JP2003167801A - Remote monitoring controlling system and recording medium used in the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a remote monitoring controlling system wherein an agent has a security function and a transmission assuring function, a monitor control apparatus does not need an apparatus of high performance, and the agent can be applied to the wide-area network. <P>SOLUTION: A user starts the agent 16 provided with the security function by a monitoring controlling terminal 11 connected to the wide-area network 14, and a lightweight agent 17 not having the security function and the transmission assuring function is generated by a server (gateway server) 12 connected to the wide-area network 14 by utilizing the agent 16 moving the wide-area network 14. The lightweight agent 17 is connected to the wide-area network 14 through the server 12, and further a local network 15 connected to a monitoring controlling apparatus 13 is moved to perform the monitoring controlling processing of the monitoring controlling apparatus. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring control system using a mobile agent and a recording medium used for the system.

[0002]

2. Description of the Related Art A remote monitoring and control system is a system for realizing monitoring and control of various equipment such as a plant located in a remote place through a computer network, and it is possible to collect plants distributed in various places from one place. Since it is possible to monitor and control the plant and the like, there is an advantage that the number of maintenance personnel for monitoring and controlling the plant and the like can be reduced and the maintenance cost of the plant and the like can be reduced.

FIG. 7 is a block diagram showing a conventional remote monitoring control system. As shown in FIG.
1 directly communicates with a supervisory control device 22 to be monitored and controlled in a remote plant via a network 23 via a client-server system, and executes a program 24 for supervisory control installed in the supervisory control device 22. By doing so, the processing is performed.

Conventionally, the specification change of the supervisory control and the program 2
When the program 24 needs to be updated due to the problem of 4 or the like, it is necessary to replace the program 24 of the monitoring control device 22 which is the target of all monitoring control.
Since there are a large number of supervisory control devices 22 and they are located in a remote place, there is a problem that the maintenance cost of the remote supervisory control system itself becomes very high.

In response to the above problem, a supervisory control system using an agent has been proposed instead of the client-server method. The agent has autonomy and can perform supervisory control on behalf of a user (observer), and a software module technology of a supervisory control system using this method is drawing attention. Since the program itself moves in the agent, it is not necessary to replace the program of each device due to a specification change or a defect, and maintenance costs can be reduced.

Further, with the development of the Internet, there are attempts to use a wide area network such as the Internet in the field of monitoring and control. By using the wide area network, it is not necessary to construct a dedicated communication network between the monitoring terminal and the monitoring control equipment, and the construction and operating cost of the monitoring control system can be greatly reduced.

In order to apply an agent in a wide area network such as the Internet, it is necessary to ensure the security of the agent and, further, to ensure the transmission of the agent to the destination device when the agent moves. In addition, a process restart function is required in case the device terminates normally or abnormally while the agent is running.

An example of the agent having a security function is a security system described in Japanese Patent Laid-Open No. 10-269186. In this method, the agent moves with the security module.

[0009]

As described above, when constructing a remote monitoring and control system to which an agent is applied in a wide area network, it is necessary to mount a security function and a transmission guarantee function on the agent. , The agent itself needs to carry the security module, and it is necessary to perform security processing or execute the transmission guarantee function on all the devices to which the agent moves.

However, there are many monitoring control devices to be subjected to remote monitoring control, such as built-in devices, which do not have high information processing capability, and which have a small memory or disk space resource. There is a problem that it may be difficult to execute the function.

On the other hand, when a high-performance device is used to perform the security processing or the transmission guarantee function, the cost of the system including the remote monitoring control system and the plant becomes high.

The present invention has been made in order to solve the above problems, and requires an agent having a security function and a transmission guarantee function, and a highly functional device as a device to be monitored and controlled. It provides a remote monitoring and control system in which an agent is applied to a wide area network.

[0013]

In a remote monitoring control system according to the present invention, a user activates an agent having a security function at a monitoring control terminal connected to a wide area network, and moves the wide area network. In a remote monitoring and control system for monitoring and controlling monitoring and control equipment from a remote location using a server, the server is connected to the wide area network, and the wide area network is connected via the server, and the monitoring and control equipment is further connected. And a local network that operates in the wide area network, and the lightweight agent generation unit included in the agent that has moved inside the wide area network generates a lightweight agent having no security function in the server, and the generated lightweight agent is the local agent. Move network Te and executes the monitor control processing of supervisory control device.

After performing the monitoring control processing, the lightweight agent notifies the agent of the processing result from the server, and the agent notifies the user of the notified processing result from the monitoring control terminal.

A plurality of supervisory control devices are connected to the local network, and the lightweight agent circulates the plurality of supervisory control devices.

Further, the server has a monitor / control device list in which a plurality of monitor / control devices are recorded, and the lightweight agent refers to the monitor / control device list to determine whether or not all the monitor / control devices have been visited. .

The agent is provided with a plurality of local networks, and the agent circulates through the servers connected to the plurality of local networks.

The agent is provided with a server list recording the servers connected to a plurality of local networks, and refers to the server list to determine whether or not all the servers have been visited.

The agent also has a transmission guarantee function.

Further, the agent sequentially processes the processing results notified from the lightweight agent on the server.

The agent notifies the user of only the result obtained by processing the data through the monitor control terminal.

Further, the lightweight agent is equipped with a status flag indicating the execution status of the monitoring control processing, and the agent is equipped with a lightweight agent monitoring unit for detecting the execution status of the status flag through the local network.

Further, the lightweight agent monitoring section notifies the lightweight agent generation section of the detected inability to execute the status flag, and the agent regenerates a new lightweight agent.

The recording medium used in the remote monitoring control system according to the present invention is a recording medium used in a remote monitoring control system for monitoring and controlling monitoring control equipment from a remote location, which is activated from a monitoring control terminal and has a security function. A step in which an agent moving in a wide area network moves to a server connected to the wide area network, the agent is a local network connected to the wide area network via the server without the security function in the server. A step of generating a lightweight agent that moves the mobile network, and a step of causing the generated lightweight agent to move the local network and execute a supervisory control process of the supervisory control device connected to the local network. Program Those computer-readable recorded.

Further, the present invention is a computer readable program recorded with a program characterized in that the lightweight agent performs the step of notifying the agent of the processing result after executing the monitoring control processing.

Further, the lightweight agent is a computer-readable program recorded with a program characterized by performing a step of patrol a plurality of supervisory control devices in execution of supervisory control processing.

Further, the light-weight agent is recorded with a program characterized by determining whether or not all the supervisory control devices have been visited by referring to the supervisory control device list of the server in which a plurality of supervisory control devices are recorded. It is computer readable.

Further, the agent is a computer-readable program having a program recorded thereon, characterized in that, in the step of generating the lightweight agent, the agent performs a step of patrol a server connected to a plurality of local networks.

The agent is a computer readable program recorded with a program characterized by determining whether or not all the servers have been visited by referring to a server list recording the servers connected to a plurality of local networks. is there.

Further, the agent is a computer readable program in which a program characterized by performing a transmission guarantee function is recorded.

The agent is a computer-readable medium in which a program is recorded in which the agent sequentially performs the data processing step on the server of the processing result notified from the lightweight agent.

The agent is a computer-readable medium having a program recorded thereon, which is characterized in that the agent carries out only the result obtained by the data processing to bring it back to the supervisory control terminal.

Further, the lightweight agent represents the execution state of the supervisory control processing by a state flag, and the agent performs the step of detecting the execution state of the state flag through the local network. It is possible.

Further, the agent is a computer readable program recorded with a program characterized by performing a step of regenerating a new lightweight agent in response to the detected inability to execute the status flag.

The program according to the present invention is a program used in a remote monitoring control system for monitoring and controlling a monitoring control device from a remote location, and an agent which is activated from a monitoring control terminal, has a security function, and moves over a wide area network, Moving to a server connected to the wide area network, wherein the agent generates a lightweight agent that does not have the security function and moves through the server to a local network connected to the wide area network. The step and the generated lightweight agent cause the computer to execute the step of moving the local network and executing the supervisory control processing of the supervisory control device connected to the local network.

Further, after executing the monitoring control processing, the lightweight agent causes the computer to execute the step of notifying the agent of the processing result from the server.

In addition, the lightweight agent causes the computer to execute a step of patrol a plurality of monitoring control devices in the execution of the monitoring control processing.

Further, the lightweight agent causes the computer to execute the step of determining whether or not all the monitoring control devices have been visited by referring to the monitoring control device list of the server in which a plurality of monitoring control devices are recorded.

Further, the agent causes the computer to execute a step of patrol a server connected to a plurality of local networks in the step of generating the lightweight agent.

The agent causes the computer to execute the step of determining whether or not all the servers have been visited by referring to the server list recording the servers connected to the plurality of local networks.

The agent causes the computer to execute the step of performing the transmission guarantee function.

Also, the agent causes the computer to execute the step of sequentially processing the processing results notified from the lightweight agent on the server.

The agent causes the computer to execute the step of bringing back only the result obtained by the data processing to the monitor control terminal.

Further, the lightweight agent represents the execution state of the monitoring control processing by a state flag, and the agent causes the computer to execute the step of detecting the execution state of the state flag through the local network.

Further, the agent causes the computer to execute the step of regenerating a new lightweight agent in response to the detected unexecutable state of the state flag.

[0046]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. Embodiment 1. 1 is a configuration diagram showing a first embodiment of a remote monitoring and controlling system of the present invention. In the figure, 11 is a supervisory control terminal, 12 is a server (gateway server), 13 is a supervisory control device to be subject to supervisory control, and the supervisory control device 13 executes supervisory control on an embedded server device. Have a program of. Reference numeral 14 is a wide area network, and the supervisory control terminal 11 and the server 12 are connected by the wide area network 14.

Reference numeral 15 is a local network, 16 is an agent, 17 is a lightweight agent, and the local network 15 is a local network for performing upward transmission and reception to the monitoring and control equipment 13. The agent 16 moves on the wide area network 14, and the lightweight agent 17 moves on the local network 15.

The agent 16 has a security function, and the lightweight agent 17 is lightened by deleting a function such as a security function which is not necessary for moving on the local network 15.

The agent is further provided with a transmission guarantee function so that it can be reliably delivered to the destination device.

Reference numeral 18 is a firewall for ensuring the security of the local network 15 such as preventing others from entering the local network 15 from the wide area network 14.

FIG. 2 is a flow chart for explaining the operation of this embodiment. Based on the figure, the operation will be described below with reference to FIG.

The user activates the agent 16 on the supervisory control terminal 11 through application software or the like, and notifies the agent 16 of the supervisory control request of the supervisory control device 13 (S31).

The agent 16 is the wide area network 14
To move to the server 12 (S32). At this time, the agent 16 has a security function necessary for moving in the wide area network 14, so that the agent 16 can safely move in the wide area network 14.

Next, the agent 16 that has moved to the server 12 does not have a security function and does not have the security function.
Lightweight agent 1 with functions required for processing in
7 is created, and the request received from the monitor control terminal 11 is notified to the lightweight agent 17 (S33).

The lightweight agent 17 that has received the notification moves to the supervisory control device 13 using the local network 15 (S34) and executes the supervisory control processing request (S3).
5). At this time, the lightweight agent 17 is the monitoring control device 1
3 is sequentially circulated, and each supervisory control device 13 makes a request for supervisory control processing.

Further, when it is necessary to bring back the processing result to the monitor control terminal 11, the lightweight agent 17
The processing result copied by the monitoring control device 13 to its own memory is brought back to the server 12 (S36), the processing result is notified to the agent 16 (S37), and the agent 16 receiving the processing result sends the processing result to the monitoring control terminal 11. Bring back (S38).

As described above, the server 12 is used to divide the space between the supervisory control terminal 11 and the supervisory control equipment 13 into two types of networks, the wide area network 14 and the local network 15, and the security function and transmission are performed in the wide area network 14. The agent 16 having functions necessary for various movements such as a guarantee function is used, and the functions not required for movement such as the security function and the transmission guarantee function in the local network 15 are not provided. By using the lightweight agent 17 that he has, the high-performance monitoring and control device 13 is not required.

Further, since the lightweight agent 17 does not need a security function, a transmission guarantee function, etc., and only needs to have a supervisory control function, the module size of the lightweight agent 17 is directly monitored by the agent 16 via a wide area network. The size can be made smaller than the case of moving to the control device 13, and the cost of constructing the monitoring control system can be reduced.

The program for causing the computer to execute the steps S31 to S38 is recorded in a recording medium such as a CDROM.

Embodiment 2. In the above-described first embodiment, the case where the agent 16 is activated every time for the server 12 for each monitoring control request has been described.
Is a local network 1 with multiple agents 16
5 sequentially visits the servers 12 connected to each other to execute processing one after another, thereby reducing the communication processing of the monitoring control terminal 11, and further between the monitoring control equipments 13 connected to different local networks 15. It is possible to exchange information and realize a linking function with.

FIG. 3 is a block diagram showing the second embodiment of the remote monitoring control system of the present invention. In the figure, the same reference numerals as those in FIG. 1 indicate the same or corresponding portions.

As shown in the figure, the wide area network 14
Connect multiple local networks 15 to the server 1
The server list 19 which is the second list is displayed on the monitor control terminal 11
The server 12 is provided with a monitoring control device list 20 which is provided above and records the monitoring control devices 13 connected to the local network 15.

FIG. 4 is a flow chart for explaining the operation of this embodiment. Based on the figure, the operation will be described below with reference to FIG.

The user activates the agent 16 on the supervisory control terminal 11 through application software or the like, and notifies the agent 16 of the supervisory control request of the supervisory control device 13 (S31).

The agent 16 copies the server list 19 of the supervisory control terminal 11 to the memory of the agent 16 (S41) and moves to the server 12 described first in the server list 19 using the wide area network 14 (S3).
2) The server 12 generates the lightweight agent 17 and notifies the lightweight agent 17 of the request received from the monitoring control terminal 11 (S33). At this time, as in the first embodiment, the agent 16 has a security function necessary for safely moving the wide area network 14, and further has a transmission guarantee function, and the lightweight agent 17 has a local security function and a transmission guarantee function. Network 15
It does not have a function that is not required to move, but has a function that is necessary for processing in the monitoring and control device 13.

The lightweight agent 17 that has received the notification sets the monitoring control list 20 on the server 12 to the lightweight agent 1
7 is copied to the memory (S42), and moved to the monitor control device 13 using the local network 15 (S3).
4), a request for monitoring control or the like is executed (S35).

When the processing is completed, the lightweight agent 17 determines whether or not the processing is completed for all of the monitoring and controlling equipments 13 connected to the local network 15, by referring to the monitoring and controlling equipment list 20. (S4
4) If not completed, the process returns to S34 and moves to another monitoring control device 13. If the processing has been completed for all of the monitoring and control devices 13, the process moves to the server 12 (S3
6), notify the agent 16 of the processing result (S3)
7).

Agent 16 that received the processing result
Refers to the server list 19 and determines whether or not all the servers 12 have been visited (S45).
If the process is repeated, the process result is brought back to the monitor control terminal 11 (S38) and the result is notified to the user. If the patrol has not been completed, the process moves to the next server 12 and the processes of S32 and thereafter are repeated.

According to this embodiment, the agent 16
By sequentially circulating the servers 12 connected to the plurality of local networks 15 and executing the processes one after another, the monitoring control devices 13 can be collectively monitored and controlled. Can be reduced, and for example, the number of observing personnel can be reduced to reduce the operating cost or the cost of equipment.

Further, the agent 16 can refer to the server list 19 to determine whether or not all the servers 12 have been visited, and the lightweight agent 17 refers to the supervisory control device list 20 to perform all supervisory control. It is possible to determine whether the processing of the device 13 is completed.

Further, since the agent 16 manages all the information of each monitoring control device 13 in the agent 16, it is possible to monitor and control the monitoring control device 13 across a plurality of local networks 15 according to each state. Is possible. For example, in a plant system that secures a large amount of power generated by a plurality of small generators, if a plurality of power generators within a certain local network 15 cannot secure the amount of power generated as planned due to a trouble or the like, another local network The control such as increasing the power generation amounts of the plurality of power generators in 15 and ensuring the power generation amount as planned in the entire plant can be performed without an instruction from the monitoring control terminal 11.

In addition, the above steps S31 to S38,
The program that causes the computer to execute the additional steps S41, S42, S44, and S45 is CDR.
It is recorded on a recording medium such as OM.

Third Embodiment In the above-described first and second embodiments, the agent 16 only collects the monitoring control result or the execution result of the monitoring control device 13, but in the third embodiment, the monitoring is performed while waiting for the processing result of the lightweight agent 17. The data processing of the processing result to be performed by the control terminal 11 is sequentially processed on the server 12 to reduce the data processing on the monitor control terminal 11.

Further, by allowing the agent 16 to bring back only the result of the data processing to the supervisory control terminal 11, the amount of data carried by the agent 16 is reduced, the cost of communication processing is reduced, and at the same time, the supervisory control terminal 11 can be controlled. It is intended to reduce the load and increase the number of monitor and control devices 13 that can be operated by one monitor and control terminal 11 to reduce the operating cost and equipment cost of the remote monitor and control system.

FIG. 5 is a flow chart for explaining the operation of this embodiment. Based on the figure, the operation will be described below with reference to FIGS. 1 and 3.

Similar to the first embodiment, the user activates the agent 16 on the supervisory control terminal 11 through the application software or the like, and notifies the agent 16 of the supervisory control request of the supervisory control device 13 (S31).

The agent 16 is the wide area network 1
4 to move to the server 12 (S32), the server 12
Generate a lightweight agent 17 with
The request received from the monitor control terminal 11 is notified to the server 7 (S33). At this time, as in the first embodiment, the agent 16 has various functions necessary for moving in the wide area network 14, and the lightweight agent 17 has a local network 15 such as a security function and a transmission guarantee function.
It does not have a function that is not required to move, but has a function that is necessary for processing in the monitoring and control device 13.

The lightweight agent 17 that has received the notification moves to the monitoring control device 13 using the local network 15 (S34) and executes a request for monitoring control (S3).
5) Move to the server 12 (S36) and notify the agent 16 of the processing result (S37).

The agent 16 having received the processing result from the lightweight agent 17 determines whether or not a processing request for another local network 15 has been issued by the user (S52). When there is a processing request to another local network 15, S32 and S33 are performed to generate the lightweight agent 17, and at the same time, data processing of the processing result received in the processing of the previous monitoring and control device is executed (S51).

Newly created lightweight agent 17
Performs movement to the monitoring control device 13, monitoring control processing, movement to the server 12, and notification of the processing result to the agent 16 (S34 to 37).

From user to other local network 15
The processing of S32 to S52 and the processing of S51 are repeated until there is no processing request for the above. If there is no processing request, the agent 16 returns to the monitoring control terminal 11 with the result of the data processing (S38) and notifies the user of the result. (S39).

According to this embodiment, the agent 16
However, the data processing in the monitoring control terminal 11 can be reduced by sequentially processing the processing results obtained on the server 12.

Further, since the data processing operates on different servers, the CPU and memory of the server 12 can be effectively utilized and the result of the data processing can be obtained quickly.

Further, the agent 16 is the supervisory control terminal 1
By reducing the amount of information carried in 1 to the result of data processing and reducing it, the load on the wide area network 14 can be reduced. For example, a large number of monitoring control devices 1
In the case of monitoring 3, the processing result is better than the agent 16 collecting the processing results of all the monitoring control devices 13, the result of data processing and the status information such as failure / normality and notifying the user at the monitoring control terminal. Equipment that failed,
When the agent collects the data processing result and the list of only the faulty devices and notifies the user of the monitoring control terminal, the load on the monitoring control terminal 11 can be reduced and the operation efficiency can be much improved.

In addition, the steps S31 to S38,
The program that causes the computer to execute the additional steps S39, S51, and S52 is recorded in a recording medium such as a CDROM.

Fourth Embodiment In the above-described first and second embodiments, one lightweight agent 17 circulates a plurality of supervisory control devices 13 to perform the supervisory control processing, but an abnormality occurs in the local network 15 or the supervisory control devices 13, There may be a situation where the execution of the lightweight agent 17 becomes unexecutable due to an error. That is, the agent 16 guarantees the re-execution of the agent 16 by the transmission guarantee function, but the lightweight agent 17
It is lightweight and does not have a guaranteed transmission function.

The present embodiment solves such a problem, and FIG. 6 is a configuration diagram showing the fourth embodiment.

As shown in FIG. 6, in the present embodiment, the lightweight agent 17 is provided with a status flag 71 indicating the execution state, and the agent 16 is provided with a lightweight agent monitoring unit 72 for monitoring the status of the status flag 71. The lightweight agent monitoring unit 72 reads the status of the status flag 71 through the local network 15.
Reference numeral 73 denotes a lightweight agent generation unit, which is the same as in the first to third embodiments and is used by the server 12 for the lightweight agent 1.
7 is generated. At this time, the newly created lightweight agent is executed from the monitoring control device 13 next to the inexecutable monitoring control device 13. Although the supervisory control terminal and the wide area network are omitted, their configuration is the same as in FIG. The program for executing the step of the agent 16 reading the state of the state flag 71 and the state of the state flag 71 through the local network 15 by the lightweight agent monitoring unit 72 is the program according to the first embodiment.
3 to 3 are added to the programs to be executed by the computer, and the added new programs are recorded in a recording medium such as a CDROM.

According to this embodiment, the supervisory control device 13
Alternatively, when a problem occurs in the local network 15 and the lightweight agent 17 becomes inexecutable during movement or processing, the agent 16 can detect the inexecutable state and notify the user through the monitoring control terminal 11. .

Further, the agent 16 that has detected the inability to execute the lightweight agent 17 notifies the lightweight agent generator 73 from the lightweight agent monitor 72 to regenerate the same lightweight agent 17 and re-execute the monitoring control processing. You can

Further, in the lightweight agent monitoring unit 72, the supervisory control equipment 13 which has been normally and successively processed is temporarily recorded, so that the supervisory control equipment 13 which is not recorded is found, and the supervisory control equipment not recorded is found. The device 13 can be detected as the monitoring control device 13 in which an abnormality has occurred, and the monitoring control device 13 in which this abnormality has occurred can be skipped, or the monitoring control process by the lightweight agent 17 restarted from the subsequent monitoring control device 13. You can

Embodiment 5. In the above-described first to fourth embodiments, the example in which the monitoring and control device is a server device having a built-in type has been described, but the present invention has a smaller CPU function or memory capacity than a personal computer or a server device. Also, the present invention can be applied to a device such as a disk having a small or no secondary storage device.
For example, a small mobile terminal such as a small mobile terminal (PDA), a mobile phone, an automobile terminal, and the like are included.

Instead of the monitoring control information in the above-mentioned first to fourth embodiments, for example, the customer information, daily report information, information regarding the movement record of the automobile, maintenance information, etc., which the employee has on the mobile terminal are collected remotely. By doing so, it is possible to improve the efficiency of the work and detect the failure in the initial stage.

[0094]

In the remote supervisory control system according to the present invention, the user activates the agent having the security function at the supervisory control terminal connected to the wide area network, and uses the agent moving on the wide area network. A remote supervisory control system for supervising and controlling supervisory control equipment from a remote location; a server connected to the wide area network; and a local network connected to the wide area network via the server and further connecting the supervisory control equipment. The lightweight agent generation unit included in the agent that has moved to the wide area network has a security agent that does not have a security function in the server, and the generated lightweight agent moves to the local network. The above monitoring system Since it is intended to perform supervisory control processing equipment, without the need for sophisticated equipment to monitor and control equipment, it is possible to reduce the cost of the supervisory control system configuration.

After performing the monitoring control process, the lightweight agent notifies the agent of the processing result from the server, and the agent notifies the user of the notified processing result from the monitoring control terminal. Can take appropriate action based on the agent's notification.

Further, since a plurality of supervisory control equipments are connected to the local network and the lightweight agent circulates the plurality of supervisory control equipments, the load and operation on the supervisory control terminal can be reduced.

Further, the server has a monitor / control device list in which a plurality of monitor / control devices are recorded, and the lightweight agent refers to the monitor / control device list to determine whether or not all monitor / control devices have been visited. Therefore, all monitoring and control equipment can be processed without exception.

Since the agent is provided with a plurality of local networks and circulates through the servers connected to the plurality of local networks, the load and operation on the supervisory control terminal can be reduced.

Further, the agent has a server list recording the servers connected to a plurality of local networks, and refers to the server list to determine whether or not all the servers have been visited. Can be processed without exception.

Further, since the agent has a transmission guarantee function, it can reliably reach the transfer destination.

Further, since the agent sequentially processes the processing results notified from the lightweight agent on the server, the data processing in the supervisory control terminal can be reduced.

Since the agent notifies the user of only the result obtained by processing the data through the monitor control terminal, the load on the wide area network can be reduced.

Further, since the data processing operates on different servers, the CPU and the memory of the server can be effectively utilized and the result of the data processing can be obtained quickly.

Further, since the lightweight agent has a status flag indicating the execution status of the monitoring control processing, and the agent has a lightweight agent monitoring unit for detecting the execution status of the status flag through the local network, the monitoring control device or When a trouble occurs in the local network and the lightweight agent becomes unexecutable during movement or processing, the agent can detect the inexecutable state and notify the user through the monitoring control terminal.

Further, the lightweight agent monitoring unit notifies the lightweight agent generation unit of the detected inability to execute the status flag, and the agent regenerates a new lightweight agent. Can be executed again.

The recording medium used in the remote monitoring and controlling system according to the present invention is a recording medium used in a remote monitoring and controlling system for monitoring and controlling monitoring and controlling equipment from a remote location, which is activated from a monitoring and controlling terminal and has a security function. A step in which an agent moving in a wide area network moves to a server connected to the wide area network, the agent is a local network connected to the wide area network via the server without the security function in the server. A step of generating a lightweight agent that moves the mobile network, and a step of causing the generated lightweight agent to move the local network and execute a supervisory control process of the supervisory control device connected to the local network. Program Since the recorded those computers that readable, without the need for sophisticated equipment to monitor and control equipment, it is possible to reduce the cost of the supervisory control system configuration.

Further, since the lightweight agent performs the step of notifying the agent of the processing result from the server after executing the monitoring control processing, the program is recorded on a computer readable medium, so that the user can Appropriate measures can be taken based on the notification.

In addition, since the lightweight agent is a computer readable program recorded with a program characterized by performing a step of patrol a plurality of supervisory control devices in the execution of supervisory control processing, the supervisory control terminal It is possible to reduce the load and operation.

Further, the lightweight agent is recorded with a program characterized in that it judges whether or not it has circulated all of the supervisory control devices by referring to the supervisory control device list of the server in which a plurality of supervisory control devices are recorded. Since it is computer-readable, it can handle all monitoring and control devices without exception.

Further, the agent is a computer-readable program having a recorded program characterized by performing a step of patrol a server connected to a plurality of local networks in the step of generating a lightweight agent. The load and operation on the supervisory control terminal can be reduced.

The agent is a computer readable program having a program characterized by determining whether or not all the servers have been visited by referring to a server list recording the servers connected to a plurality of local networks. As a result, it can handle all servers without exception.

Further, since the agent is a computer readable program in which a program characterized by performing a transmission guarantee function is recorded, it is possible to reliably reach the transfer destination.

Further, since the agent is a computer readable program recorded with a program characterized by sequentially performing the data processing step on the server of the processing result notified from the lightweight agent, the supervisory control terminal The data processing in can be reduced.

Further, since the agent is a computer-readable program recorded with a program characterized by performing a step of bringing back only the result obtained by the data processing to the supervisory control terminal, it is given to the wide area network. The load can be reduced.

Further, since the data processing operates on different servers, the CPU and memory of the server can be effectively utilized and the result of the data processing can be obtained quickly.

Further, the lightweight agent represents the execution state of the supervisory control process by a state flag, and the agent performs the step of detecting the execution state of the state flag through the local network. Because it is possible,
When a lightweight agent becomes unexecutable during movement or processing due to trouble in the supervisory control equipment or the local network, the agent can detect the inexecutable state and notify the user through the supervisory control terminal.

Further, the agent is a computer readable program recorded with a program characterized by performing a step of regenerating a new lightweight agent in response to the detected inability to execute the status flag. The monitoring control process can be executed again.

According to the program of the present invention, in a program used in a remote monitoring control system for monitoring and controlling a monitoring control device from a remote location, an agent that is activated from a monitoring control terminal, has a security function, and moves in a wide area network. A step of moving to a server connected to the wide area network, wherein the agent is a lightweight agent that moves in a local network connected to the wide area network via the server without having the security function in the server. The generating step, and the generated lightweight agent,
Since the computer is caused to execute the step of executing the supervisory control processing of the supervisory control equipment connected to the local network by moving the local network, the supervisory control equipment does not need a high-performance equipment, and the supervisory control The system construction cost can be reduced.

Further, after executing the monitoring control processing, the lightweight agent causes the computer to execute the step of notifying the agent of the processing result from the server. Therefore, the user must take appropriate action based on the notification of the agent. You can

Further, since the lightweight agent causes the computer to execute the step of circulating a plurality of supervisory control devices in the execution of supervisory control processing, the load and operation on the supervisory control terminal can be reduced.

Further, the lightweight agent causes the computer to execute the step of judging whether or not all the supervisory control devices have been visited by referring to the supervisory control device list of the server in which a plurality of supervisory control devices are recorded. , All monitoring and control equipment can be processed without exception.

Further, since the agent causes the computer to execute the step of circulating the servers connected to the plurality of local networks in the step of generating the lightweight agent, the load and operation on the supervisory control terminal are reduced. be able to.

Further, the agent causes the computer to execute the step of determining whether or not all the servers have been visited by referring to the server list in which the servers connected to the plurality of local networks are recorded. Can be processed without exception.

Since the agent causes the computer to execute the step of performing the transmission guarantee function,
The transfer destination can be reliably reached.

Further, since the agent causes the computer to sequentially perform the data processing step on the server of the processing result notified from the lightweight agent, the data processing in the supervisory control terminal can be reduced.

Further, since the agent causes the computer to execute the step of bringing back only the result obtained by the data processing to the monitor control terminal, it is possible to reduce the load on the wide area network.

Further, since the data processing operates on different servers, the CPU and memory of the server can be effectively utilized and the result of the data processing can be obtained quickly.

Further, since the lightweight agent represents the execution state of the monitoring control processing by the status flag, and the agent causes the computer to execute the step of detecting the execution status of the status flag through the local network, the monitoring control device or When a trouble occurs in the local network and the lightweight agent becomes unexecutable during movement or processing, the agent can detect the inexecutable state and notify the user through the monitoring control terminal.

Further, since the agent causes the computer to execute the step of newly regenerating the lightweight agent in response to the detected inability to execute the status flag, the monitoring control processing can be executed again. .

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of a remote monitoring control system of the present invention.

FIG. 2 is a flowchart for explaining the operation of the first embodiment.

FIG. 3 is a configuration diagram showing a second embodiment of a remote monitoring control system of the present invention.

FIG. 4 is a flowchart for explaining the operation of the second embodiment.

FIG. 5 is a flowchart for explaining the operation of the third embodiment.

FIG. 6 is a configuration diagram showing a fourth embodiment of a remote monitoring control system of the present invention.

FIG. 7 is a configuration diagram showing a conventional remote monitoring control system.

[Explanation of symbols]

11 supervisory control terminals, 12 servers (gateway servers), 13 supervisory control devices, 14 wide area networks,
15 local networks, 16 agents, 1
7 lightweight agents, 18 firewalls, 1
9 server list, 20 supervisory control equipment list, 71
Status flag, 72 Lightweight agent monitor, 73 Lightweight agent generator.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Fukuda             2-3 2-3 Marunouchi, Chiyoda-ku, Tokyo             Inside Ryo Electric Co., Ltd. F-term (reference) 5B042 GA12 GA19 GB06 MC19                 5B045 BB28 BB42 BB44 GG01                 5B089 GA11 GB02 GB08 HA06 JA35                       JB16 KA11                 5K048 AA05 CA01 DA02

Claims (33)

[Claims] 1. A user controls a supervisory control device from a remote location by activating an agent having a security function at a supervisory control terminal connected to a wide area network and utilizing the agent moving on the wide area network. In the remote monitoring and control system, a server connected to the wide area network, a local network connected to the wide area network via the server, and further connecting the monitoring control equipment, the remote network being moved to the wide area network. The lightweight agent generation unit included in the agent itself generates a lightweight agent having no security function in the server, and the generated lightweight agent moves through the local network to perform monitoring control processing of the monitoring control device. Characterized by performing Remote monitoring and control system. 2. After performing the monitoring control processing, the lightweight agent notifies the agent of the processing result from the server, and the agent notifies the user of the notified processing result from the monitoring control terminal. Item 2. The remote monitoring control system according to Item 1. 3. The remote monitoring and controlling system according to claim 1, wherein a plurality of monitoring and controlling devices are connected to the local network, and the lightweight agent circulates the plurality of monitoring and controlling devices. 4. The server comprises a supervisory control device list recording a plurality of supervisory control devices, and the lightweight agent refers to the supervisory control device list to determine whether or not all supervisory control devices have been visited. The remote monitoring and control system according to claim 3. 5. The apparatus according to claim 1, further comprising a plurality of local networks, wherein the agent goes around a server connected to the plurality of local networks.
The remote monitoring and control system according to any one of 1. 6. The agent comprises a server list recording servers connected to a plurality of local networks, and refers to the server list to determine whether or not all the servers have been visited. The described remote monitoring control system. 7. The remote monitoring control system according to claim 1, wherein the agent has a transmission guarantee function. 8. The remote monitoring control system according to claim 1, wherein the agent sequentially processes the processing result notified from the lightweight agent on the server. 9. The remote supervisory control system according to claim 8, wherein the agent notifies the user of only the result obtained by processing the data through the supervisory control terminal. 10. The lightweight agent comprises a status flag indicating an execution status of the supervisory control process, and the agent comprises a lightweight agent monitoring unit for detecting an execution status of the status flag through a local network. Remote monitoring and control system. 11. The lightweight agent monitoring unit notifies the lightweight agent generation unit of the detected inability to execute the status flag, and the agent regenerates a new lightweight agent. The described remote monitoring control system. 12. A recording medium used in a remote monitoring and controlling system for monitoring and controlling a monitoring and controlling device from a remote place, wherein an agent having a security function and started from a monitoring and controlling terminal and moving in a wide area network is connected to the wide area network. Moving to a connected server, the agent generating a lightweight agent in the server that does not have the security function and moves through a local network connected to the wide area network via the server; and The generated lightweight agent performs a step of moving the local network and executing a monitoring control process of the monitoring control device connected to the local network. control Recording medium used in the system. 13. The remote monitoring control according to claim 12, wherein after the monitoring control processing is executed, the lightweight agent performs a step of notifying a processing result from the server to the agent, which is readable by a computer in which a program is recorded. Recording medium used in the system. 14. The remote supervisory control system according to claim 12, wherein the lightweight agent performs a step of patrol a plurality of supervisory control devices in execution of supervisory control processing. Recording medium used for. 15. A program is recorded, wherein the lightweight agent refers to a supervisory control device list of a server in which a plurality of supervisory control devices are recorded, and determines whether or not all supervisory control devices have been visited. A computer-readable recording medium used in the remote monitoring and controlling system according to claim 14. 16. The computer-readable program recorded program according to claim 12, wherein the agent performs a step of patrol a server connected to a plurality of local networks in the step of generating the lightweight agent. A recording medium used in the remote monitoring and control system according to any one of 1. 17. The computer-readable program recorded with the program, wherein the agent determines whether or not all the servers have been visited by referring to the server list recording the servers connected to the plurality of local networks. A recording medium used in the remote monitoring and controlling system according to claim 16. 18. The recording medium for use in a remote monitoring and controlling system according to claim 12, wherein the agent has a transmission guarantee function and is readable by a computer. 19. The remote-monitoring control according to claim 12, wherein the agent sequentially performs a data processing step on the server of the processing result notified from the lightweight agent, which is computer-readable and has a program recorded thereon. Recording medium used in the system. 20. The computer-readable remote monitoring control system according to claim 19, wherein the agent carries out the step of bringing back only the result obtained by the data processing to the monitoring control terminal. Recording medium used for. 21. A computer-readable computer program having a program recorded thereon, characterized in that the lightweight agent represents the execution state of the supervisory control processing with a state flag, and the agent performs a step of detecting the execution state of the state flag through a local network. A recording medium that can be used in the remote monitoring and control system according to claim 12. 22. The computer-readable program recorded with the program, wherein the agent performs a step of regenerating a new lightweight agent in response to the detected inability to execute the status flag. Media used in the remote monitoring and control system of 23. In a program used for a remote monitoring control system for monitoring and controlling a monitoring control device from a remote location, an agent which is activated from a monitoring control terminal, has a security function, and moves on a wide area network connects to the wide area network. The agent, the agent generates a lightweight agent that moves in a local network connected to the wide area network via the server, the agent having no security function in the server, and generating the lightweight agent. The stored lightweight agent causes a computer to execute the step of moving the local network and executing the supervisory control processing of the supervisory control device connected to the local network. 24. The program according to claim 23, wherein after executing the monitoring control processing, the lightweight agent causes the computer to execute the step of notifying the agent of the processing result from the server. 25. The lightweight agent causes a computer to execute a step of patrol a plurality of supervisory control devices in the execution of the supervisory control processing.
The program described in 3. 26. The lightweight agent causes a computer to execute a step of determining whether or not all supervisory control devices have been visited by referring to a supervisory control device list of a server in which a plurality of supervisory control devices are recorded. 26. The program according to claim 25. 27. The method according to claim 23, wherein the agent, in the step of generating the lightweight agent, causes the computer to execute a step of patrol a server connected to a plurality of local networks.
The program described in any of. 28. The agent causes a computer to execute a step of determining whether or not all the servers have been visited by referring to a server list in which servers connected to a plurality of local networks are recorded. The listed program. 29. The program according to claim 23, wherein the agent causes a computer to execute a step of performing a transmission guarantee function. 30. The program according to claim 23, wherein the agent causes the computer to sequentially execute the data processing on the server of the processing result notified from the lightweight agent. 31. The program according to claim 30, wherein the agent causes the computer to execute a step of bringing back only the result obtained by the data processing to the monitor control terminal. 32. The lightweight agent represents the execution state of the supervisory control processing with a state flag, and the agent causes a computer to execute a step of detecting the execution state of the state flag through a local network. Program of. 33. The program according to claim 32, wherein the agent causes the computer to execute a step of regenerating a new lightweight agent in response to the detected inability to execute the status flag.