KR20030043382A - Embedded web server system for monitoring/control of industrial controller - Google Patents

Abstract

The present invention provides an embedded web server system for monitoring / controlling an industrial controller for implementing a monitoring system of an industrial controller at a low cost without limiting the installation environment by building an embedded web server of an embedded type.

To this end, the present invention is a monitoring / control system of an industrial controller for monitoring and controlling the operating state of the industrial controller, embedded in the industrial controller embedded in the industrial type remotely via the network communication status data from the industrial controller And a remote monitoring network terminal configured to remotely monitor and control an industrial controller of receiving the status data from the embedded web server through a network communication network and a built-in web server transmitting to the network.

Description

Embedded web server system for monitoring / control of industrial controllers {Embedded web server system for monitoring / control of industrial controller}

The present invention relates to an embedded web server system for monitoring / control of an industrial controller, and more particularly, to an industrial controller for remotely performing monitoring and status control for maintenance or inspection of various industrial controllers through an internet communication network. An embedded web server system for monitoring / control of

In general, a controller having a microprocessor for control, such as various industrial equipment, air conditioning controllers, or various home appliances, needs continuous monitoring and control. It is supposed to be done.

That is, Figure 1 is a view showing the configuration of a general web server system for monitoring the industrial controller according to the prior art, the controller 2 shown in the figure is a general communication means such as RS-232 or RS-485 data It is connected to the web server 6 through a communication module 4 for transmitting and receiving. The web server 6 is composed of a PC / UNIX web server and is connected to the Internet communication network and is capable of transmitting and receiving data with the network terminal 8 as a PC / UNIX remote monitoring system located remotely.

The web server 6 receives the monitoring data from the controller 2 through the communication module 4 through a data port such as an RS-233 port, and transmits the data to the network terminal 8 through an internet communication network. The network terminal 8 can receive various status data from the controller 2 in the form of web information by executing a web browser program having the HTTP protocol and accessing the web server 6.

However, in the conventional web server system for monitoring the industrial controller, not only the price of the web server is expensive but also the administrator of the server needs to be full-time, thus increasing the cost burden and installing a PC / UNIX-class server. There is a problem that it is difficult to establish as a general-purpose communication system because the location to be installed is limited and it affects the surrounding conditions such as the environment where constant temperature / humidity is achieved.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, the purpose of which is to build a built-in web server of the embedded type to implement the industrial monitoring system of the industrial controller at low cost without limiting the installation environment It provides an embedded web server system for monitoring / controlling a controller.

1 is a view showing the configuration of a general web server system for monitoring the industrial controller according to the prior art,

2 is a view showing the configuration of the embedded web server system for monitoring / control of the industrial controller according to the present invention,

3 is a view showing a detailed configuration of the embedded web server shown in FIG.

4A to 4E are flowcharts showing information processing flows between an embedded web server and a client-side network terminal according to a preferred embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: controller, 12: communication module,

14: embedded web server, 16: network terminal for monitoring,

18: Network terminal for receiving mail, 20: Universal communication module,

22: memory module, 28: microprocessor,

30: Ethernet communication module.

In order to achieve the above object, according to the present invention, in the monitoring / control system of the industrial controller for performing the monitoring and control of the operating state of the industrial controller, embedded in the industrial controller as a built-in type from the industrial controller An embedded web server for transmitting data to a remote place through a network communication network, and a remote monitoring network terminal for receiving the status data from the embedded web server through a network communication network to remotely monitor and control the industrial controller of the industrial An embedded web server system for monitoring / controlling a controller is provided.

Hereinafter, the present invention configured as described above will be described in detail with reference to the accompanying drawings.

That is, Figure 2 is a view showing the configuration of the embedded web server system for monitoring / control of the industrial controller according to the present invention.

As shown in FIG. 2, the embedded web server system for monitoring / controlling an industrial controller according to the present invention includes a controller 10, a communication module 12, an embedded web server 14, and a monitoring network terminal 16. ), And a network terminal 18 for receiving mail.

In the figure, the controller 10 is equipped with a microprocessor, such as equipment of various industrial roads to be monitored and controlled, air conditioning controllers, traffic signal generators such as crosswalks and intersections, various home appliances, and the like. A device, which transmits various state data of the device to the embedded web server 14 through the communication module 12 and is subject to monitoring and control according to an upgrade command of the embedded web server 14. Upgrade the software program to activate the function.

The embedded web server 14 receives various status data from the controller 10 through the communication module 12 and provides the monitoring network terminal 16 in the form of an HTML file through an internet communication network. The abnormality notification information according to the abnormality occurrence of the controller 10 is transmitted to the mail receiving network terminal 18 in the form of electronic mail data.

In addition, the embedded web server 14 is provided with a unique Internet Protocol address, and has web information of an HTML file to service monitoring and control functions for the controller 10.

In the figure, the monitoring network terminal 16 is provided with a modem or LAN card that can be connected to the embedded web server 14 through an internet communication network, and has a web with an HTTP client function and a Java program execution function. The browser program is embedded to receive the state data for monitoring the controller 10 by exchanging information with the embedded web server 14 through an internet communication network.

The mail receiving network terminal 18 is provided with a modem or LAN card which can be connected to the embedded web server 14 through an internet communication network, and has a mail receiving program having an execution function of SMTP. Through the embedded web server 14 receives the e-mail data for notifying the abnormal state of the controller 10.

Here, in the embodiment of the present invention, the network terminal 16 for transmitting and receiving the HTML file and the network terminal 18 for transmitting and receiving the e-mail are separately configured. It can also be configured to be implemented in a single network terminal.

3 shows a detailed configuration of the embedded web server shown in FIG. 2, wherein the embedded web server 14 includes a general-purpose communication module 20, a memory module 22, and a microprocessor 28. And an Ethernet communication module 30.

In the figure, the general-purpose communication module 20 communicates with the controller 10 through the communication module 12 in an RS232 / 485 manner to perform data transmission and reception.

The memory module 22 is a driving software program for driving the embedded web server 14. The ROM 24 stores a real-time operating system (RTOS) or an embedded Linux program. ROM) and a RAM 26 (RAM) for storing state data received from the controller 10 or temporarily storing operation data according to Internet communication.

The ROM 24 includes a web server program driven by a Hyper Text Transfer Protocol (HTTP) based on a communication protocol of TCP / IP, and a Simple Mail Transfer Protocol (SMTP). Program for mail server running, program for virtual terminal driven by Telnet, and file transfer server program driven by File Transfer Protocol (FTP) are stored to enable Internet service and real-time operation The control program using the system (RTOS) or embedded Linux is stored.

In addition, the microprocessor 28 runs a software program for internet communication stored in the ROM 24 to monitor network data received from the controller 10 through the universal communication module 20 through an internet communication network. In addition to transmitting to (16), control processing for transmitting the e-mail data notifying the abnormal occurrence state of the controller 10 to the mail receiving network terminal 18 is performed.

The Ethernet communication module 30 is connected to the Internet communication network through an Ethernet local area network consisting of a transmission medium of 10BASE-T, and transmits data according to the control process of the microprocessor 28. .

Next, the operation of the present invention made as described above will be described in detail with reference to the flowcharts of FIGS. 4A to 4E.

First, referring to the flowchart of FIG. 4A, the authentication procedure when connecting to the embedded web server 14 through the Internet communication network from the monitoring network terminal 16 will be described in detail.

That is, the microprocessor 28 of the embedded web server 14 is to determine whether the connection via the Internet communication network is made in the monitoring network terminal 16 consisting of HTTP clients (step S10), the monitoring network If it is determined that the communication connection of the terminal 16 is established, a procedure of confirming the user number (ID) and the password (PW) is performed according to the input operation of the client (step S11).

In this state, the microprocessor 28 of the embedded web server 14 determines whether the user authentication has been performed based on the result of checking the user number and password, and if it is determined that the user authentication has not been performed (step S12). NO) to transmit the web information for notifying the user authentication failure to the monitoring network terminal 16 (step S13).

However, if it is determined that the authentication of the user is successful according to the determination result of step S12, main HTML page information is transmitted as web information for monitoring and control of the controller 10 (step S14), and through the Internet communication network. The web service of monitoring and control is performed (step S15).

Next, with reference to the flowchart of FIG. 4B, the operation | movement of notification of abnormality at the time of abnormality occurrence of the controller 10 is demonstrated in detail.

First, the microprocessor 28 of the embedded web server 14 communicates with the controller 10 through the universal communication module 20 to determine whether the communication result is normal (step S20).

If it is determined that the communication result with the controller 10 is not normal, the microprocessor 28 of the embedded web server 14 determines that an abnormality has occurred in the communication state with the controller 10 ( Step S21), by operating the mail server program stored in the ROM 24 of the memory module 22, an e-mail message for notifying of an abnormal condition is generated and transmitted to the mail receiving network terminal 18 through the Internet communication network. (Step S22).

Accordingly, the mail receiving network terminal 18 receives the abnormality notification mail data from the embedded web server 14 received through the Internet communication network, and an error occurs in the communication state for monitoring the controller 10. Can be detected.

On the other hand, if it is determined that the communication state with the controller 10 is normal in the microprocessor 28 of the embedded web server 14 according to the determination result of step S20, receive the state data from the controller 10. (Step S23), the status data is transmitted to the monitoring network terminal 16 as monitoring panel data (step S24).

In this state, the embedded web server 14 analyzes the state data received from the controller 10, and provides the information according to the analysis result as an HTTP service (step S25).

Meanwhile, the microprocessor 28 of the embedded web server 14 determines whether an abnormality has occurred in the controller 10 as a result of analyzing the state data (step S26).

As a result of the determination, when the microprocessor 28 of the embedded web server 14 determines that an abnormality has occurred in the controller 10, the process proceeds to the step S22 to create an e-mail message that notifies the abnormality occurrence state. In addition to transmitting to the network terminal 18 for receiving mail through the Internet communication network, the monitoring network terminal 16 is also notified of an abnormality in the form of an HTML file through HTTP.

Next, an operation for changing the operation structure of the controller will be described in detail with reference to the flowchart of FIG. 4C.

First, the embedded web server 14 is connected to the monitoring network terminal 16 through the Internet communication network, the control operation of the controller 10 in the monitoring network terminal 16, temperature setting, time adjustment It is determined whether or not to perform a request for changing the operation structure such as this (step S30).

As a result of the determination, if it is determined that the monitoring network terminal 16 is performing a request for changing the operation structure of the controller 10, the user number and password assigned to the monitoring network terminal 16 are entered. When the user is authenticated by the user number and the password, the user receives the web information data on the structural change made from the monitoring network terminal 16 (step S32). ).

In this state, the microprocessor 28 of the embedded web server 14 transmits the structure change information received from the monitoring network terminal 16 through the Internet communication network through the communication module 12 to the controller 10. (Step S33).

On the other hand, the microprocessor 28 of the embedded web server 14 determines whether or not to authenticate the contents of the structural change by the information of the structural change received from the controller 10 (step S34).

As a result of the determination, when it is determined that the authentication information for the structural change is received by the controller 10, the microprocessor 28 of the embedded web server (! 4) receives the corresponding structural change. Completion information notifying completion of the data is transmitted to the monitoring network terminal 16 (step S35).

Next, the operation of the supervisor mode will be described in detail with reference to the flowchart of FIG. 4D.

First, in the microprocessor 28 of the embedded web server 14 is connected to the monitoring network terminal 16 and the Internet communication network, the monitoring network terminal 16 to set the supervisor mode on the Internet Web It is judged whether or not (step S40).

As a result of the determination, when it is determined that the supervisor mode is set in the monitoring network terminal 16, the microprocessor 28 of the embedded web server 14 performs the remote monitoring that is created from the monitoring network terminal 16. HTML content representing the item is received (step S41).

In addition, the microprocessor 28 of the embedded web server 14 is configured to send an e-mail address to a person to whom an e-mail is to be sent in accordance with an input operation of the monitoring network terminal 16 or the mail receiving network terminal 18. The addition / modification / deletion is performed (step S42), and an operation for adjusting the level of the user using the embedded web server 14 is performed (step S43).

Next, an operation for upgrading the software program used in the controller 10 and the embedded web server 14 will be described in detail with reference to the flowchart of FIG. 4E.

First, the embedded web server 14 determines whether a program upgrade command is received from the monitoring network terminal 16 (step S50).

As a result of the determination, if it is determined that the upgrade command of the program is received from the monitoring network terminal 16, the procedure for checking the user number and password assigned to the user of the corresponding monitoring network terminal 16 is performed ( Step S51).

In this state, the microprocessor 28 of the embedded web server 14 determines whether user authentication has been performed by determining whether user authentication has been performed (YES in step S52), and the monitoring network terminal 16 In step S53, it is determined whether or not the upgrade command from the command is an upgrade command for the program of the controller 10.

As a result of the determination, when the microprocessor 28 of the embedded web server 14 determines that the upgrade command of the monitoring network terminal 16 is an upgrade command for a program of the controller 10, the memory module ( The file transfer server (FTP) prepares for transfer by running the file transfer server program stored in the ROM 24 (22).

In this state, the microprocessor 28 of the embedded web server 14 judges whether or not the connection by the file transfer protocol (FTP) is established in the monitoring network terminal 16 (step S55). ).

As a result of the determination, if it is determined that the connection by the file transfer protocol (FTP) is established in the monitoring network terminal 16, the software program used in the controller 10 is transferred from the monitoring network terminal 16 to the file transfer protocol. (FTP), and the received software program is transmitted to the controller 10 via the communication module 12 (step S57).

Accordingly, the controller 10 can execute the upgrade by the software program received from the embedded web server 14 (step S58).

Meanwhile, according to the determination result of step S53, the microprocessor 28 of the embedded web server 14 determines that the upgrade command of the monitoring network terminal 16 is not a command for upgrading the controller 10. If so, it is determined whether the upgrade command is a command for upgrading the web server 14 (step S59).

As a result of the determination, when the microprocessor 28 of the embedded web server 14 determines that the upgrade command of the monitoring network terminal 16 is a command for upgrading the program of the web server 14, the memory The file transfer server program stored in the ROM 24 of the module 22 is executed to prepare for transfer by the file transfer protocol (FTP) (step S60).

In this state, the embedded web server 14 judges whether or not the monitoring network terminal 16 has established an Internet connection by means of a file transfer protocol (FTP) (step S61).

As a result of the determination, when it is determined that the connection by the file transfer protocol (FTP) has been made in the monitoring network terminal 16, the microprocessor 28 of the embedded web server 14 uses the Ethernet communication module 30. The software program transmitted from the monitoring network terminal 16 is received (step S62), and the upgrade of various server programs stored in the ROM 24 of the memory module 22 is performed by the received software program. (Step S63).

On the other hand, if it is determined that the connection by the file transfer protocol (FTP) has not been performed in the monitoring network terminal 16 according to the determination result of the steps S55 and S61, the timeout is determined by the determination of the step S64. It is determined whether the connection is made or not and whether the connection by the file transfer protocol (FTP) is made continuously.

It is a matter of course that the present invention having the above-described embodiments can be variously modified and implemented without departing from the technical spirit of the present invention without departing from the embodiments.

As described above, according to the present invention, it is possible to build a built-in web server applying the embedded embedded processor technology, it is possible not only to build a web server at low cost, but also to offset the cost burden without the need for a separate server administrator. In addition, there is an effect that can build an embedded web server regardless of the type and location of the controller without limiting the installation environment.

Claims (6)

In the monitoring / control system of the industrial controller that performs the monitoring and control of the operating state of the industrial controller, An embedded web server embedded in the industrial controller and transmitting status data from the industrial controller to a remote place through a network communication network; An embedded web server system for monitoring / controlling an industrial controller, comprising: a remote monitoring network terminal configured to receive status data from the embedded web server through a network communication network to remotely monitor and control an industrial controller. The method of claim 1, wherein the embedded web server is a communication module for performing data communication for receiving status data from the industrial controller, a control program using the embedded Linux operating system and the exchange of HTTP data based on the Internet protocol A microprocessor for controlling a memory module having a software program stored therein, a control for transmitting the state data from an industrial controller to a remote monitoring network terminal in the form of HTTP data by driving the software program of the memory module, and Ethernet. An embedded web server system for monitoring / controlling an industrial controller, comprising: an Ethernet communication module connected to a network communication network through the network and transmitting HTTP data on an operating state of the industrial controller to a remote monitoring network terminal. The microprocessor of claim 2, wherein the microprocessor of the embedded web server is configured to transmit notification of the abnormality to the remote monitoring network terminal as e-mail data when an abnormality is detected in the communication abnormality and operation state of the industrial controller. Embedded web server system for the monitoring / control of the industrial controller. The monitoring / monitoring of the industrial controller according to claim 2, wherein the embedded web server receives the web information of the structural change related to the operation of the industrial controller from the remote monitoring network terminal and changes the operating structure of the industrial controller. Embedded web server system for control. The industrial controller of claim 2, wherein the embedded web server is connected to a remote monitoring network terminal through a file transfer protocol (FTP) to execute upgrade of a software program running on the embedded web server and the industrial controller. Embedded web server system for monitoring / control of data. The industrial controller of claim 2, wherein the embedded web server is configured to add, modify, and delete HTML contents and mailing lists by request of the remote monitoring network terminal, and to adjust user ratings. Embedded web server system for monitoring / control of data.