JPH11122679A - Remote supervisory control system and remote supervisory control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To apply remote supervisory control to various installation and devices at sites almost in real time without the need for a specific software corresponding to each supervisory control system at sites for a client terminal at a center. SOLUTION: This system is provided with a site side information storage means 2 that is included in a site side supervisory control system 1 and stores state information relating to each installation or device while updating it sequentially and with a communication means 3 that down-loads the site side information from the site side information storage means 2 on an access request from a client terminal 4 and transfers the supervisory control instruction in response to the site side information to be down-loaded to the site side supervisory control system 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a remote monitoring control system and a method thereof. In the past, it was used as telemetering or telecontrol, and in recent years, it has been used as a center for monitoring and control, management, security, etc. for various facilities and equipment, buildings, general houses, etc. in remote places. Supervisory control is positioned as one of the important control technologies.

[0002] The present invention can be applied to any of the above-mentioned monitoring and control objects. Among them, various facilities or equipments, such as broadcasting power facilities or equipments at broadcasting stations scattered all over Japan, are used. The description will be made as an example of one monitoring control target. Monitoring, control, operation, and maintenance and inspection of such broadcasting power facilities or equipment (hereinafter, also simply referred to as power facilities) should be originally performed in each region where they are installed. However, the so-called highly skilled personnel who can always perform the monitoring and control appropriately and accurately have been particularly short in recent years, and some measures are desired in order to ensure the provision of a reliable broadcasting service. . Here, the remote monitoring control is one of extremely effective countermeasures. In other words, a remote monitoring and control system is used in which a plurality of distant broadcasting power facilities are intensively monitored and controlled by a particularly skilled operator from a center (there may be a plurality).

Hereinafter, such a remote monitoring control method will be described in detail.

[0004]

2. Description of the Related Art In a conventional remote monitoring and control system, when monitoring and controlling power equipment from a distance, various status information on the power equipment is held in a monitoring control subsystem on the site side (power equipment side). Not only that, it is also stored in the monitoring and control main system on the center side.

[0005] As described above, on the premise that the system on the site side and the system on the center side have the same state information in advance, only the change of the state information on the site side is sequentially shortened by a short message. For example, the data is transferred to the center via a dedicated line. Also, the center transmits the instruction for monitoring and control to the site in a short message via the dedicated line.
For this reason, the same information source is shared between the site and the center, and the same software as the site-specific software required for the supervisory control process is also held at the center. As described above, the conventional method is to construct a monitoring and control system equivalent to the site side virtually on the center side and to perform remote monitoring and control.

[0006]

According to the above-mentioned conventional remote monitoring and control system, the following two problems occur. First
If there are multiple on-site power facilities to be monitored remotely,
There is a problem that a monitoring control program corresponding to the number of these sites must be prepared individually at the center side. This is because the configuration and operation of the power facilities on the site vary depending on the circumstances of each site, and a common monitoring and control program cannot be adopted for all sites.

Second, in connection with the first problem, if any change or improvement is to be made to any of the monitoring and control systems on the site side, the change or improvement is directly applied to the center side. The problem has to be reflected in the monitoring and control system, which makes the version upgrade work on the center side considerably complicated. Therefore, in view of the above problems, the object of the present invention is that it is not necessary for the center to have a monitoring control program for each site, and that the center is not required to change the monitoring control program or the configuration of the power equipment at each site. It is an object of the present invention to provide a remote monitoring control method and a method thereof that require no awareness at all and have high real-time properties.

[0008]

FIG. 1 is a diagram showing a basic configuration of a remote monitoring control system according to the present invention. In FIG. 1, reference numeral 1 is a site-side monitoring and control system, 2 is a site-side information holding unit, 3 is a communication unit, and 4 is a client-side terminal. The remote monitoring and control system of the present invention basically includes at least one site-side monitoring and control system that independently manages various facilities or devices to be monitored and controlled, and monitors the various facilities or devices from a distance. This is a remote monitoring control method that includes at least one client terminal 4 for controlling and performs remote monitoring control.

In the above, the site-side information holding means 2 comprises:
It is added to the site-side monitoring and control system 1 and holds state information on each of the electric power facilities or devices while sequentially updating them. The communication unit 3 downloads the site information from the site information holding unit 2 in response to an access request from the client terminal 4, and performs monitoring control according to the downloaded site information from the client terminal 4. The instruction is transferred to the site-side monitoring and control system 1 for the above-mentioned management.

Preferably, in the present invention, the communication means 3 comprises multimedia access means capable of transferring a large amount of graphical data at high speed. FIG. 2 is a flowchart showing the remote monitoring control method according to the present invention. In this figure, in a first step S1, in response to an access request, an operable point is extracted from operation information of a corresponding site, and at the same time, a client terminal 4 of the client terminal 4 is transmitted from the site monitoring / control system 1 by multimedia access means. The layout of the power equipment or equipment on the site side to be monitored and controlled is graphically displayed on the display unit.

In the second step S2, the notation in the above-mentioned layout representing the operation target of the power equipment or the equipment is
Click operation to change to the desired operation state. Preferably, a third step is provided, and if a password is set for the point, the password is required. In the fourth step, the operation information specified by the above-mentioned click operation, for example, ON / OFF or ON / OFF of the operation target
The off-state information is transferred to the site-side monitoring and control system 1 by the multimedia access means.

According to the remote monitoring control of the present invention shown in FIGS. 1 and 2, the client terminal 4 such as a personal computer
First accesses and connects to the site-side monitoring and control system 1 via a LAN, WAN, the Internet, or the like. Then, the site-side monitoring and control system 1 transmits the layout of the power equipment or devices under the control (for example, broadcast power equipment in various places) to the client terminal 4, and the client terminal 4 displays the layout screen on a personal computer or the like. Is displayed on the display unit. In the case of the above-mentioned broadcasting power equipment, for example, the ON state of a circuit breaker or the like, the voltage, current, power, power factor, and the like are displayed in a graphical format.

In this graphical display, the operation state (ON / OFF) of the circuit breaker or the like is represented by the operation operation symbol in the layout. In addition, ON / OFF of the push button switch is also represented by a symbol representing this. The operator who operates the client-side terminal 4 can change to the desired operation state simply by clicking the above-mentioned various notations.

The supervisory control instruction is immediately transmitted to the site-side supervisory control system 1 to perform a desired operation on the device or the like. As a result, the point of the present invention is that the site-side status control information required for remote monitoring control is held in the site-side monitoring control system 1 and the status information is downloaded each time in response to an access request from the client-side terminal 4. The point is that monitoring and control from a distance can be executed as if the center-side operator is operating at the site.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 3 is a diagram schematically showing an entire remote monitoring control system according to the present invention. In FIG. 3, for example, two site-side monitoring and control systems 1 are specifically shown on the left side. In the figure, a workstation (11) and a PLC (Pro
Grammable Logic Control
r) 13 is shown. This PLC 13 is a so-called P
An I / O (Peripheral I / O) sequencer that exchanges status information of the monitored and controlled object 14, that is, the above-described power equipment or equipment.

On the other hand, on the right side of the figure, the above-mentioned client side terminal 4 which forms the center side (not limited to one) is specifically shown. A personal computer 16 is shown. DIS in the figure is the display unit described above.
Thus, in the method of the present invention, a general-purpose general-purpose personal computer is sufficient as a terminal on the client side (center side).

Further, in this figure, the LAN / WAN 17 and multimedia access means (not shown) located at both ends of the LAN / WAN 17 are employed as the communication means 3 described above.
In the embodiment of the present invention, the remote monitoring and control system first has WW
The feature is that a W (World Wide Web) server is employed. This WWW server reflects all the information on the site side. And on the center side, the WWW
A WWW browser for enabling transparent cooperation with the server is arranged. That is, a WWW server as a preferred example of the multimedia access means described above,
Then, a WWW browser is employed.

After all, the multimedia access means is constituted by a pair of a WWW server included in the site-side monitoring and control system 1 and a WWW browser incorporated in the client-side terminal 4. That is, a multimedia access means (communication means 3) is constituted by the pair of the WWW server and the WWW browser and a high-speed transmission path such as the LAN / WAN17.

FIG. 4 is a diagram for simply explaining the multimedia access means. A main part of the multimedia access means described above is a WWW server 21 included in the site-side monitoring and control system 1 and a WWW browser 22 that is paired with the WWW server 21 and is incorporated in the client-side terminal 4. When the well-known HTML format data is sent from the WWW server 21 to the WWW browser 22, the WWW server receives the data.
The browser 22 interprets the HTML data and executes a predetermined process. The WWW browser is indispensable software on the Internet.

FIG. 5 is a diagram more specifically showing the remote monitoring and control system according to the present invention. In particular, FIG. 4 is a diagram showing the existence of components to be interposed between the monitoring and control system 1 and the WWW server 21. It is. FIG. 5 shows, as a whole, a monitoring and control object 14 at the upper right in the figure, a site-side monitoring and control system 1 for transmitting and receiving state information via the previously described P / I / O sequencer (PLC 13), and a multimedia access system. Means (communication means 3) and a client terminal 4 incorporating a WWW browser 22 which is a part of the multimedia access means.

A particularly notable part of the above is the WWW communication program unit 23 constituting an interface with the WWW server 21 in the site-side monitoring and control system 1. The program section 23 plays an important role as an intermediary between the local site-side monitoring and control system 1 and the remote client-side terminal 4. That is, according to the present invention, the W
It is also characterized by having the WW communication program unit 23.

As described above, in FIG. 5, the WWW server 21 and the CGI (Common Gateway In
The WWW communication program unit 23 comprising a group of programs is the core software that plays a central role in the present invention. These software realize a remote monitoring control function by the WWW browser 22. On the other hand, in the site-side monitoring and control system 1, various configurations can be considered as an intermediary between the WWW communication program unit 23 and the monitoring and control target 14, and FIG. 5 shows an example of such a configuration. . That is, the site-side monitoring and control system 1 stores a process I / O processing program unit 31 for computer-managing the monitoring and control target 14 such as power equipment or equipment, and status information on each of the power equipment or equipment. Process state database (D
B) 32, a display / controller for displaying the status information on the site side and controlling the operation of monitoring and control by the site-side operator.
At least an operation control program unit 33 is provided.

As a further supplement, the process I / O processing program unit 31 controls the input and output of operation signals and status signals with the process. The display / operation control program unit 33 includes a local operator console, a CRT
(Display unit DIS).

The process status DB 32 stores status information of a process to be monitored and controlled, parameter information for a control algorithm executed with reference to the status information, display conditions, and the like, as well as operation history and data measurement history. . The outline of the operation of each software is as follows. I. Input / output processing by the process I / O processing program unit 31. The process I / O processing program unit 31 includes status information of a process to be monitored and controlled, an on / off state of a contact,
The current value, voltage value, and the like are constantly monitored, and the monitoring results are stored in the process state DB 32 (monitoring and recording of input data). The process I / O processing program unit 31 performs a predetermined output operation based on the contents of the process state DB in accordance with a predetermined control algorithm (on / off of a control contact, change of an analog output value). II. Graphical display processing of the process status on the display unit DIS (CRT). The display / operation control program unit 33 stores the process state D
When the change in the data in B32 is notified, the process state is graphically displayed according to the preset display parameter setting values. It also displays warning messages (automatic display of process state changes, warning display). The display / operation control program unit 33 rewrites the contents of the process state DB 32 when switching the graphical screen or performing a predetermined input / output operation in accordance with an operation instruction input from the operator console. It is transmitted to the / O processing program unit 31 (display switching by the operator console, operation command processing). The display / operation control program unit 33 displays operation history, measurement history data, and the like stored in the process status DB 32 in a graphical display format including a form format display in accordance with an instruction from the operator console (operation history, measurement history Record display). The display / operation control program unit 33 has a processing function for changing parameters for display and control stored in the process state DB 32 in addition to the above. The parameter change function is excluded from the remote operation function via the WWW server 21 (however, the parameter contents can be referred to).

Here, the main points of the system of the present invention are summarized as follows. The system of the present invention incorporates a WWW server function into a conventional remote monitoring and control system, and stores various states of power equipment and the like, for example, a closed state of a circuit breaker and the like, a voltage, a current, a power, a power factor, and the like. It is configured so that it can be stored in a graphical display format above.

Further, a symbol for an operation operation of a power facility or the like to be monitored and controlled, for example, a mark of a push button switch, etc., can be graphically set on the WWW server 21. When monitoring and controlling the power equipment or the like from a distant (center), the operator needs to use a normal WWW server 2
Using a client-side system equipped with a WWW browser 22 which is a software system for WWW access, a user accesses a WWW page (homepage) for power monitoring or the like. This is literally going to peep, and as a result, WWW
All the contents of the page that contains the necessary information on the server 21 are W
The content is downloaded to the WW browser 22, and its contents are graphically displayed on a client-side system located far away from the site.

If any control operation by the center-side operator is required, for example, an operation such as turning on / off a capacitor for improving the power factor, the operator is required to operate W
An operation mark on the WW page, for example, a push button switch is selected, and an ON or OFF operation is instructed. This operation signal is transmitted to the WWW server 21 via the WWW browser 22, further transmitted to the control signal control processing program used in the site-side monitoring and control system 1, and the on / off operation of the capacitor is performed. The result of the on / off operation is immediately reflected on the status display of the WWW page in the WWW server 21, and the remote (center side) WWW
The operation can be immediately confirmed by the operator on the browser 22.

Among the points of the present invention described above, there are two points that should be particularly noticed. First, the downloaded site-side information is screen information indicating the layout of power equipment or equipment, and In the layout, notation indicating the state of operation of the power equipment or equipment is included. Secondly, a monitoring control instruction from the client terminal 4 is performed by directly clicking on the notation in the layout.

FIG. 6 is a diagram showing a detailed example of the WWW communication program section 23 according to the present invention. However, it is shown as a control flowchart. In the figure, the WWW communication program unit 23
An image processing program unit 41 and an operation request processing program unit 42 constitute the main parts of the system, and an access request analysis program unit 43 and a general information request processing program unit 44 as auxiliary parts. For convenience of explanation of the control flow, the WWW server 21, the process I / O processing program unit 31, the process state DB 32, and the display / operation control program unit 33 already described with reference to FIG.
Are also included in the WWW communication program unit 23.

As described above, the WWW communication program unit 2
Reference numeral 3 includes an access request analysis program unit 43 which analyzes an access request from the client terminal 4 when the access request is received. In addition, the WWW communication program unit 23 includes an image processing program unit 41 that executes the image processing when the access request from the client terminal 4 requests to display the graphical image data.

Further, when the access request from the client terminal 4 requests the power equipment or the equipment (14) to perform an operation, the WWW communication program unit 23 performs an operation request for executing the operation processing. A processing program unit 42 is included. Further, the WWW communication program unit 23 determines whether the access request is an operation history or a measurement history for the power equipment or the equipment (14),
When a request is made to display general information such as the contents of various parameters set in the power equipment or the equipment, the general information request processing program unit 44 for executing the display processing is included.

Hereinafter, the control flow shown in FIG. 6 will be described in detail. That is, the local monitoring control program (1) described above and the WWW browser 22 located at a remote location (4)
The flow of the operation of the WWW communication program unit 23 and the WWW server 21 that enables the monitoring and control of the local system (1) will be described. All exchanges with the WWW browser 22 are performed using a WWW page (homepage) on the WWW server 21 as an intermediary. This WWW
The software that controls communication with the browser 22 is as follows. In addition, ,, ... in FIG.
... respectively.

The display and operation requests transmitted from the client terminal (browser) 4 via a user program activation service (CGI), which is one of the service functions of the WWW server 21, are analyzed, and each processing program is analyzed. to start. This is the access request analysis processing program section 4.
According to 3. Upon receiving a process status graphical display request from the client side terminal (browser) 4, a WWW page including an appropriate image display is generated, and the WWW server 21.
Performs processing for writing to. This is performed by the image processing program unit 41.

Upon receiving a process control command from the client side terminal (browser) 4, the control operation is executed.
Generate a WWW page to display this execution result,
A process for writing to the WWW server 21 is performed. This is performed by the operation request processing program unit 42. The client terminal (browser) 14 processes display requests for general information such as the operation history and measurement history of the system and the contents of various parameters set in the system. This is performed by the general information request processing program unit 44.

A predetermined WWW page is transmitted to the client-side terminal (browser) 14, an operation request from the WWW page is received, and transmitted to a user program. This is performed by the WWW server 21 having such a function (CGI). The WWW server 21 has a client terminal 4
A semi-finished WWW page data so-called template (CGI mainly described in HTML) for graphically displaying the current status of the process in response to a request from
Files) are also stored.

As a supplementary note, the access request analysis processing program unit 43 includes a user program activation request service function (CG) supported by the WWW server 21.
Client-side terminal 4 transmitted using I)
And analyzes various processing requests from the server, and activates corresponding request processing programs. Supplementing the image processing program section 41, the image processing program section 41 which has received the graphical display request performs the following processing (i),
Perform (ii) and (iii).

(I) In the local system (1), the CR
When a request for graphical display of the process state is issued to T, a program for processing the display request is requested to generate the requested graphical image. (Ii) A process status DB in the local system (1) is added to the image of the graphical screen generated by the above (i).
Then, the process status data recorded on the P.32 is written.

(Iii) The completed process status display screen is
The information is written in the WWW server 21 and displayed on the client terminal (browser) 4. Supplementing the operation request processing program section 42, the operation request processing program performs the following processes (i) and (ii). (I) Request a control operation from a process I / O processing program of the local system according to a process operation request received from the client terminal 4.

(Ii) After confirming that the control operation has been completed, the image processing program unit 41 is started, a status screen of the process after the operation is completed is generated and written in the WWW server 21, and the client side terminal (browser) 4 can be displayed on the display unit DIS. Furthermore, supplementing the general information request processing program section 44, the general information request processing program section 44
The following processes (i), (ii) and (iii) are performed.

(I) Analyze the request for general information transmitted from the client terminal 4 and obtain history data and display parameter data in accordance with the request by controlling display / operation of the local system (1). Request is made to the program unit 33 (FIG. 5). (Ii) the acquired history data and parameter data are
Edit to W page format.

(Iii) The completed WWW page is written in the WWW server 21 and the client terminal (browser) 4
Can be displayed on the display unit DIS.
FIG. 7 is a diagram showing a specific example of the site-side monitoring and control system in FIG. In the figure, a WWW server 21 arranged on the center side of the site-side monitoring and control system 1 is shown in the upper right of the figure, and the monitoring and control target placed under the system 1 is located at the lower end of the figure. This is shown as reference numeral 14.

The core workstation (RS / 6)
000) 11 and a PLC 13 (PI / O sequence) are connected by a common bus (Ethernet) 12,
The LC 13 is connected to power equipment or equipment (14) via a field operation panel and an interface panel. In addition, an interface board for self-generation, a printer, and the like are connected to the common bus 12.

In this embodiment, a 10 Mbps LAN is used as the transmission path 17 of the communication means 3 shown at the upper right of FIG. Finally, the personal computer (1
Some examples of patterns displayed on the display unit DIS of (5, 16) will be introduced. FIG. 8 is a first display example and is a diagram showing a layout of a power facility. Various capacitor panels, various transformer panels, various circuit breaker panels, and the like are indicated by symbols (symbols), and the current values of the current R, S, and T phases [A] are also displayed.

FIG. 9A shows a second display example, FIG. 9B shows a third display example, and FIG. 9C shows a fourth display example.
A menu is shown in the upper column of each of (A), (B) and (C). Note that this menu is common to all display screens, and the description thereof is omitted in some drawings for the sake of space. FIG. 9A is an input screen for an authentication password. An operator who intends to operate a power facility or the like on site must be an authorized person authenticated by a password.

FIG. 9B is a screen showing the operation / stop of the in-house power generation. Clicking on “operation” activates the in-house power generation device. FIG. 9 (C) is a screen when performing periodic maintenance on the power generator 1 and shows the date of execution. FIG. 10 is a diagram showing a fifth display example, and is a screen showing the result of measuring the current of the power receiving panel-1 with the passage of time. Actually, graphs of the respective current values of the R, S and T phases are displayed in different colors.

FIG. 11 is a view showing a sixth display example, and is a screen showing a history of failures and operations in a table format. FIG. 12 is a diagram showing a seventh display example, which is a menu on the equipment screen. For example, by clicking "2" at the left end in the figure, various graphical displays relating to the high-pressure facility can be selected.

FIG. 13 is a view showing an eighth display example, and is a screen corresponding to FIG. 10 and showing the result of measuring the voltage of the power receiving board-1 with the passage of time. Actually R, S and T
The graph of each voltage value of the phase is displayed in each color.

[0048]

As described in detail above, the following two advantages (i) and (ii) are obtained by the remote monitoring control method or method according to the present invention. (I) All monitoring control information of the site-side monitoring and control system 1 is held in the site WWW server 21. Therefore, even if there are a plurality of monitoring control objects 14, the client terminal 4
Can be basically handled only by the standard WWW browser 22.

(Ii) Since all the states of the monitoring control object 14 at the site are stored in the WWW server 21 at the site,
Even if a change is made to the on-site monitoring and control system 1, the response is immediately completed only by reflecting the change on the WWW server 21 on the on-site side. Therefore, unlike the conventional system, there is no need to modify or rework the system on both the center side and the site side.

[Brief description of the drawings]

FIG. 1 is a diagram showing a basic configuration of a remote monitoring control system according to the present invention.

FIG. 2 is a flowchart illustrating a remote monitoring control method according to the present invention.

FIG. 3 is a diagram schematically showing an entire remote monitoring control system according to the present invention.

FIG. 4 is a diagram for simply explaining a multimedia access unit.

FIG. 5 is a diagram more specifically showing a remote monitoring control method according to the present invention.

FIG. 6 is a diagram showing a detailed example of a WWW communication program unit 23 according to the present invention.

FIG. 7 is a diagram showing a specific example of a site-side monitoring and control system in FIG. 3;

FIG. 8 is a first display example showing a layout of a power facility.

9A is a diagram illustrating a second display example, FIG. 9B is a diagram illustrating a third display example, and FIG. 9C is a diagram illustrating a fourth display example.

FIG. 10 is a diagram showing a fifth display example.

FIG. 11 is a diagram showing a sixth display example.

FIG. 12 is a diagram showing a seventh display example.

FIG. 13 is a diagram showing an eighth display example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Site monitoring and control system 2 ... Site information storage means 3 ... Communication means 4 ... Client terminal 11 ... Workstation 12 ... Common bus 13 ... PLC 14 ... Monitoring and control target 15 ... Desktop personal computer 16 ... Notebook personal computer 17 ... LAN / WAN 21 WWW server 22 WWW browser 23 WWW communication program unit 31 Process I / O processing program unit 32 Process state database (DB) 33 Display / operation control program unit 41 Image processing program unit 42 Operation Request processing program section 43 Access request analysis program section 44 General information request processing program section

Claims (10)

[Claims] At least one site-side monitoring and control system for independently managing various facilities or devices to be monitored and controlled, and at least one client-side terminal for monitoring and controlling the various facilities or devices from a distance. Has,
In a remote monitoring control method for performing remote monitoring control, a site-side information holding unit that is included in the site-side monitoring control system and holds status information about each of the various facilities or devices while sequentially updating the status information, and the client-side terminal In response to an access request from the client, the site information is downloaded from the site information holding means, and a monitoring control instruction corresponding to the downloaded site information is transferred from the client terminal to the site monitoring control system. Communication means for performing remote monitoring and control. 2. The remote monitoring control system according to claim 1, wherein said communication means comprises a pair of a WWW server included in said site-side monitoring and control system and a WWW browser incorporated in said client-side terminal. 3. The monitoring and control system according to claim 1, wherein
2. The remote monitoring control system according to claim 1, further comprising a server and a WWW communication program unit that configures an interface with the WWW server. 4. The on-site monitoring and control system includes a WWW server included in the on-site monitoring and control system and a WWW browser incorporated in the client-side terminal. A WWW communication program unit which forms an interface with the computer, a process I / O processing program unit for computer-managing the various facilities or devices, etc., and a process status database storing status information on each of the various facilities or devices, etc. 2. The remote monitoring control system according to claim 1, further comprising: a display / operation control program unit for displaying the status information on the site side and performing a monitoring control operation by the site side operator. 5. The remote monitoring control system according to claim 3, wherein said WWW communication program section includes an access request analysis program section which analyzes an access request from said client terminal when the access request is made. 6. The WWW communication program section includes an image processing program section that executes the image processing when an access request from the client side terminal is a request to display graphical image data. 3. The remote monitoring control method according to 3. 7. An operation request process for executing the operation process when an access request from the client side terminal requests an operation to the various facilities or devices, etc. The remote monitoring control method according to claim 3, further comprising a program unit. 8. The WWW communication program section stores general information such as an operation history or a measurement history of the access request for the various facilities or devices, and contents of various parameters set in the various facilities or devices. 4. The remote monitoring control method according to claim 3, further comprising a general information request processing program unit that executes the display processing when the display is requested. 9. The downloaded site-side information indicates a layout of the various facilities or devices, and includes a notation indicating an operation state of the various facilities or devices in the layout. 2. The remote monitoring control method according to claim 1, wherein the monitoring control instruction from the client side terminal is performed by directly clicking the notation in the layout. 10. At least one site-side monitoring and control system that independently manages various facilities or devices to be monitored and controlled, and at least one client-side terminal that monitors and controls the various facilities or devices from a distance. A remote monitoring control method for performing remote monitoring control, wherein the monitoring control is performed on the display unit of the client terminal by a communication unit from the site monitoring control system in response to an access request from the client terminal. A first step of graphically displaying the layout of the various facilities or devices, etc. to be subjected to the above, and a click operation to change the notation in the layout representing the operation state of the various facilities or devices to a desired operation state A second step, wherein the operation information designated by the click operation is transmitted to the communication unit. A third step of transferring the data to the site-side monitoring and control system.