing an acquisition route of configuration information and RAS information by the wireless communication device 14 in the first embodiment. As shown in FIG. 18, the wireless communication device 14 acquires the RAS information from the controller 13 and the configuration information from the server device 11.

Next, FIG. 19 is a flowchart showing processing by the wireless communication device 14 of the first embodiment. For example, the system programmer operates the wireless communication device 14 when he / she wants to see the monitoring information (RAS information) of the device collected by the controller 13. Then, the following processing is executed in the wireless communication device 14.

First, in step S1, the acquisition unit 1412 acquires monitoring information (RAS information) from the controller 13.

Next, in step S2, the acquisition unit 1412 acquires the configuration information from the server device 11.

Next, in step S3, the display control unit 1411 selects a display item from the monitoring information (RAS information) based on the configuration information acquired in step S2 and the operation input by the user.

Next, in step S4, the display control unit 1411 causes the display unit 144 to display the display item selected in step S3. As a result, the system programmer can see the monitoring information (RAS information).

As described above, according to the wireless communication device 14 of the first embodiment, the staff (system programmer) monitors by acquiring the monitoring information (RAS information) from the controller 13 and the configuration information from the server device 11. It can make it possible to easily see the information.

That is, by using the wireless communication device 14, the staff member uses the system monitoring screen (FIG. 7), the I / O loop detailed alarm screen (FIG. 10), the system log screen (FIG. 11), and the serial I / O log screen (FIG. 7). 12), LAN management information screen (Fig. 13), node-specific detail screen (Fig. 14), system registration screen (Fig. 15), engineering tool state saving screen (Fig. 16), RAS diagnosis result screen (Fig. 17), etc. You can recognize various information by looking at.

Further, the level of information security can be improved by making the process flow in which the wireless communication device 14 acquires the configuration information after being given the authority to acquire the configuration information from the server device 11.

(Second Embodiment)
Next, the second embodiment will be described. Descriptions of the same items as in the first embodiment will be omitted as appropriate. In the second embodiment, the acquisition route of the configuration information and the RAS information by the wireless communication device 14 is different from that in the first embodiment.

FIG. 20 is a diagram showing an acquisition route of configuration information and RAS information by the wireless communication device 14 in the second embodiment. As shown in FIG. 20, the wireless communication device 14 acquires the RAS information from the controller 13 and the configuration information from the client device 12. The wireless communication device 14 acquires the authority to acquire the configuration information from the client device 12 from the server device 11 as needed.

In this way, according to the second embodiment, the wireless communication device 14 can acquire the configuration information from the client device 12 instead of the server device 11. Thereby, for example, the processing load of the server device 11 can be reduced.

(Third Embodiment)
Next, the third embodiment will be described. Descriptions of the same items as in the first embodiment will be omitted as appropriate. In the third embodiment, the acquisition route of the configuration information and the RAS information by the wireless communication device 14 is different from that in the first embodiment.

FIG. 21 is a diagram showing an acquisition route of configuration information and RAS information by the wireless communication device 14 in the third embodiment. As shown in FIG. 21, the wireless communication device 14 acquires RAS information and configuration information from the controller 13. The wireless communication device 14 acquires the authority to acquire the configuration information from the controller 13 from the server device 11 as needed.

In this way, according to the third embodiment, the wireless communication device 14 can acquire the configuration information from the controller 13 instead of from the server device 11 and the client device 12. Thereby, for example, the processing load of the server device 11 and the client device 12 can be reduced.

The program (monitoring application) executed by the wireless communication device 14 of the present embodiment is provided by being incorporated in a ROM or the like in advance. In addition, this program is configured to record and provide a file in an installable format or an executable format on a computer-readable recording medium such as a CD-ROM, a flexible disk, a CD-R, or a DVD. May be good.

Further, this program may be stored on a computer connected to a network such as the Internet and provided by downloading via the network. Further, this program may be configured to be provided or distributed via a network such as the Internet.

This program has a module configuration including the above-mentioned parts (display control unit 1411, acquisition unit 1412, transmission / reception control unit 1413), and as actual hardware, the CPU (processor) reads the program from the ROM and executes it. By doing so, each of the above parts is loaded on the main storage device, and each part is generated on the main storage device.

Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other embodiments, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are also included in the scope of the invention described in the claims and the equivalent scope thereof.

For example, the wireless communication device 14 is not limited to the tablet terminal, and may be another wireless communication device such as a smartphone.

1 ... Control system, 5 ... Local network, 11 ... Server device, 12 ... Client device, 13 ... Controller, 14 ... Wireless communication device, 15 ... Router, 141 ... Processing unit, 142 ... Storage unit, 143 ... Input unit, 144 ... Display unit, 145 ... Communication unit, 1411 ... Display control unit, 1412 ... Acquisition unit, 1413 ... Transmission / reception control unit.

Claims (7)

A wireless communication device capable of wirelessly connecting to a wired communication network in a control system including a controller for controlling a device and a computer device for managing the controller.
A monitoring information acquisition unit that acquires monitoring information that is monitoring target information related to the device from the controller, and
A configuration information acquisition unit that acquires configuration information that includes identification information and connection-related information related to the device from either the controller or the computer device.
A display control unit that selects display items from the monitoring information based on the configuration information and operation input by the user and displays them on the display unit.
A wireless communication device equipped with. The computer device includes a server device and a client device.
The wireless communication device according to claim 1, wherein the configuration information acquisition unit acquires the configuration information from the server device. The computer device includes a server device and a client device.
The wireless communication device according to claim 1, wherein the configuration information acquisition unit acquires the configuration information from the client device. The wireless communication device according to claim 1, wherein the configuration information acquisition unit acquires the configuration information from the controller. The wireless communication device according to claim 1, wherein the monitoring information is RAS (Reliability, Availability, Serviceability) information related to the device. The wireless communication device according to claim 2, wherein the configuration information acquisition unit acquires the configuration information after being authorized by the server device to acquire the configuration information. A wireless communication device that can be wirelessly connected to a wired communication network in a control system including a controller that controls a device and a computer device that manages the controller.
A monitoring information acquisition function that acquires monitoring information that is monitoring target information related to the device from the controller, and
A configuration information acquisition function for acquiring configuration information, which is information including identification information and connection-related information regarding the device, from either the controller or the computer device.
A display control function that selects a display item from the monitoring information based on the configuration information and operation input by the user and displays it on the display unit.
A monitoring application program for running.

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