JP2002268961A - Monitor controller, monitor control method and monitor control program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable display of information about equipment to be controlled to be managed by a plurality of controllers as one monitor picture by integrating the information, to relieve a communication load of a network and to enable high speed display of the monitor picture. SOLUTION: The respective controllers C1 , C2 , etc., manage one or more pieces of object equipment R11 , etc., R21 , etc., and R31 , etc., to be controlled. When a monitor picture providing request is generated from portable monitor terminals MT1 , MT2 , etc., a monitor controller 4 obtains required information by performing filter registration of required equipment R to be controlled in the controllers C1 , C2 , etc., and generates a Web page to be the monitor picture. The filter registration is valid only for prescribed valid time and when the request is generated from the portable monitor terminals MT1 , MT2 , etc., within the valid time, the Web page is generated at high speed without performing the filter registration. Thus, the monitor pictures for the plurality of pieces of the equipment to be controlled are provided at high speed without increasing the communication load of the network 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a supervisory control device, a supervisory control method, and a supervisory control program having a communication management function for monitoring and controlling the status of a supervisory control target device using a web in a distributed environment.

[0002]

2. Description of the Related Art In recent years, a monitoring and control system using a Web (Web) access technology for acquiring information on the World Wide Web (WWW) has been developed. In this type of monitoring and control system, the state of a monitoring and control target device is sequentially monitored using a Web browser (hereinafter, also simply referred to as a browser), and the control device can be operated from the browser. .

FIG. 24 is a block diagram showing the configuration of such a supervisory control system.

On the network 6, a plurality of control devices C
11, C12 and C13 are connected, and the respective control devices C11 to C12 control the respective controlled devices R11, R12 and R13, the controlled device R21 or the controlled devices R31 and R32. For example, the control devices C11 to C13 acquire monitoring information indicating various states from the controlled devices R11 to R32, and output control information to control the controlled devices R11 to R32.

[0005] In addition, a monitoring terminal T1
, T2 are also connected, and the control devices C11 to C13 and the monitoring terminals T1, T2 connect the network 6 with, for example, a TCP.
It can be connected by the / IP protocol. Control device C
11 to C13 have Web server functions, and monitor terminals T1,
T2 has a browser function. Control devices C11 to C13
Accumulates information acquired from each of the control target devices R11 to R32, and the monitoring terminals T1 and T2 start the browser and execute the Web
The server accesses the server and monitors the status of the control target devices R11 to R32.

Further, the monitoring terminals T1 and T2 can control the respective control target devices by giving control information to the respective control target devices R11 to R32 via the control devices C11 to C13 by operating the browser. .

By the way, in order to reduce the communication load of the network 6, it is necessary to transmit only the information related to the control target device managed by the monitoring terminals T1 and T2 from the corresponding control device. Therefore, each of the control devices C11 to C13 performs a filtering process for transmitting only necessary information. The control devices C11 to C13 transmit only the information from the devices registered in the filter among the information obtained from the control target devices R11 to R32 to the network 6. Filter registration is performed for each access from the monitoring terminals T1 and T2, and when transmission of information is completed, the filter registration is deleted.

In the monitoring and control system, the monitoring terminal T
1 and T2 need to obtain information in real time with each of the controlled devices R11 to R32. In such a system, it is convenient to use an application (applet) created in the Java language.

The monitoring terminals T1 and T2 can display, for example, information on the respective controlled devices R11 to R32 on a screen by using an applet. The filtering process in this case is performed for each applet. That is, the applet can explicitly describe the initialization processing and the termination processing, and a request for filter registration can be made to the Web server of the control device during the initialization processing, and a filter registration deletion request can be made at the termination processing. By using an applet, information from a plurality of control devices can be integrated and used.

However, operating an applet requires relatively high hardware capabilities. For this reason, when a mobile terminal such as a mobile phone is used as the monitoring terminals T1 and T2, it may not be possible to use an applet.

Therefore, when a device having relatively low hardware capability or a device that does not operate Java is used as the monitoring terminals T1 and T2, a browser display function using only a Web page generation language such as HTML is used. That is,
In this case, the control devices C11 to C13 generate Web pages based on the information of the control target devices R11 to R32, and the monitoring terminals T1 and T2 receive the Web pages using a browser, thereby generating the monitoring information. A screen based on the screen (hereinafter referred to as a monitoring screen) is displayed.

However, in order to display a monitoring screen using such a browser display function, a page for the monitoring screen must be created on the control device side that has obtained the monitoring information from the device to be controlled. Since each control device creates a page based only on the monitoring information of the controlled device managed by itself, the monitoring terminal sends a page to each control device in order to monitor the plurality of controlled devices managed by the plurality of control devices. It must be accessed, and it is not possible to display a monitoring screen for integrated monitoring.

[0013]

As described above, in the conventional monitoring and control system, in a monitoring terminal having relatively low hardware capability, information on devices to be controlled managed by a plurality of control devices is displayed on the same screen. There is a problem that it is not possible to display and monitor and control as one monitoring screen.

According to the present invention, even in a monitoring terminal having relatively low hardware capability, monitoring and control are performed by integrating information of devices to be controlled managed by a plurality of control devices and displaying the information as one monitoring screen on the same screen. It is an object of the present invention to provide a monitoring control device, a monitoring control method, and a monitoring control program that can perform the monitoring.

Further, the present invention provides a monitoring control apparatus and a monitoring control apparatus capable of reducing the communication load on a network when information of a plurality of controlled devices is displayed as a monitoring screen by a monitoring terminal having relatively low hardware capability. It is an object to provide a control method and a monitoring control program.

It is another object of the present invention to provide a monitoring control device, a monitoring control method, and a monitoring control program that can generate a monitoring screen in response to a request from a terminal at a high speed.

[0017]

According to a first aspect of the present invention, there is provided a monitoring and control apparatus provided on a network to which one or a plurality of control apparatuses for managing one or a plurality of control target devices are connected. An information management unit that obtains information about one or more control target devices from the control device via the network; an information storage unit that stores the information obtained by the information management unit; and an information storage unit that stores the information. Monitoring screen generating means for generating a monitoring screen indicating a state of one or more controlled devices based on information; and transmitting means for transmitting the monitoring screen generated by the monitoring screen generating means in response to a request from a monitoring terminal The monitoring and control method according to claim 10 of the present invention provides a monitoring and control method on a network to which one or a plurality of control devices for managing one or a plurality of control target devices are connected. An information management procedure for acquiring information about one or more control target devices from one or more control devices; a storage procedure for storing information acquired in the information management procedure; and information stored in the storage procedure. A monitoring screen generating procedure for generating a monitoring screen indicating a state of one or more control target devices based on the monitoring screen; and a transmitting procedure for transmitting the monitoring screen generated in the monitoring screen generating procedure in response to a request from a monitoring terminal. The monitoring control program according to claim 13 of the present invention,
An information management process for acquiring information on one or more control target devices from one or more control devices on a network to which one or more control devices that manage one or more control target devices are connected to a computer; A storage process for storing information acquired in the information management process, a monitor screen generation process for generating a monitor screen indicating a state of one or more control target devices based on the information stored in the storage process, and a monitoring terminal And transmitting a monitor screen generated in the monitor screen generation process in response to a request from the computer.
, One or a plurality of control devices are connected on a network, and each control device manages one or a plurality of control target devices. The information management means acquires information about one or more control target devices from one or more control devices via a network. The information acquired by the information management unit is stored in the information storage unit, and the monitoring screen generation unit generates a monitoring screen indicating the status of one or more control target devices based on the information stored in the information storage unit. In response to a request from the monitoring terminal, the transmitting unit transmits the monitoring screen generated by the monitoring screen generating unit. As a result, the status of a plurality of control target devices managed by a plurality of control devices on the network can be monitored.

According to a tenth aspect of the present invention, information on one or more controlled devices is obtained from one or more control devices on a network. The acquired information is stored, and a monitoring screen indicating the state of one or more controlled devices is generated based on the stored information. This monitoring screen is transmitted in response to a request from the monitoring terminal.

According to a thirteenth aspect of the present invention, one or more control devices are connected to a computer via a network.
An information management process for acquiring information on the device to be controlled, a storage process for storing the acquired information, and a monitor screen generation for generating a monitor screen indicating the state of one or more devices to be controlled based on the stored information Process, and a sending process of sending a monitoring screen generated in response to a request from the monitoring terminal, so that a plurality of control target devices managed by a plurality of control devices respond to the request from the monitoring terminal. Enable output of monitoring screen.

[0020]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a supervisory control system in which a supervisory control device according to one embodiment of the present invention is incorporated. In FIG. 1, the same components as those in FIG. 24 are denoted by the same reference numerals.

The network 6 is capable of transmitting data according to, for example, the TCP / IP protocol. Network 6
A plurality of control devices C1, C2,...
T2,... And the monitoring control device 4 are connected. In addition,
FIG. 1 shows only three control devices C1 to C3 and two monitoring terminals T1 and T2.

, R21,... And R31, R32,... Are the devices to be controlled in the monitoring and control system shown in FIG. Information can be output, and control according to the control information is received.
In FIG. 1, the control target devices R11 to R13, R21, R3
1, only R32 is shown.

The control device C1 acquires monitoring information indicating various states from one or more controlled devices R11, R12,... And outputs control information to control the controlled devices R11, R12,.
Control. Similarly, the control device C2 acquires monitoring information indicating various states from one or more controlled devices R21,... And outputs control information to control the controlled devices R21,. The control device C3 acquires monitoring information indicating various states from one or more controlled devices R31, R32,... And outputs control information to control the controlled devices R31, R3.
Control 2, ...

In this manner, the control devices C1, C2,... Grasp the current state of the devices to be controlled R11,..., R21,. Can be performed.

The monitoring terminals T 1, T 2,... Can be connected to the network 6 by, for example, the TCP / IP protocol. Further, in the present embodiment, the control target device R
The mobile monitoring terminals MT1, M2
T2,... Are also adopted. Mobile monitoring terminals MT1, MT2,
... can be connected to the monitoring and control device 4 using a predetermined communication line such as the wireless LAN 5. The wireless LAN 5 can transmit data according to, for example, a TCP / IP protocol.

The monitoring control device 4 has a storage unit.
The obtained monitoring information is stored, and information of a monitoring screen indicating the state of the control target device R is generated based on the stored monitoring information. For example, the monitoring control device 4 generates the information on the monitoring screen using a Web page description language such as HTML. The monitoring control device 4 has a Web server function, and transmits information of the generated monitoring screen via the Web server function.

The monitoring control device 4 and the portable monitoring terminal MT
The communication path between 1, 2, MT2, ... is not limited to the wireless LAN 5, but may be a wired network or a mobile phone network. The mobile monitoring terminals MT1, MT2,... Are not limited to mobile terminals, as long as they can browse Web pages described in HTML or the like.

In this embodiment, the monitoring control device 4
Collects monitoring information from a plurality of control devices C1, C2,..., Thereby generating a monitoring screen for integrating the states of the control target devices R managed by different control devices and displaying them on one screen. You can do it.

In a monitoring control system, real-time display of monitoring information is required. That is, the monitoring control device 4 needs to provide the portable monitoring terminals MT1, MT2,...

When it is assumed that the monitoring control device 4 collects information from a plurality of control target devices and generates information on a monitoring screen when a request is generated from the mobile monitoring terminals MT1, MT2,. It takes a relatively long time from access of MT1, MT2,... To display of the monitoring screen. Therefore, in the present embodiment, the monitoring control device 4
Has a storage unit, and collects and stores monitoring information in advance.

The monitoring and control device 4 includes a plurality of control devices C1, C
When generating an HTML page or the like by collecting information from 2,..., An HTML page or the like is created based on the latest information. It is necessary to maintain consistency with the current state of the control target device held by each of the control devices. Otherwise, the monitoring information displayed on the screen becomes the past, not only causing a time lag but also causing an operation based on erroneous information.

Therefore, if the latest information from each of the control devices C1, C2,... Is always transmitted to the monitoring and control device 4, it is possible to achieve consistency of the state. However, when the number of control devices and the number of control target devices are large, it is assumed that all information on all control target devices is acquired.
The network load increases significantly.

Therefore, when information is transmitted from each of the control devices C1, C2,... To the monitoring and control device 4, only information considered necessary for monitoring at that time is preferably transmitted to the control device C1.
, C2,... Are transmitted to the monitoring and control device 4 to reduce the amount of information flowing through the network 6.

In the present embodiment, a filtering process is performed in order to pass only necessary information to the network 6. That is, it instructs the registration and deletion of the filters for the control devices C1, C2,. However, since only static information display is performed in HTML or the like, when the temporal change of the monitoring information is to be viewed, it is necessary to repeatedly request generation of the same page and perform reloading. It is extremely inefficient to repeat the filter registration deletion process.

In addition, H is obtained from the monitoring control information that changes sequentially.
When generating a TML page or the like, generally a CGI
(Common Gateway Interface), Servlet, and other technologies are used. However, the time required to execute these processes is relatively short. Filter registration is performed at the start of these processes, and filter deletion is performed at the end. Doing so increases the processing overhead.

When the filter is registered, the latest information is stored in the monitoring and control device 4 until immediately before the filter is registered.
Since it has not been sent from C2,..., It is necessary to wait until the latest information is obtained from the control device and ensure the consistency of the information before generating the HTML page or the like before generating the HTML page or the like.

For these reasons, in the present embodiment, the filter registration and deletion are performed at an efficient timing without performing the filter registration and deletion for each access from the portable monitoring terminals MT1, MT2,. Thus, the processing overhead is reduced, the monitoring screen is created in a timely manner, and the information on the monitoring screen is obtained in a relatively short time from the access from the portable monitoring terminals MT1, MT2,. To provide

That is, in the present embodiment, each of the control devices C1, C2,... Once receives the transmission request from the monitoring and control device 4, and thereafter controls the device to be controlled until receiving the transmission stop request. Information is transmitted to the monitoring control device 4 by asynchronous communication using the device status of R as an event.

FIG. 2 is a block diagram showing a specific configuration of the monitoring control device 4 in FIG.

The communication device 11 communicates with the network 6 to take in the information flowing in the network 6 and output it to the page information generating device 10, and also transmits the information from the page information generating device 10 to the network 6. To send to. The wireless communication device 8 sends information from the Web server 9 to the wireless LAN 5 and takes in information transmitted via the wireless LAN 5.

The radio communication device 8 is connected to the portable monitoring terminals MT1,
When a monitoring screen providing request to the monitoring control device 4 is received from a Web browser on MT2,..., The request is transferred to the Web server 9. Web
The server 9 activates the page information generation device 10 according to the requested screen.

FIG. 3 is a block diagram showing a specific configuration of the page information generation device 10 in FIG. FIG. 4 is a block diagram showing a specific configuration of the control devices C1, C2,... In FIG.

Upon receiving the monitoring screen providing request, the Web page generating unit 12 of the page information generating apparatus 10 sends a request to the filter registering unit 17 to obtain the current information of the control target device R required for generating the relevant page. Then, the operation is started with the identification information of the control target device R that currently needs the information as an argument.

In this embodiment, the controlled device R is modeled using an object model, and the object name is used as identification information. For example, the object (OBJ-A, OBJ-B,...) Is
11, R12, ...

The Web page generation unit 12 fetches the latest information necessary for generating a monitoring screen from the objects stored in the control target device information management unit 15, and generates a Web page 13 using the fetched values. The generated Web page 13 is supplied to the Web server 9. The Web server 9 outputs the Web page to the portable monitoring terminals MT1, MT2,... Via the wireless communication device 8 and the wireless LAN 5 as monitoring screen information.

Which object information is required is stored and held in the filter information storage unit 19. The filter registration unit 17 determines whether or not the specified object has been registered in the filter information storage unit 19, and if not, registers the object name and the current time in the filter information storage unit 19. , Via the communication device 11 and the network 6, requests the control devices C 1, C 2,... To register the filter and transmit the current information using the object names as arguments.

FIG. 6 is an explanatory diagram showing the contents stored in the filter information storage unit 19. As shown in FIG. 6, the filter information storage unit 19 stores an object name for specifying a device to be controlled and a filter registration time (current time) in association with the object name.

In FIG. 4, when the message receiving unit 21 of the control device C1, C2,... Receives the filter registration and the transmission request of the current information from the monitoring control device 4, the filter information management unit 22 sends the request source identification information and the object information. Give a name and. As the request source identification information, for example, the IP address of the monitoring control device 4 is used.

The filter information management unit 22 registers the specified request source identification information and the specified object name in the filter table 23. FIG. 8 is an explanatory diagram showing the storage contents of the filter table 23. As shown in FIG. 8, the filter table 23 stores an object name for specifying a device to be controlled and transmission destination identification information in association with the object name.

The control device communication devices 25 of the control devices C 1, C 2,... Communicate with the connected control target devices R, acquire monitoring information, and transmit control signals to the respective control target devices R. Send. Controlled device information management unit 24
Controls the control device communication device 25 and acquires information from each control target device R.

FIG. 5 shows the control target device information management unit 2 in FIG.
4 is a block diagram showing a specific configuration of FIG. Note that FIG.
The control target device information management unit 15 in the middle has the same configuration as that of FIG.

The control target device information management unit 24 includes a message dispatch unit 27 and a plurality of storage units 26a and 26 corresponding to the control target devices managed by the control unit of the own device.
b,... Message dispatcher 27
Obtains information of each control target device R via the control device communication device 25, and stores in the storage unit 26 corresponding to each control target device.
a, 26b,... and the storage units 26a, 2
6b,... Are output. For example,
In the control target device information management unit 24 of the control device C1, three storage units 26a to 26c corresponding to the control target devices R11 to R13 are provided, and the message dispatch unit 27 stores the control target devices R11 to R13. Is stored in each of the storage units 26a to 26c and transmitted in response to a transmission request.

The control target device information management section 24 exchanges information with the control target device R via the control device communication device 25, and always obtains the latest information of the control target device R.

The message receiving unit 21 specifies the object requested to be transmitted to the control target device information management unit 24, and requests transmission of the current information of the object. The designated storage unit in the control target device information management unit 24 is activated by the message dispatch unit 27,
The held current information is output to the filter information management unit 22 for transmission to the request source.

The filter information management unit 22 checks whether or not the source of the current information transferred from the controlled device information management unit 24 is registered in the filter table 23. If the source is registered, the transmission is performed. The current information of the specified object is transmitted to the destination specified by the destination identification information (IP address). Filter information management unit 2
2 is supplied to the message transmitting unit 20;
The message transmission unit 20 transmits the current information of the specified object to the requesting monitoring control device 4 via the network 6.

The communication device 11 of the monitoring control device 4 supplies the current information received via the network 6 to the control target device information management unit 15. The configuration of the control target device information management unit 15 is the same as that of FIG.
, R21,..., R21,.
It has a plurality of storage units corresponding to (objects). The control target device information management unit 15 stores the input current information in the storage unit of the corresponding object.

When the current information in the storage unit is updated, the control target device information management unit 15 notifies the Web page generation unit 12 that the information has been updated to the latest information. The Web page generation unit 12 fetches the latest information necessary for generating a monitoring screen from each storage unit of the control target device information management unit 15, and generates a Web page 13 using the fetched values.

In this embodiment, for the objects registered as filters by the filter registration unit 17, the controlled device information management units 24 of the control devices C1, C2,... The information is transmitted to the page information generation device 10 via the filter information management unit 22, the message transmission unit 20, and the network 6, and the storage unit of the control target device information management unit 15 is updated.

In the present embodiment, the process of deleting the control target device from the filter table 23 is performed by the filter deletion unit 18 in the page information generation device 10 based on the contents stored in the control target device valid time storage unit 16. Done. The control target device effective time storage unit 16 holds information on the effective time of each object for which the filter registration is valid from a predetermined filter registration.

FIG. 7 is an explanatory diagram showing the contents stored in the controlled device effective time storage section 16 in FIG. As shown in FIG. 7, the control target device valid time storage unit 16 stores an object name for specifying the control target device and valid time information in association with the object name.

The filter deletion unit 18 is started periodically, for example, at a three-second cycle, and is stored in the filter information storage unit 19.
From one object name and its filter registration time. The filter deletion unit 18 obtains a time at which the filter registration should be deleted by adding the valid time for each object registered in the control target device valid time storage unit 16 to the read filter registration time. Note that the filter deletion unit 18 may obtain a time at which the filter registration should be deleted by adding a fixed time (for example, 10 seconds) to the read filter registration time.

The filter deletion unit 18 compares the calculated time to be deleted with the current time, and when the current time reaches the time to be deleted, the control devices C 1, C 2,... Via the communication device 11 and the network 6. Sends a filter deletion request with the name of the control target device to be deleted as an argument.

When a deletion request is input via the message receiving unit 21, the filter information management unit 22 of the control devices C1, C2,... Deletes information on the specified target control device from the filter table 23. going on.

Similarly, the filter deletion unit 18 determines whether or not the control target device information should be deleted from the filter for all the objects in the filter information storage unit 19, and performs a deletion process.

The page information generation device 10 is provided with a link destination page analysis unit 14. The link destination page analysis unit 14 generates the Web page generated by the Web page generation unit 12.
Referring to page b, if there is a linked page in the page, it instructs filter registering unit 17 to register a filter for acquiring information on a control target device necessary for creating the linked page. It is supposed to.

Next, the operation of the embodiment configured as described above will be described with reference to the flowcharts of FIGS. 9 shows a page generation process, FIG. 10 shows a filter deletion process, FIG. 11 shows a process when the page information generation device receives a message, and FIG. 12 shows a process when the control device receives a message.

Now, using the portable monitoring terminal MT1, 2
Device R controlled by the two control devices C1 and C2, respectively.
11, the state of R21 is to be monitored. Mobile monitoring terminal M
T1 generates a monitor screen providing request for the control target devices R11 and R21, and transmits the request to the monitor control device 4 via the wireless LAN 5. The monitoring screen providing request is received by the wireless communication device 8, and the wireless communication device 8 sends the monitoring screen providing request to We
b Transfer to server 9. Upon receiving the monitoring screen providing request in step S1 of FIG. 9, the Web server 9 activates the page information generating device 10 according to the requested screen.

The page information generation device 10 acquires the current information of the control target device R required for generating a page according to the monitoring screen providing request. That is, the Web page generation unit 12 activates the filter registration unit 17 using the object name of the control target device R for which the current information needs to be acquired as an argument. In step S2, the filter registration unit 17 determines whether the specified objects (OBJ-A) and (OBJ-D) have been registered in the filter information storage unit 19.

Now, it is assumed that these objects have not been registered. In this case, the filter registration unit 17
Requests the registration of an unregistered object in step S4, and the filter information storage unit 19 stores the object (O
BJ-A), (OBJ-D) and the current time are newly registered (step S5).

In step S6, the filter registration unit 17 sends an object (OBJ) to the communication device 11.
-A) and (OBJ-D) are used as arguments to request the control devices C1 and C2 to register the filter and transmit the current information (step S7).

The message receiving section 2 of each of the control devices C1 and C2
When the filter registration and the current information are received in step S31 of FIG. 12, the message type is determined in step S32, and then the request source identification information and the object name (OBJ-A), (OB
JD) is output.

In step S34, the filter information management unit 22 of each of the control devices C1 and C2 sets the object name (O
BJ-A) and (OBJ-D) are registered.

Further, the message receiving unit 21 of each of the control devices C1 and C2, in step S35, determines the corresponding object (OBJ-A), (O
BJ-D) is requested to transmit the current information.

That is, the controlled device information management unit 24 of the control devices C 1 and C 2 uses the message dispatch unit 27 to specify the designated objects (OBJ-A), (OBJ).
JD). At this time, the control device C1
, Only the object (OBJ-A) is activated, the control device C2 activates only the object (OBJ-D), and the activation request for the non-existent object is ignored.
The activated object outputs the read information to the filter information management unit 22 in order to cause the current information held in the storage unit 26 to be read and transmitted to the request source.

The control device communication device 25 constantly exchanges information with the control target device R, and the object in the control target device information management unit 24 has obtained the latest information of the control target device R. Also, the filter information management unit 22
Checks whether or not the source of the information is currently registered in the filter table 23. In this case, (OBJ-A) and (OBJ-D) are determined in step S34.
Is already registered, the transmission process from step S35 is executed.

In the next step S36, the control device C1
, C2 transmits the current information of the objects (OBJ-A) and (OBJ-D) via the filter information management unit 22 and the message transmission unit 20, respectively.

In step S34, the filter information management unit 22 can register only the objects existing in the own control device in the filter table 23 by referring to the control target device information management unit 24. In this case, only the existing object is activated in step S35.

The current information is stored in the communication device 1 of the monitoring control device 4.
1 (step S21 in FIG. 11) and supplied to the control target device information management unit 15. The control target device information management unit 15 stores the object (OBJ) in the corresponding storage unit.
-A) and (OBJ-D) are stored (step S22). Object (OBJ-A), (OBJ-
When D) is updated with the latest information, the control target device information management unit 15 notifies the Web page generation unit 12 that the information has been updated to the latest information (step S23).

Upon receiving this notification, the Web page generation unit 12 shifts the processing from step S7 in FIG. 9 to step S8, and sets the objects (OBJ-A) and (OBJ-A).
The latest information of D) is fetched, and a Web page 13 for indicating the status of the control target devices R11 and R21 on one monitoring screen is generated using the fetched values (step S9).

The generated Web page 13 is provided from the Web server 9 to the portable monitoring terminal MT1 via the wireless communication device 8 and the wireless LAN 5. Thus, on the screen of the portable monitoring terminal MT1, the control target devices R11 and R21 are displayed.
Is displayed on the integrated one monitoring screen.

Next, it is assumed that the portable monitoring terminal MT2 requests a monitoring screen indicating the states of the control target devices R11 and R21. When this request occurs within the valid time range held in the control target device valid time storage unit 16, for example, when the valid time is as shown in FIG.
If it occurs eight seconds after the request by T1, at step S2, the objects (OBJ-A), (OB
JD) is determined to have been registered.

Then, the process shifts from step S2 to step S3, where the filter registration time corresponding to the objects (OBJ-A) and (OBJ-D) in the filter information storage unit 19 is updated by the current time, and The effect is transmitted to the Web page generation unit 12.

At this point, the objects (OBJ-A) and the objects (OBJ-A) in the filter table 23 of the control devices C1 and C2 are
(OBJ-D) is not deleted but registered. Accordingly, the control target devices R11, R21 (objects (OBJ-A), (OBJ-
If the state of D)) changes, the changed information is automatically notified to the corresponding storage unit of the control target device information management unit 24 of each of the control devices C1 and C2, and the control target device information management unit 24, the updated current information,
Is automatically transferred to and stored in the corresponding storage unit of the control target device information management unit 15.

That is, until the valid time stored in the controlled device valid time storage unit 16 has elapsed from the first monitor screen transfer request, the control target device information management is performed without performing a new filter registration process. The unit 15 stores the latest information sequentially.

The Web page generation unit 12 fetches the latest information of the objects (OBJ-A) and (OBJ-D), and generates a Web page 13 showing one monitoring screen using the fetched values. The generated Web page 13 is
It is provided from the eb server 9 to the portable monitoring terminal MT2 via the wireless communication device 8 and the wireless LAN 5.

That is, when a request for generating a monitoring screen is issued,
There is no need to send a current information transfer request to the control device, thereby reducing the load on the communication path and enabling a high-speed generation of a monitoring screen.

Further, when a similar monitoring screen providing request for the control target devices R11 and R21 is continuously generated from another portable wireless terminal (not shown), extremely high-speed communication is performed without substantially increasing the network traffic. Can provide a monitoring screen.

Further, the Web page generation unit 12
When the web page 13 is generated, the link destination page analysis unit 14 refers to the generated web page 13 to obtain information on the control target device necessary to create the link destination page in the page. Register the filter of. As a result, in the portable monitoring terminals MT1, MT2,.
Even if a link set on the monitoring screen indicating the status of the control target devices R11 and R21 is specified and a monitor screen display of information on the linked control target device is requested, a filter is registered in advance before this request. Is performed, a high-speed monitoring screen can be generated.

For example, when a link to another control target device related to a predetermined control target device is set, a filter for the other control target device related to a request for providing a monitor screen to the predetermined control target device is set. By performing the registration, it is possible to provide a monitoring screen for other related control target devices in a short time.

Next, it is assumed that the effective time shown in FIG. 7 has elapsed from the last monitoring screen providing request of the portable monitoring terminals MT1, MT2,. Then, the filter information deletion processing shown in FIG. 10 is performed.

In the process of deleting the registration from the filter table 23, the filter deletion unit can be activated at the time obtained by adding the filter registration time and its effective time for each object. However, in the present embodiment, the page information generation is performed. It is assumed that the process is executed by periodically starting the filter deleting unit 18 in the device 10. Step S in FIG.
When the start time of the filter deletion unit 18 is reached in 11,
The filter deletion unit 18 extracts one object name and its filter registration time from the filter information storage unit 19 (step S12). The filter deletion unit 18 adds the effective time of each object registered in the control target device effective time storage unit 16 to the extracted filter registration time and compares it with the current time.

Now, for example, the portable monitoring terminals MT1, MT
Assuming that 12 seconds have elapsed since the last monitoring screen provision request of 2,..., The object (OBJ
Regarding -A), the time from the filter registration exceeds the valid time. In this case, the process proceeds to step S14.
The process proceeds from the step S15 to a step S15,
Is the object (OB) from the filter information storage unit 19.
JA), and deletes the object (OBJ) from the communication device 11 to the control devices C1, C2,.
A filter deletion request is sent using -A) as an argument (step S16).

This deletion request is sent to the control devices C1, C2,.
Is transferred to the filter information management unit 22 via the message receiving unit 21 of the above. The filter information management unit 22 is configured as shown in FIG.
The process shifts from step S32 of step 2 to step S33,
Target control device specified from filter table 23
To remove the (OBJ-A) information about. If the corresponding target control device has not been registered, the deletion request is ignored.

On the other hand, the filter deletion unit 18 of the monitoring control device 4 returns the processing from step S17 to step S12, and repeats the same processing for the next object. In the example of FIG. 7, the other objects (OBJ-B), (OBJ
Regarding -D), a deletion request is not issued because the time since registration has not exceeded the valid time. When the processing for all the objects is completed, the processing returns from step S17 to step S11, and waits until the next operation time of the filter deletion unit 18.

The filter registration is automatically deleted after a predetermined time according to the setting of the control target device effective time storage unit 16, so that unnecessary monitoring information is prevented from flowing on the network.

As described above, in the present embodiment, the monitoring control device integrates monitoring information from a plurality of control devices to generate one monitoring screen. Even in a monitoring terminal in which Java does not operate, the status of a plurality of control target devices managed by a plurality of control devices can be monitored on one monitoring screen. In addition, the filter is registered at an efficient timing without registering and deleting the filter each time an access is made from the mobile monitoring terminal, thereby reducing processing overhead and enabling high-speed display of the monitoring screen. . Further, even when access to one or more common control target devices is generated from a plurality of portable monitoring terminals during the filter registration period, the information amount is the same as that of the case where only one access is made to the monitoring control device from the plurality of control devices. Since only data is transferred, the communication load on the network can be reduced. Further, since the deletion of the filter registration is performed according to the setting of the control target device effective time storage unit, it is possible to prevent the communication load on the network from increasing.

In the above embodiment, the filter deletion unit 18 determines whether or not to delete an object by comparing the result of addition of the filter registration time and the effective time with the current time. When the filter is registered by the filter registration unit 17, the effective time may be recorded based on the setting of the controlled device effective time storage unit. In this case, the filter deletion unit 18 may determine whether to delete the registration only by comparing the effective time with the current time.

In the above embodiment, the control target device effective time storage unit 16 holds information on the effective time for each object. However, the importance is set for each object, and registered for each importance. The effective time until the object is deleted for each object may be obtained according to the information of the effective time and the importance of the object. For example,
Set a long validity time for objects with high importance.

Further, depending on the configuration of the monitoring system, it is possible to set the validity time of a predetermined object to be indefinite and to enable the filter registration continuously after the first request.

FIGS. 13 and 14 are block diagrams showing a page information generating device and a control device employed in another embodiment of the present invention. In FIGS. 13 and 14, the same components as those in FIGS. 3 and 4 are denoted by the same reference numerals, and description thereof will be omitted. The configuration of this embodiment other than the page information generating device and the control device is the same as that of the embodiment of FIG.

In the embodiment shown in FIG. 1, the monitoring and control device 4 issues a filter deletion command to the control devices C1, C2,... At the time of the request, the monitoring control device 4 transmits the control target device identification information (object name) to the control device as an argument, and the control devices C1, C2
2,… It is also possible to delete the filter itself. The present embodiment is applied to this.

The page information generating apparatus 10 'of the present embodiment
As shown in FIG. 13, the control target device valid time storage unit 16 is omitted, and the filter deletion unit 1 is replaced with the filter deletion unit 18 and the filter information storage unit 19, respectively.
The difference from the page information generation device 10 of FIG. 3 is that the 8 'and the filter information storage unit 19' are employed. Further, as shown in FIG. 14, the control devices C21, C22,... According to the present embodiment have a filter deletion unit 32 and a control target device effective time storage unit 33 added thereto. Are different from the control devices C1, C2,... In FIG.

FIG. 15 is an explanatory diagram showing the contents stored in the filter information storage unit 19 'in FIG. As shown in FIG. 15, the filter information storage unit 19 'stores only information of an object name that specifies a device to be controlled.

FIG. 16 shows the filter table 2 in FIG.
It is explanatory drawing which shows the storage content of 3 '. As shown in FIG. 16, the filter table 23 'stores not only information on an object name for specifying a device to be controlled, its destination identification information, but also information on a filter registration time of each object. The filter table 23 'is managed by the filter information management unit 22, and the filter information management unit 22 updates the filter registration time every time a monitoring screen providing request is notified.

In the present embodiment, the process of registering and deleting a control target device from the filter table 23 'is performed based on the contents stored in the control target device valid time storage unit 33, based on the filters in the control devices C21, C22,. This is performed by the deletion unit 32. The control target device valid time storage unit 33 holds information on the valid time of each object for which the filter registration is valid from a predetermined filter registration.

The filter deletion unit 32 is started periodically, for example, at a cycle of 3 seconds, and stores the filter table 23 '.
From one object name and its filter registration time. The filter deletion unit 32 adds the valid time of each object registered in the control target device valid time storage unit 33 to the read filter registration time to obtain a time at which the filter registration should be deleted. Note that the filter deletion unit 32 may obtain a time at which the filter registration should be deleted by adding a fixed time (for example, 10 seconds) to the read filter registration time.

The filter deletion unit 32 compares the calculated time to be deleted with the current time. When the current time reaches the time to be deleted, the filter deletion unit 32 filters the filter deletion request for deleting the object from the filter table 23 '. Output to the information management unit 22.

When a filter deletion request is input, the filter information management unit 22 deletes an object from the filter table 23 'based on the request, and
A filter deletion unit 31 of the page information generation device 10 'sends a deletion notification regarding this deletion via the message transmission unit 20.
Send to

When the deletion notification is input, the filter deletion unit 31 deletes the corresponding object from the filter information storage unit 19 '.

Next, the operation of the embodiment configured as described above will be described with reference to the flowcharts of FIGS. FIG. 17 shows a page generation process, and FIG.
19 shows a filter deletion process, FIG. 19 shows a process when the page information generating device receives a message, and FIG. 20 shows a process when the control device receives a message. 17 to 20, the same steps as those in FIGS. 9 to 12 are denoted by the same reference numerals, and description thereof will be omitted.

At the time of the first filter registration, FIG.
When a new object is registered in step S5 of step 7, the filter registration unit 17 registers only the object name and does not register the current time. On the other hand, the filter information management unit 22 of the control devices C21, C22,.
0, in step S45, the filter table 23 '
The object name and registration time (current time) are registered in.

If filter registration has already been performed for a necessary object, step S10 in FIG.
, The filter registration unit 17 of the monitoring control device requests the control devices C21, C22,... Via the communication device 11 to update the filter registration time. Control devices C21, C22, ...
Updates the registration time of the object to the current time in step S43 of FIG.

Other processes for generating a message are the same as those in the embodiment shown in FIG. 1. Within the validity period of the filter registration, the registered object is constantly updated, and the portable monitoring terminals MT1, MT2,. A monitoring screen showing the state of the controlled device R can be displayed in a short time.

Next, it is assumed that the valid time set in the control target device valid time storage unit 33 has elapsed from the last monitoring screen providing request of the portable monitoring terminals MT1, MT2,. The filter deletion unit 32 of the control devices C21, C22,.
When it is detected in step S11 that the start time has been reached, one object name and its filter registration time are extracted from the filter table 23 '. The filter deletion unit 32 adds the effective time of each object registered in the control target device effective time storage unit 33 to the extracted filter registration time and compares the added time with the current time. Thereby, the filter deletion unit 32 determines whether the registered object has expired.

If the expiration date has expired, the process shifts from step S14 to step S38, and the filter deletion unit 32 controls the filter information management unit 22 to execute the expiration of the expired object in the filter table 23 '. Delete the entry for. Next, the filter deletion unit 32 controls the filter information management unit 22 to cause the message transmission unit 20 to transmit a deletion notification of the expired object to the page information generation device 10 '(step S39).

When the page information generating device 10 'receives the deletion notification, the filter deletion unit 31 deletes the entry of the object for which the deletion notification has been received from the filter information storage unit 19' in step S42.

Other functions are the same as those of the embodiment shown in FIG.

As described above, in the present embodiment, FIG.
The same effect as that of the embodiment can be obtained, and the deletion of the registered object can be determined on the control device side. The filter is automatically deleted after the expiration of the valid time without issuing a filter deletion command from the monitoring control device to the control device, so that the load on the network 6 can be reduced and the processing load of the monitoring control device is also reduced. Can be reduced.

Incidentally, information indicating the valid time may be stored at the time of filter registration. That is, the control target device valid time storage unit is held in the page information generation apparatus 10, the filter registration unit obtains the time to delete the filter from the current time and the valid time, and deletes the filter together with the object name when requesting the filter registration. It is also possible to specify the time. In this case, when a reference request to the filter-registered object is issued, the deletion time is obtained again to update the deletion timing on the control device. On the control device, the control target device effective time storage unit 33
Becomes unnecessary, and the filter is deleted at the time indicated in the filter table.

Further, the validity time may be reset according to the importance of the object, as in the embodiment of FIG.

FIGS. 21 and 22 show a page information generation device 50 and a control device C employed in another embodiment of the present invention.
It is a block diagram which shows 31, C32, .... FIG. 21 and FIG.
2, the same components as those in FIGS. 3 and 4 are denoted by the same reference numerals, and description thereof will be omitted. The configuration of this embodiment other than the page information generating device and the control device is the same as that of the embodiment of FIG. This embodiment corresponds to a case where an alarm is generated.

The page information generation device 50 of the present embodiment is different from the page information generation device 10 of FIG. 3 in that an alarm processing unit 26 is added. Further, the control device C31,
The control device C32 shown in FIG. 4 employs a filter information management unit 22 'instead of the filter information management unit 22.
1, C2,...

The filter information management section 22 'of the control devices C31, C32,... Has the same function as the filter information management section 22, and uses the objects stored in the control target device information management section 24 to control the control target equipment R. When the alarm state is detected and notified to that effect, the control target device in which the alarm state has occurred is registered in the filter table 23 as an object. When detecting an alarm condition, the filter information management unit 22 ′ transmits an alarm message from the message transmission unit 20 to the page information generation device 50.

The object has a current temperature and means for judging whether the temperature does not exceed a predetermined upper limit or lower limit. If the temperature exceeds the upper limit or lower limit, the object may be suspicious. It is assumed that the system is configured to notify an alarm state when a person enters or exits.

The alarm processing unit 26 of the page information generation device 50
Receives the alarm message, the filter registration unit 1
7 and the filter information storage unit 19 are registered as objects of the control target device in which the alarm condition has occurred, and the registration time is changed to the alarm mode time. As the alarm mode time, for example, a special time is set such that deletion is not permitted until the operator confirms. As a special time, for example, 9999: 9
9:99 99:99:99 and the like can be considered.

Next, the operation of the embodiment configured as described above will be described with reference to the flowchart of FIG.

In step S51 of FIG. 23, the filter information management unit 22 'of the control devices C31, C32,... Notified by For example, the object notifies an alarm state when the temperature exceeds the upper limit or the lower limit or when a suspicious person enters or exits.

When the alarm state is grasped, the filter information management section 22 'judges whether or not the object indicating the control target device in which the alarm state has occurred is registered in the filter table 23 in step S52. If not registered, in step S53, the object of the controlled device for which the alarm condition has occurred is registered in the filter table 23.

In step S54, the filter information management section 22 'causes the message transmission section 20 to transmit an alarm message indicating the occurrence of an alarm state to the page information generation device 50.

This warning message is received by the warning processing section 26 of the page information generating device 50 via the communication device 11 (step S55). The alarm processing unit 26 determines whether or not the object in which the alarm condition has occurred is registered in the filter information storage unit 19 in step S56. If it is registered, the alarm processing unit 26
The filter registration time is changed to the alarm mode time (step S58). If you are not registered,
The alarm processing unit 26 registers the object indicating the control target device in which the alarm state has occurred, and sets the registration time to the alarm mode time (step S57).

In the next step S59, the alarm processing unit 26 updates or newly stores the current information of the controlled device in which the alarm condition has occurred in the storage unit of the controlled device information management unit 15. In step S60, the Web page generation unit 12 reads the current information from the control target device information management unit 15, and generates an alarm screen.

As described above, when an alarm condition occurs, an alarm screen is generated without an access request from the portable monitoring terminals MT1, MT2,. For example, when the portable monitoring terminals MT1, MT2,... Generate a monitoring screen providing request, an alarm screen is displayed prior to the requested monitoring screen. Thus, when an alarm condition occurs, an alarm screen indicating the alarm condition can be immediately displayed by accessing the portable monitoring terminal. Of course, it is also possible to notify the occurrence of the alarm by means such as e-mail or telephone to a mobile phone.

When confirming that the operator has canceled the alarm, the alarm processing unit 26 changes the alarm mode time to the current time for the object in the alarm state stored in the filter information storage unit 19.

As described above, in the present embodiment, the same effects as those of the embodiment of FIG. 1 can be obtained, and when an alarm condition occurs, the alarm condition can be set without the monitor person specifying the device to be controlled. Information about the generated control target device can be provided to the portable monitoring terminal through an alarm screen.

Although the present embodiment has been described with reference to the example applied to the embodiment of FIG. 1, it is apparent that the present embodiment may be applied to the embodiments of FIGS.

In each of the above embodiments, not only the portable monitoring terminals MT1, MT2,... But also the monitoring terminals T1, T2.
Obviously, the information of the monitoring screen may be obtained from the monitoring control device 4 for 2,.

In each of the above embodiments, the filter registration is deleted according to the set effective time.
The filter registration may be deleted when a predetermined event occurs from the control device, the portable monitoring terminal, or the like.

[0138]

As described above, according to the present invention, information on devices to be controlled managed by a plurality of control devices can be integrated even on a monitoring terminal having relatively low hardware capability, and can be displayed on the same screen. In addition, when monitoring and controlling can be performed by displaying the information on a plurality of control target devices as a single monitoring screen by a monitoring terminal having relatively low hardware capability, the communication load on the network can be reduced. This has the effect that the generation of the monitoring screen according to the request of the terminal can be accelerated.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a supervisory control system in which a supervisory control device according to an embodiment of the present invention is incorporated.

FIG. 2 is a block diagram showing a specific configuration of the monitoring control device 4 in FIG.

FIG. 3 is a block diagram showing a specific configuration of a page information generation device 10 in FIG. 2;

4 is a block diagram showing a specific configuration of control devices C1, C2,... In FIG.

FIG. 5 is a block diagram showing a specific configuration of a control target device information management unit 24 in FIG. 4;

FIG. 6 is an explanatory diagram showing storage contents of a filter information storage unit 19;

FIG. 7 is an explanatory diagram showing storage contents of a control target device effective time storage unit 16 in FIG. 3;

FIG. 8 is an explanatory diagram showing the storage contents of a filter table 23.

FIG. 9 is a flowchart illustrating a page generation process.

FIG. 10 is a flowchart illustrating filter deletion processing.

FIG. 11 is a flowchart illustrating processing performed by the page information generation device when receiving a message.

FIG. 12 is a flowchart showing processing when the control device receives a message.

FIG. 13 is a block diagram showing a page information generation device employed in another embodiment of the present invention.

FIG. 14 is a block diagram showing a control device employed in another embodiment of the present invention.

FIG. 15 is an explanatory diagram showing storage contents of a filter information storage unit 19 ′ in FIG. 13;

FIG. 16 is an explanatory diagram showing storage contents of a filter table 23 ′ in FIG. 14;

FIG. 17 is a flowchart illustrating a page generation process.

FIG. 18 is a flowchart illustrating filter deletion processing.

FIG. 19 is a flowchart illustrating processing performed by the page information generation device when receiving a message.

FIG. 20 is a flowchart showing processing when the control device receives a message.

FIG. 21 is a block diagram showing a page information generation device employed in another embodiment of the present invention.

FIG. 22 is a block diagram showing control devices C31, C32,... Employed in another embodiment of the present invention.

FIG. 23 is a flowchart for explaining the operation of the embodiment of FIGS. 21 and 22;

FIG. 24 is a block diagram showing a configuration of a monitoring and control system in a conventional example.

[Explanation of symbols]

4 monitoring control device, 5 wireless LAN, 6 network, MT1, MT2, portable monitoring terminal, C1, C2,.
Control device, R11-R32 ... Control target equipment.

Continuing on the front page (72) Inventor Takayuki Miyazawa 1 Toshiba-cho, Komukai Toshiba-ku, Kawasaki-shi, Kanagawa Prefecture Inside the Toshiba R & D Center Co., Ltd. F-term in Toshiba Research and Development Center Co., Ltd. (reference) LL01 LL05 LL11

Claims (15)

[Claims] A control device for managing one or a plurality of control target devices is provided on one or a plurality of connected networks, and one or more control devices relate to one or more control target devices via the network. Information management means for acquiring information; information storage means for storing the information acquired by the information management means; and a monitoring screen showing a state of one or more of the controlled devices based on the information stored in the information storage means. A monitoring screen generating means for generating the monitoring screen, and a transmitting means for transmitting the monitoring screen generated by the monitoring screen generating means in response to a request from a monitoring terminal. 2. The monitoring screen generating means generates the monitoring screen by a web page, and the sending means provides the monitoring terminal with the monitoring screen by web access. 3. The monitoring control device according to claim 1. 3. The information management unit according to claim 1, wherein the information management unit is configured to transmit only information regarding the control target device in response to the request from the monitoring terminal from one or more of the control devices via the network. Filter registration processing for the corresponding control device at the time of the request, and omitting the filter deletion processing performed after transmission of the transmission means in response to the request from the monitoring terminal for the filter registration processing. 2. The monitoring and control device according to claim 1, further comprising means. 4. The monitoring control apparatus according to claim 3, wherein the information management unit includes a filter registration deletion unit that executes a filter deletion process omitted by the filter registration unit at a predetermined timing. 5. The filter registration deleting unit includes a valid time setting unit that sets a valid time of filter registration, and determines an execution timing of the filter deleting process based on the setting of the valid time setting unit. The monitoring control device according to claim 4, wherein: 6. The information management means includes a time registration means for registering or updating a current time for each request from the monitoring terminal in correspondence with the filter registration processing of the filter registration means, 6. The monitoring apparatus according to claim 5, wherein the means determines the execution timing of the filter deletion processing using the set value of the valid time setting means and the current time registered by the time registration means. Control device. 7. The information management unit may register or update a time indicating a period during which the filter registration process is valid for each request from the monitoring terminal in correspondence with the filter registration process of the filter registration unit. 5. The monitoring control apparatus according to claim 4, further comprising a term registration unit, wherein the filter registration deletion unit determines an execution timing of the filter deletion process in accordance with the registered contents of the expiration date registration unit. 6. 8. When the link to the related monitor screen is set in the monitor screen generated by the monitor screen generator, the filter registering unit uses the set link destination monitor screen. The monitoring control apparatus according to claim 3, further performing a filter registration process for transferring information about a control target device to be used from one or more control apparatuses via the network. 9. The information management unit according to claim 1, wherein the information management unit is configured to transfer one or more of the control devices in order to transfer only information relating to the control target device from the one or more control devices via the network in response to the request from the monitoring terminal. A filter registration process is performed on the corresponding control device by a predetermined event transferred from the device via the network, and the sending unit responds to the request from the monitoring terminal for the filter registration process. 2. The monitoring control apparatus according to claim 1, further comprising a filter registration unit for omitting a filter deletion process performed after the transmission. 10. An information management procedure for acquiring information on one or more control target devices from one or more control devices on a network to which one or more control devices managing one or more control target devices are connected. A storage procedure for storing information acquired in the information management procedure, and a monitoring screen generation procedure for generating a monitoring screen indicating a state of one or more control target devices based on the information stored in the storage procedure, A transmission step of transmitting the monitoring screen generated in the monitoring screen generation procedure in response to a request from a monitoring terminal. 11. The information management procedure according to claim 1, further comprising the step of first transmitting from the one or more control devices via the network only one information related to the device to be controlled in response to the request from the monitoring terminal. At the time of the request, execute a filter registration process for the corresponding control device,
11. The monitoring control method according to claim 10, further comprising a filter registration procedure for omitting a filter deletion processing performed after the transmission procedure in response to a request from the monitoring terminal for the filter registration processing. 12. The monitoring control method according to claim 11, wherein the information management procedure includes a filter registration deletion procedure for executing a filter deletion process omitted in the filter registration procedure at a predetermined timing. 13. A computer in which one or a plurality of control devices for managing one or a plurality of control target devices are connected to one or a plurality of control devices to obtain information on one or more control target devices from one or more control devices. Information management processing, storage processing for storing information acquired in the information management processing, and monitoring screen generation for generating a monitoring screen indicating a state of one or more controlled devices based on the information stored in the storage processing A monitoring control program for executing a process and a sending process of sending the monitoring screen generated in the monitoring screen generating process in response to a request from a monitoring terminal. 14. The information management process according to claim 1, further comprising the step of: transmitting only information relating to a device to be controlled in response to a request from the monitoring terminal from one or more of the control devices via the network. At the time of the request, execute a filter registration process for the corresponding control device,
14. The monitoring control program according to claim 13, wherein a filter deletion process performed after sending the sending process in response to a request from the monitoring terminal for the filter registration process is omitted. 15. The monitoring control according to claim 14, wherein the information management processing includes a filter registration deletion processing for executing a filter deletion processing omitted from the filter registration processing at a predetermined timing. program.