Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS20020091784 A1
Publication typeApplication
Application numberUS 09/738,433
Publication dateJul 11, 2002
Filing dateDec 15, 2000
Priority dateSep 10, 1997
Also published asUS7664869, US20080104189
Publication number09738433, 738433, US 2002/0091784 A1, US 2002/091784 A1, US 20020091784 A1, US 20020091784A1, US 2002091784 A1, US 2002091784A1, US-A1-20020091784, US-A1-2002091784, US2002/0091784A1, US2002/091784A1, US20020091784 A1, US20020091784A1, US2002091784 A1, US2002091784A1
InventorsRichard Baker, Jean-Marc Rolland
Original AssigneeBaker Richard A., Jean-Marc Rolland
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Web interface to a device and an electrical network control system
US 20020091784 A1
Abstract
A method and interface module for communicating messages with a remote location and to provide access to an at least one intelligent electronic device (IED) operably connected to a communication network. The interface module is comprised of a central processing unit and an operating system operating the central processing unit. A network interface is operably connected with the communication network. A protocol task processes communication on the network according to a protocol stack. A set of application tasks communicates with the protocol task for responding to an incoming message from the communication network and initiating an outgoing message to the communication network. An interconnection bus with an interface driver is operably connected with the at least one IED.
Images(6)
Previous page
Next page
Claims(48)
We claim:
1. An interface module for communicating messages with a remote location and to provide access to an at least one intelligent electronic device (IED) operably connected to a communication network, the interface module comprising:
a central processing unit;
an operating system operating the central processing unit;
a network interface for communicating with the communication network;
a protocol stack for managing the communication on the network;
a protocol task for processing the communication according to the protocol stack;
a set of application tasks communicating with the protocol task for responding to an incoming message from the communication network and initiating an outgoing message to the communication network; and,
an interconnection bus with an interface driver for communicating with the at least one IED.
2. The interface module of claim 1 wherein the communication network is a worldwide Internet network using the Internet Protocol (IP).
3. The interface module of claim 2 operating as a Web site on the Internet, the interface module having a global IP address.
4. The interface module of claim 1 wherein the network interface is operably connected to a driver.
5. The interface module of claim 4 wherein the network interface is operably connected to an Ethernet driver.
6. The interface module of claim 4 wherein the network interface is operably connected to a SLIP/PPP driver.
7. The interface module of claim 1 wherein the protocol stack is a Transmission Control Protocol stack.
8. The interface module of claim 1 wherein the set of application tasks includes a control task for processing the messages between a remote location and the at least one IED using an industrial communication standard Modbus over TCP/IP.
9. The interface module of claim 8 wherein the control task accepts a connection; parses a Modbus message; and, calls the operating system to process the Modbus message.
10. The interface module of claim 9 wherein the control task comprises means for processing the Modbus message received from the remote location over the communication network; accessing data on the at least one IED; and, sending back a response.
11. The interface of claim 10 wherein the control task further includes means for initiating the message allowing the at least one IED to communicate with the remote module.
12. The interface of claim 1 wherein the set of application tasks comprises a HTTP server task for processing the Hypertext Transport Protocol (HTTP) to provide a standard Web access to a remote Web browser.
13. The interface module of claim 12 wherein the HTTP server task accepts a connection; parses an HTTP message; and, calls the operating system to process the HTTP message.
14. The interface module of claim 13 wherein the HTTP message allows a user at a remote location to view data within the at least one IED from the browser operably connected to the communication network.
15. The interface module of claim 13 wherein the HTTP message allows a user at a remote location to write data within the at least one IED from the browser operably connected to the communication network.
16. The interface module of claim 2 wherein the set of application tasks comprises a FTP server task for processing a File Transfer Protocol (FTP).
17. The interface module of claim 16 wherein the FTP server task accepts a connection; parses an FTP message; and, calls the operating system to process the FTP message.
18. The interface module of claim 17 wherein the FTP message allows a user at a remote location to download a file for updating the operating software within the at least one IED through the Internet.
19. The interface module of claim 17 wherein the FTP message allows a user at a remote location to upload a file for obtaining data records from the at least one IED through the Internet.
20. The interface module of claim 1 wherein the data transfer enabling means comprises a dual TCP/IP stack.
21. The interface module of claim 20 wherein the dual TCP/IP stack comprises a first stack capable of handling a broad range of TCP/IP messages and a second stack capable of handling a less broad range of TCP/IP messages more quickly than the first stack is capable of handling the broad range of TCP/IP messages.
22. A control system for allowing a user access at a remote site through a communication network, to information and data contained in an electrical network control system having an at least one intelligent electronic device (IED), the control system comprising:
means for coupling the remote site to the communication network, the coupling means including a Web browser for interacting with the communication network;
a Web site associated with the electrical network control system and accessible through the communication network;
means for linking the electrical network control system to the Web site, the linking means including an interface module for coupling the at least one IED to the communication network;
means for coupling the interface module to the at least one IED and transferring messages between the interface module and the at least one IED;
means for enabling the message transfer between the remote location and the electrical network control system; and,
means for processing a message received from the remote location over the communication network, the means for processing the message comprising means for receiving a message; means for accessing the at least one IED for the message; and, means for sending a response to the remote location through the communication network.
23. The control system of claim 22 wherein the communication network is a worldwide Internet network using an Internet Protocol (IP).
24. The control system of claim 22 wherein the interface module operates as a Web site on the Internet, the interface module having a global IP address.
25. The control system of claim 24 wherein the interface module comprises a network driver for receiving the message from the Web browser on the Internet and for sending a response back to the Web browser.
26. The control system of claim 25 wherein the message transfer enabling means comprises a protocol task using a Transmission Control Protocol (TCP).
27. The control system of claim 26 wherein the protocol task implements a dual TCP stack.
28. The control system of claim 27 wherein the dual TCP stack comprises one stack capable of handling TCP/IP messages with a higher priority than the other stack.
29. The control system of claim 28 wherein the message processing means comprises a control task for processing a message exchange over the communication network between a remote application and the at least one IED using the industrial communication standard Modbus over TCP/IP.
30. The control system of claim 29 wherein the control task accepts a connection; parses a Modbus message; and, calls the operating system to process the Modbus message.
31. The control system of claim 30 wherein the control task includes means for processing the message received from the remote location over the communication network; accessing data on the at least one IED; and, sending back a response.
32. The control system of claim 31 wherein the control task further includes means for initiating the message allowing the IED to communicate with the remote location over the communication network.
33. The control system of claim 28 wherein the data message processing means includes a FTP server task for processing a File Transfer Protocol (FTP).
34. The control system of claim 33 wherein the FTP server task accepts a connection; parses an FTP message; and, calls the operating system to process the FTP message.
35. The control system of claim 34 wherein the FTP message allows a user at the remote location to download a file through the Internet for updating the operating software within the at least one IED associated with the electrical network control system.
36. The control system of claim 35 wherein the FTP message allows a user at the remote location to upload through the Internet a file for obtaining data records from the at least one IED associated with the electrical network control system.
37. The control system of claim 28 wherein the data message processing means includes a HTTP server task for processing a Hypertext Transport Protocol (HTTP) to provide access to the remote Web browser.
38. The control system of claim 37 wherein the HTTP task accepts a connection; parses an HTTP message; and, calls the operating system to process the HTTP message.
39. The control system of claim 38 wherein the HTTP message allows a user at the remote location to view the electrical network control system from a browser connected to the Internet.
40. The control system of claim 39 wherein the HTTP message allows a user at the remote location to write to the electrical network control system from a browser connected to the Internet.
41. The control system of claim 38 wherein the HTTP message allows a user at the remote location to view IED data from a browser connected to the Internet.
42. The control system of claim 39 wherein the HTTP message allows a user at the remote location to write IED data from a browser connected to the Internet.
43. The control system of claim 38 wherein a Java message allows a user at the remote location to view IED data from a browser connected to the Internet.
44. The control system of claim 39 wherein a Java message allows a user at the remote location to write IED data from a browser connected to the Internet.
45. The control system of claim 38 wherein an ActiveX message allows a user at the remote location to view IED data from a browser connected to the Internet.
46. The control system of claim 39 wherein an ActiveX message allows a user at the remote location to write IED data from a browser connected to the Internet.
47. A method of communicating with an intelligent electronic device operably connected to a communication network, the method comprising the steps of:
utilizing a web browser to contact the intelligent electronic device; and,
obtaining information from the intelligent electronic device.
48. The method of claim 47 further comprising the step of sending information to the intelligent electronic device from the web browser.
Description
    RELATED APPLICATIONS
  • [0001]
    This application is a continuation-in-part of U.S. patent application Ser. No. 09/595,159 filed on Jun. 15, 2000, entitled “Web Interface To An Input/Output Device (SAA-35), which is a continuation-in-part of U.S. patent application Ser. No. 08/927,005, filed on Sep. 10, 1997, entitled “Web Interface To A Programmable Controller.” This application is also related to the following, commonly assigned applications entitled, “Messaging Application Layer (MODBUS) Over Ethernet To Transport Layer (TCP) Communications Method and Apparatus For A Modular Terminal Input/Output System,” U.S. patent application Ser. No. 09/166,870, filed Oct. 6, 1998; “Web Interface To A Programmable Controller,” U.S. patent application Ser. No. 09/303,458, filed Apr. 30, 1999; “Interface To A Programmable Logic Controller,” U.S. patent application Ser. No. 09/223,349, filed Dec. 30, 1998; and “Communications System For A Control System Over Ethernet And IP Networks And Communication Interfaces For Such Systems,” U.S. Patent Application Ser. No. 60/078,223, filed Mar. 16, 1998. The contents of these Applications are expressly incorporated herein by reference.
  • TECHNICAL FIELD
  • [0002]
    The present invention relates generally to the field of protection, monitoring and controlling devices and modules for an electrical network control system. More particularly, the present invention relates to a system for coupling protection, monitoring and controlling devices and modules to a Web server.
  • BACKGROUND OF THE INVENTION
  • [0003]
    Remote monitoring and control of Substation Automation Systems (SAS), and protection, monitoring and controlling devices has taken many forms. In the past, dedicated lines were the common form of communication between a control system and a remote location. This type of communication had limited application since the control system was not accessible from multiple locations. Modems have made it possible to access the control system from different locations, but this type of access required implementing generally specific communication protocols. Providing any type of control function between locations is rather limited in this type of environment. Furthermore, a customized interface is generally required to access the control system by an end user.
  • [0004]
    With the growth of Internet and its World Wide Web providing a delivery platform for organizing Internet data through hypertext links, a client server system can be designed that will give each end user the same type of user friendly interface and universal access to services on the Web. The Web is a network of documents called sites or pages stored on server computers throughout the world. Each page typically contains text, multimedia offerings, i.e., graphic images, video, or audio; and hypertext links to other Web pages or documents. A browser allows a user to read and interact with the Web page. The browser is a graphical software program that sends commands to the Internet Web site and displays whatever information is available on the page. As is well known, various browser programs are commercially available from different manufacturers.
  • [0005]
    The Internet network employs methods designed to handle many general-purpose computers sharing a single cable, and therefore has no ability to differentiate traffic in terms of its purpose or the criticality of its data. The Internet is no longer a network of computers sharing a single cable, but rather a web of interconnected point to point links involving both general purpose stations and specialized infrastructure components such as routers and firewalls.
  • [0006]
    Most personal computers or work stations can be used by the end user to connect to the Web through the commercially available browsers. Communication over the Internet and other networks requires one of several available protocols. Protocols such as Internet Protocol (IP) provide for file transfers, electronic mail, and other services. Commercially available programming languages such as Java or ActiveX, along with Hypertext Markup Language (HTML) and Extensive Markup Language (XML), are used in designing layouts and graphics for a Web site or page and have extended Internet technology such that a Web site can be used for dynamic applications, e.g., applets or plug-ins, that can be downloaded and run by the end user.
  • [0007]
    Many manufacturers provide automation information using dedicated hardware and software with private communication networking environments. Numerical protection units, electronic meters, fault detectors, substation control units and Remote Terminal Units (RTU) are widely used in control network systems. In addition to these devices, monitoring and controlling modules for smart power equipment (e.g. intelligent circuit breaker, switch gear and power transformer) may also be integrated in process control systems. Such specialized environments can be very expensive. Furthermore, these systems are based on proprietary communication busses and conversion products are required to allow information carried over those networks to be visible on a general-purpose network. There are significant installation and other deployment costs associated with the existence of such intermediate devices.
  • [0008]
    It would be desirable to develop an electrical network control system whereby a user could use general purpose communication networks, such as the Internet and specialized industrial networks, directly connected to intelligent power equipment, protection units, electronic meters, fault detectors, substation control units and RTUs for remote monitoring and control access.
  • [0009]
    This invention is designed to solve these and other problems.
  • SUMMARY OF THE INVENTION
  • [0010]
    Accordingly, an object of the present invention is to provide an interface between an electrical network control system and a Web browser coupled to a communication network such as the Internet.
  • [0011]
    Another object of the invention is directed to an interface module for communicating messages with a remote location and to provide access to an at least one intelligent electronic device (IED) operably connected to a communication network. The interface module is comprised of a central processing unit and an operating system operating the central processing unit. A network interface is operably connected with the communication network. A protocol task processes communication on the network according to a protocol stack. A set of application tasks communicates with the protocol task for responding to an incoming message from the communication network and initiating an outgoing message to the communication network. An interconnection bus with an interface driver is operably connected with the at least one IED.
  • [0012]
    A further object of the present invention is to provide remote access through a Web browser to an Intelligent Electronic Device (IED), i.e., intelligent power equipment, protection units, electronic meters, fault detectors, substation control units, RTUs and smart power equipment such as intelligent circuit breakers, switch gears and power transformers.
  • [0013]
    The present invention allows for easy access over a commercial network such as the Internet to information within at least one IED. Access can be made locally or worldwide using a commercial Web browser. The invention is comprised of a control system of essential elements comprising a Web interface, a local network, and a network interface to at least one IED.
  • [0014]
    The Web interface runs Web pages from an embedded interface module coupled to the main IED processor board. The Web interface module includes a network driver, a Transmission Control Protocol/Internet Protocol (TCP/IP) stack, a hypertext transfer protocol (HTTP) interpreter, a file transfer protocol (FTP) server, and an interface driver to the IED.
  • [0015]
    The Web interface provides access to the IED by a user at a remote location through the Internet. The interface translates the TCP/IP, FTP and HTTP protocols used on the Internet into data recognizable to the IED. Using this interface, the user can retrieve all pertinent data regarding the operation of the IED and the related process, i.e., configuration data; operating statistics; diagnoses; and data from the process or the primary equipment, such as input/output status, measurements, alarms, event records, disturbance/fault records, power quality data and predictive maintenance information.
  • [0016]
    The user can also modify parameters and send controls to the IED. Updates to operating software can also be downloaded through the Internet access and the FTP protocol. In the preferred embodiment of the invention to a SAS, the IED is connected to an Ethernet local network and the network driver is an Ethernet driver.
  • [0017]
    Another object of the invention also allows for access to smaller control systems such as pole-top control systems. For such simple systems, the IED can be connected to regular telephone wires using a phone modem wherein the network driver is a PPP (Point-To-Point Protocol) or SLIP (Serial Line Internet Protocol) driver.
  • [0018]
    Yet a further object of the invention is a method of communicating with an intelligent electronic device operably connected to a communication network. The method comprises the steps of utilizing a web browser to contact the intelligent electronic device. Information is obtained from the intelligent electronic device using a protocol and programming language. Information can also be sent to the intelligent electronic device from the web browser. For instance, various protocols, i.e., HTML, SGML, XML, etc. cooperate with known or yet to be developed programming languages and technologies such as Java, ActiveX, etc., to communicate with the IED. The IED can also be controlled in this manner from the web browser.
  • [0019]
    Other features and advantages of the invention, which are believed to be novel and nonobvious, will be apparent from the following specification taken in conjunction with the accompanying drawings in which there is shown a preferred embodiment of the invention. Reference is made to the claims for interpreting the full scope of the invention which is not necessarily represented by such embodiment.
  • BRIEF DESCRIPTION OF THE DRAWINGS
  • [0020]
    [0020]FIG. 1 is an overview block diagram illustrating the relationship between a user at a remote location and an Internet Web site embedded in a control system and used for monitoring and operating on an electrical network control system, according to the present invention;
  • [0021]
    [0021]FIG. 2 is a block diagram illustrating the main features of an embedded Web site associated with an intelligent electronic device (IED), according to the present invention;
  • [0022]
    [0022]FIG. 3 is a block diagram of the present invention illustrating an Internet interface to an IED;
  • [0023]
    [0023]FIG. 4 is a block diagram of the Web server module illustrated in FIG. 2 according to the present invention; and,
  • [0024]
    [0024]FIG. 5 is a block diagram of the present invention illustrating an IED operably connected to an SAS.
  • DETAILED DESCRIPTION
  • [0025]
    Although this invention is susceptible to embodiments of many different forms, a preferred embodiment will be described and illustrated in detail herein. The present disclosure exemplifies the principles of the invention and is not to be considered a limit to the broader aspects of the invention to the particular embodiment as described.
  • [0026]
    [0026]FIG. 1 shows an overview block diagram illustrating the relationship between a user 1 at a remote location and an Internet Web site 3 embedded in a control system 7 used for monitoring and operating a process.
  • [0027]
    The user 1 will have a personal computer (PC) 5 having a commercially available browser 6, such as Netscape Communication's Navigator or Microsoft's Internet Explorer, installed for viewing the contents at the Web site through a communication network, such as the Internet 4. The PC 5 provides a remote human-machine interface (HMI) to the electrical network control system 7. Various interconnection services are readily available to provide the physical and electrical interconnection from the PC 5 to the Internet 4 itself. The Internet 4 is a collection of independent worldwide communication networks that are interconnected to each other and function as a single connectionless entity. Communication is based on a client-server basis, using a number of established protocols that allow for communication and file transfers between the client and the server. One of the most widely used protocols is Internet Protocol (IP). The applications layer protocol interface to the Web browser is typically through the HTTP protocol using the HTML, XML, JAVA or ActiveX language. File transfers are typically implemented through the FTP protocol.
  • [0028]
    The user 1 can connect to the Internet 4 using one of a number of Internet service providers and will enter the address of the Web site 3 when connected. The Web site 3 will display a home page which may contain text, some type of multimedia offerings such as graphic images, video, or audio, and possible hypertext links to other Web sites or documents. Trouble shooting instructions, maintenance logs, repair diagnostic information, quality control parameters, etc., reside within the Web site 3 for convenient access by the user. The browser 6 allows the user 1 to read and interact with the page. The browser 6 will send commands to the Web site 3 which will interact with an intelligent electronic device (IED) 20 and display the information available from the electrical network control system 7, concerning the process and the control system itself. The browser 6 facilitates human interaction with the electrical network control system 7.
  • [0029]
    [0029]FIG. 2 is a block diagram illustrating the main features of an embedded Web site 3 associated with an IED 20. The Web site 3 includes a network interface 8 having a unique Internet address 9, a server 10, and an IED interface 12. The server 10 includes a hypertext transfer protocol (HTTP) interpreter and a FTP server and uses a Transmission Control Protocol (TCP) in conjunction with Internet Protocol through a Transmission Control Protocol/Internet Protocol (TCP/IP) stack 11 to interact with the network interface 8. This enables the transfer of data and files between the IED 20 and the user 1 through the Internet 4. The IED interface 12 exchanges information with the IED 20 and enables the server 10 to transfer/obtain data to/from the electrical network control system 7. The exchanged data can be used by the user at a remote location to monitor and control the process. The transferred files can be used (in a downloading direction) to update the operating software on the IEDs 20 which the control system is based on and to get measurements, events and disturbance/fault records (in an uploading direction). The TCP/IP stack 11 enables data transfers over the Internet 4 between the user 1 and the Web site 3 as required for the various layers specified by the IP protocol.
  • [0030]
    [0030]FIG. 3 is a block diagram of the present invention illustrating the Internet interface to an IED 20. The Web site 3 illustrated in FIGS. 1 and 2 is physically implemented on the Web interface module 21. The Web interface module 21 includes the network interface 8 having a unique Internet address 9 and a Web server 22. The Web server 22 provides the home page for the Web site 3. Security for the overall system can be included in the Web server 22, but is generally maintained as part of the network interface 8. A password and user list can be provided in initial configuration files stored in the Web server 22 and can be downloaded from a remote server. Protection of the configuration file is provided by the remote server and the Web server 22 through the password and the user list. By operably connecting the Web server 22 with the IED 20 through the interconnection bus 24, the Web server 22 provides a direct connection for the IED to the Internet 4.
  • [0031]
    An IED 20 is any device having a communication input and/or output capable of interfacing with the Web server 22 or other devices. The IED 20 refers to devices such as sensors, actuators, smart power equipment (e.g. intelligent circuit breakers, switch gears and power transformers), protection units, electronic meters, fault detectors, substation control units, RTUs and any other like device as well as traditional I/O modules for PLC systems.
  • [0032]
    The Web server 22 provides both a client and a server interface. All signals between the IED 20 and the Web server 22 are through the interconnection bus 24. The interconnection signals include addressing, control, data, and power. The client interface allows the IED to send commands to a remote node over the Internet, and the server interface allows for processing commands that originate from the remote node. Substantially real time control of the IED 20 from a remote HMI is possible by controlling the data flow through the Web server 22.
  • [0033]
    The Web server 22 functions as a node on the communication (TCP/IP) network 30 allowing it to send commands to the IED 20 and receive the responses. Although the TCP/IP network 30 of the preferred embodiment is an Ethernet network, other high level protocols can be used. A user can control and view configuration information and run-time data of the IED 20 through the Internet 4 by using a Web browser 6 at the remote location.
  • [0034]
    [0034]FIG. 4 is a block diagram illustrating the Web interface module 21 in greater detail. The Web interface module 21 includes various components to perform its functions: connection to the TCP/IP network 30, connection to the IED 20, and application functions (standard Web access, file transfer for software update and records uploading, and monitoring and control access to the IED).
  • [0035]
    Connection to the TCP/IP network 30 is through a network driver 33. In the preferred embodiment of the present invention, to a SAS, the IED 20 is operably connected to an Ethernet local network and the network driver 33, is an Ethernet driver. FIG. 5 depicts the IED 20 operably connected to the SAS and the Internet 4. The connection to the Internet 4 is via an Ethernet connection 37. For a smaller control system such as a pole-top control system, the IED 20 may be connected via a phone modem to regular telephone wires. In this configuration, the Ethernet driver will be replaced by a PPP (Point-To-Point Protocol) or SLIP (Serial Line Internet Protocol) driver. The following description refers to the Ethernet option. The connection to the TCP/IP network 30 is through an Ethernet driver 33 and the connection to the IED 20 is through an interface driver 38. Standard Web access is provided by a HTTP server task 40. File transfer service is provided by a FTP server task 41. And monitoring and control access to the IED 20 is provided by a control task 42. Other possible protocols/interfaces include placing the signal on electrical power lines.
  • [0036]
    A substantially real time operating system (RTOS) 32 controls the interaction between the components. The RTOS 32 allocates processor time on a central processor unit (CPU) 31 to various tasks, provides memory management, and provides a set of message services and signal services. The message and signal services allow for communication between tasks, and between drivers and a task. The RTOS can be a custom design or commercially available, i.e., PSOS from ISI or VxWorks from Wind River Systems.
  • [0037]
    Connection to the TCP/IP network 30 is through an Ethernet driver 33 which transmits and receives messages at a rate of 10 Mb/s (megabits per second) or faster via an Ethernet controller 34. It is contemplated that in the future, Ethernet controllers 34 capable of speeds of 1 Gb/s (gigabits per second) and faster can be used. The physical connection over which communication is facilitated can be over a fiber optic cable or a twisted pair-type copper wire. Connection to the IED 20 is through an interface driver 38 which transmits and receives data via a dual port memory 39 and an interconnection bus 24.
  • [0038]
    In addition to providing a standard interface to a remote Web browser through the Internet 4, the interface module 21 also enables the IED 20 to exchange control messages with other IEDs or control units connected either on the local network 30, or on the Internet network 4 at a remote location. This communication is related to the control task 42 and will be processed using the industrial standard Modbus over TCP/IP. The TC/IP stack 11 must provide support for both broad range TCP/IP messages for the Internet World and Modbus control messages. Alternatively, the TCP/IP stack 11 can be replaced by a dual TCP/IP stack. The dual TCP/IP stack comprises a first TCP/IP stack that provides support for a broad range of TCP/IP messages (related to the HTTP task 40 and the FTP task 41). A second TCP/IP stack, a “smart stack,” manages the high priority Modbus control messages (related to the control task 42). For outgoing TCP/IP messages, the appropriate TCP/IP stack is chosen by the calling HTTP, FTP or control tasks. For incoming TCP/IP messages, the TCP/IP message is intercepted and examined to determine its type. If the incoming message is a Modbus control message, the message is then delivered to the “smart stack.” If the incoming message is not a Modbus control message, the first TCP/IP stack handles the message. In this manner, Modbus TCP/IP control messages are managed more quickly and efficiently than a non-Modbus control message managed by the single TCP/IP stack.
  • [0039]
    The Web interface module 21 has a unique global address 9 allowing it to be accessed by other devices on the network. The Ethernet driver 33 manages transmit 36 and receive 37 buffers in memory 35 and interfaces with the Ethernet controller 34. The transmit 36 and receive 37 buffers are shared both by the Ethernet controller 34 and the Ethernet driver 33. The Ethernet driver 33 also provides a transmit request interface and a receive indication interface to the TCP/IP stack 11. The Ethernet controller 34 provides a transmit queue interface, a receive queue interface, and generates interrupts on completion of transmitting a message and on receiving a new message. The Ethernet driver 33 places receive buffers in the receive queue. In the interrupt routine, the Ethernet driver 33 examines the receive queue. If any messages are in the receive queue, the Ethernet driver passes the receive buffer to the TCP/IP stack 11. The TCP/IP stack 11 copies the buffer and calls the Ethernet driver 33 to return the buffer and place the returned buffer back into the receive queue.
  • [0040]
    The TCP/IP stack 11 calls the Ethernet driver 33 to transmit a message. The Ethernet driver 33 allocates a buffer from the shared memory 35, copies the message into the buffer, and places the buffer into the Ethernet controller 34 transmit queue. In the interrupt routine, the Ethernet driver 33 examines the transmit queue, processes the transmission and frees the transmitted buffers.
  • [0041]
    The TCP/IP network 30 enables the IED 20 to exchange control messages with other IEDs or remote control units. In one direction, the control task 42 allows a remote application to issue a request command to the IED 20 and to receive its response. In the other direction, the control task 42 allows the IED 20 to send data to a remote application and to obtain responses.
  • [0042]
    The interface driver 38 provides a transmit request service to the IED 20 and receives indication services from the IED. The communication with the IED 20 is based on a dual port memory 39. The dual port memory 39 allows a full-duplex and bi-directional communication. The dual port memory 39 is split into two zones. One zone is dedicated to the incoming side for communication from the IED 20 and the other zone is dedicated to the outgoing side for communication to the IED 20. Writing to a specified location will cause an interrupt. For the incoming side, the IED 20 first writes a message in the dual port memory 39 and then triggers an interrupt. In the interrupt routine, the interface driver 38 reads the memory to get the message from the IED 20. According to the type of the message, the interface driver 39 uses a call back routine mechanism to pass the message to either the HTTP task 40, the FTP task 41 or the control task 42. For the outgoing side, the HTTP task 40, the FTP task 41 or the control task 42 call the interface driver 38 to transmit a message to the IED 20. The interface driver 38 writes the message in the dual port memory 39 and then triggers an interrupt to the IED processor.
  • [0043]
    The control task 42 processes a message originating from a control unit or another IED 20 at the remote location. The control task 42 interfaces with the interface driver 38, the TCP/IP stack 11, and the RTOS message services. The control task 42 calls the interface driver 38 and passes to it the message with a reference to the associated call back routine for the response. The call back routine uses the RTOS message services to send the response to the control task 42. A TCP/IP stack 11 signal function also uses the RTOS 32 IPC services to send a TCP/IP event to the control task 42. The control task 42 can handle multiple transactions and connections. The control task 42 maintains a list of connection machines and each connection machine contains a list of transaction machines. The connection machines manage the connection and the transaction machines manage the incoming messages and responses.
  • [0044]
    After performing an initialization, the control task 42 enters a loop and calls the RTOS 32 to receive a message. The RTOS 32 blocks the control task 42 until there is a message or there is a time out. The control task 42 either receives a message from the TCP/IP task's 11 signal handler from the interface driver 38 or it times out. The control task 42 processes the message or the time-out and reenters the loop. If the message received from the RTOS 32 is from the TCP/IP task's 11 signal handler, the control task 42 determines if the event is a connection request, a close socket event or a receive data event. Based on the TCP/IP event, the control task 42 uses the connection machine and transaction machine to advance the transaction. Received data for a message may occur over several receive data events and the transaction machine assembles the events into a request message. When the response message is received from the RTOS 32, the control task 42 locates the connection and transaction machine to send the response.
  • [0045]
    When the control task 42 requests the TCP/IP stack 11 to transmit a message, not all of the message may be transmitted. This occurs when the remote node is flow controlled. In this case, the associated connection is placed into a blocked state. Every time the control task 42 calls the RTOS 32 to receive a message, it searches the list of connection machines that are flowed controlled. For each blocked connection, the control task 42 tries to advance the transaction state machines.
  • [0046]
    After the control task 42 has parsed the header of an incoming message, it attempts to allocate a structure to pass the message to the interface driver 38. If the control task 42 is already processing a predetermined number of outstanding messages, the attempt fails and the connection is placed into a blocked state. The body of the message is not read from the TCP/IP stack 11. As a result, the TCP/IP stack may apply flow control to the remote node. When one of the other messages is complete, the free data structure event causes a blocked connection machine to continue processing the incoming message.
  • [0047]
    The FTP task 41 enables file transfers with the IED 20 through the communicating network 30. The FTP task 41 interfaces with the TCP/IP stack 11 and the interface driver 38. The FTP task 41 receives a FTP request from the TCP/IP stack 11. To process the request, the FTP task 41 may access the IED 20 through the interface driver 38 and interconnection bus 24. The FTP task 42 sends back the response over the TCP/IP stack 11. A framework is supplied by the RTOS 32. The framework creates the FTP task, accepts connection, and parses the FTP request. After parsing the request, the framework calls the RTOS 32 to process the request. Processing the request involves determining the request type and processing the actual request. A subset of FTP is implemented in order to process file transfer operations. A download request allows a user to update the operating software of the IED 20. An upload request enables a user to get measurement, event and disturbance/fault records provided by the IED 20. The processing of TCP, FTP and HTTP stacks are well known in the industry.
  • [0048]
    The HTTP task 40 interfaces with the TCP/IP stack 11 and the interface driver 38. The HTTP server task 40 receives a HTTP request from the TCP/IP stack 11. To process the request, the HTTP task 40 may access the IED 20 through the interface driver 38 and interconnection bus 24. The HTTP server task 40 sends back the response over the TCP/IP stack 11. The framework is supplied by the RTOS 32. The framework creates the HTTP task, accepts connection, and parses the HTTP request. After parsing the request, the framework calls the RTOS 32 to process the request. Processing the request involves determining the request type and processing the actual request. The different request types allow a user to acquire a snapshot of the IED 20 operations by allowing a view of various data within the IED 20. These request types also include: display of the IED 20 configuration; health statistics; readings; interconnection bus configuration; Ethernet configuration and statistics, and others. Images can be also displayed on the various HTML pages by means of an image file, e.g., a “gif” file. Table 1 shows the various HTML pages the user can access to:
    TABLE 1
    Home Page/Login
    Readings
    Parameters Setup
    Quality Information
    Monitoring and Diagnoses
    IED Configuration and Statistics
    Ethernet Configuration and Statistics
    Security and Administration
  • [0049]
    The Home Page contains hyperlinks to several pages of data. This page will display the identification of the IED 20. A user identification and password are required to access to the linked pages.
  • [0050]
    The Readings page can display run time data about the process, i.e.,
  • [0051]
    measurements: phase currents, voltages, tripping current, frequency, real and reactive power, energy counters, temperature, etc;
  • [0052]
    status: circuit breaker open/close positions, earthing switch, protections enabled/disabled, recloser status, etc; and,
  • [0053]
    events and alarms: alarm protection, tripping protection, pole pressure, Buchholtz, etc.
  • [0054]
    The Parameters Setup page can display the current value of the functions parameters, i.e., protection tripping curve, threshold current, threshold voltage, tripping time delay, recloser activation mode, etc. The IED 20 may have several sets of parameters. This page enables the user to switch the active set to another defined parameters set. Access to this page is protected by a password.
  • [0055]
    The Quality information page can display voltage sag and swell, harmonics and wave captures.
  • [0056]
    The Monitoring and Diagnoses page can display information for network diagnosis and predictive maintenance, such as tripping current, cumulative breaking current, breaker opening/closing time, number of CB operations, disturbance records, etc.
  • [0057]
    The IED Configuration and Statistics page can display the configuration of the IED 20 and give diagnostics information for troubleshooting or performance analysis. In the case of a modular IED 20, the first page provides access to a series of linked pages related to the IED modules.
  • [0058]
    The Ethernet page can display information about the configuration of the Ethernet Network Interface 8. Diagnostic counters related to communication on the network can also displayed.
  • [0059]
    The Security and Administration page can enable an administrator to configure users' passwords and access rights, i.e., no access, view only access, full access; to another HTML.
  • [0060]
    The HTML pages provide a client/server user interface. This interface is performed by requests and responses exchanged between the browser 6 and the Web server 22. The RTOS 32 processes these requests and responds by receiving and sending HTTP messages through the TCP/IP stack 11. Processing some of these requests involves reading and writing within the IED 20. To perform these operations, the RTOS 32 sends a request to the interface driver 38 and uses an event signal mechanism and an event flag to determine when the request is complete. After sending the request to the interface driver 38, the RTOS 32 waits for an event flag to be sent. When the interface driver 38 completes the request, it calls a call back routine that sets the event flag. The RTOS 32 then resumes processing the request.
  • [0061]
    While the specific embodiments have been illustrated and described, numerous modifications are possible without departing from the scope or spirit of the present invention.
Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3971000 *Aug 13, 1975Jul 20, 1976The Foxboro CompanyComputer-directed process control system with interactive display functions
US4251858 *Mar 6, 1979Feb 17, 1981The Boeing CompanyPaging, status monitoring and report compiling system for support, maintenance and management of operator-supervised automatic industrial machines
US4319338 *Dec 12, 1979Mar 9, 1982Allen-Bradley CompanyIndustrial communications network with mastership determined by need
US4688167 *Sep 27, 1984Aug 18, 1987Wang Laboratories, Inc.Screen manager for data processing system
US4701845 *Oct 25, 1984Oct 20, 1987Unisys CorporationUser interface processor for computer network with maintenance and programmable interrupt capability
US4845644 *Jun 9, 1987Jul 4, 1989International Business Machines CorporationData display system
US4858152 *Jan 23, 1987Aug 15, 1989International Business Machines Corp.Operator access to monitoring applications
US4897777 *Apr 11, 1988Jan 30, 1990Square D CompanyPeer-to-peer register exchange controller for PLCS
US4912623 *Apr 11, 1988Mar 27, 1990Square D CompanyMultiple processor communications system
US4937777 *Oct 7, 1987Jun 26, 1990Allen-Bradley Company, Inc.Programmable controller with multiple task processors
US4949274 *May 18, 1988Aug 14, 1990Omega Engineering, Inc.Test meters
US4953074 *Jul 6, 1988Aug 28, 1990Hitachi, Ltd.Function-distributed control apparatus
US4974151 *Dec 11, 1987Nov 27, 1990International Business Machines CorporationConfiguration capability for devices in an open system having the capability of adding or changing devices by user commands
US4979107 *Dec 11, 1987Dec 18, 1990International Business Machines CorporationModification of device configuration wherein the system specifies and prompts the user with only parameters required to be changed
US4992926 *Oct 17, 1988Feb 12, 1991Square D CompanyPeer-to-peer register exchange controller for industrial programmable controllers
US5012402 *Dec 16, 1988Apr 30, 1991Murata Kikai Kabushiki KaishaSystem for modifying a machine's program at a remote location
US5023770 *Apr 11, 1988Jun 11, 1991Square D CompanyHigh-speed press control system
US5047959 *Sep 13, 1988Sep 10, 1991Square D CompanyFlexible data display
US5072412 *Mar 25, 1987Dec 10, 1991Xerox CorporationUser interface with multiple workspaces for sharing display system objects
US5109487 *Oct 21, 1988Apr 28, 1992Hitachi, Ltd.System and method for distributed data processing utilizing distributed display format
US5122948 *Jun 28, 1990Jun 16, 1992Allen-Bradley Company, Inc.Remote terminal industrial control communication system
US5131092 *Sep 1, 1989Jul 14, 1992Square D CompanyCommunication system enabling programmable logic controllers access to host computer tasks and host computer access to programmable logic controllers without polling
US5134574 *Feb 27, 1990Jul 28, 1992The Foxboro CompanyPerformance control apparatus and method in a processing plant
US5151896 *Sep 21, 1990Sep 29, 1992Bowman Donald JModular digital telephone system with fully distributed local switching and control
US5151978 *Mar 22, 1990Sep 29, 1992Square D CompanyLan interface which permits a host computer to obtain data without interrupting a ladder program executing in the interface
US5157595 *Mar 8, 1991Oct 20, 1992El Paso Technologies, CompanyDistributed logic control system and method
US5159673 *Mar 11, 1992Oct 27, 1992Square D CompanyApparatus for networking programmable logic controllers to host computers
US5161211 *Oct 16, 1989Nov 3, 1992Hitachi, Ltd.Method and system of specification processing
US5165030 *Mar 10, 1989Nov 17, 1992International Business Machines CorporationMethod and system for dynamic creation of data stream based upon system parameters and operator selections
US5179700 *Jul 18, 1990Jan 12, 1993International Business Machines CorporationUser interface customization apparatus
US5225974 *Oct 30, 1990Jul 6, 1993Allen-Bradley Company, Inc.Programmable controller processor with an intelligent functional module interface
US5245704 *Mar 22, 1990Sep 14, 1993Square D CompanySystem for sharing data between microprocessor based devices
US5251302 *Dec 26, 1991Oct 5, 1993Square D CompanyNetwork interface board having memory mapped mailbox registers including alarm registers for storing prioritized alarm messages from programmable logic controllers
US5278834 *May 26, 1992Jan 11, 1994Alcatel Network Systems, Inc.Method for implementing a data communication protocol stack
US5283861 *Aug 31, 1990Feb 1, 1994International Business Machines CorporationRemote control of a local processor console
US5297257 *Apr 15, 1991Mar 22, 1994Allen-Bradley Company, Inc.Distributing a real-time control program to a plurality of input/output nodes
US5307463 *Dec 7, 1992Apr 26, 1994Allen-Bradley Company, Inc.Programmable controller communication module
US5321829 *Jul 20, 1990Jun 14, 1994Icom, Inc.Graphical interfaces for monitoring ladder logic programs
US5343469 *Jun 11, 1991Aug 30, 1994Nec CorporationCommunication system and communication devices having lock function
US5349675 *Sep 4, 1990Sep 20, 1994International Business Machines CorporationSystem for directly displaying remote screen information and providing simulated keyboard input by exchanging high level commands
US5386524 *Apr 16, 1992Jan 31, 1995Digital Equipment CorporationSystem for accessing information in a data processing system
US5398336 *Jul 16, 1993Mar 14, 1995Consilium, Inc.Object-oriented architecture for factory floor management
US5406473 *Jul 21, 1993Apr 11, 1995Toyota Jidosha Kabushiki KaishaProgrammable controller
US5410730 *Nov 23, 1993Apr 25, 1995Rosemount Inc.Interface controller for matching a process address field from a plurality of fields and generating a corresponding device address field
US5420977 *Oct 12, 1993May 30, 1995Vanderbilt UniversityMultiple aspect operator interface for displaying fault diagnostics results in intelligent process control systems
US5430730 *Sep 14, 1993Jul 4, 1995Rolm CompanyMethod for building a sub-network in a distributed voice messaging system
US5440699 *Jul 29, 1994Aug 8, 1995Compaq Computer CorporationSystem by which a remote computer receives screen images from and transmits commands to a host computer
US5446868 *Sep 11, 1992Aug 29, 1995R. J. Reynolds Tobacco CompanyNetwork bridge method and apparatus
US5471617 *Aug 21, 1992Nov 28, 1995Compaq Computer CorporationComputer management system and associated management information base
US5528503 *Apr 30, 1993Jun 18, 1996Texas Instruments IncoporatedIntegrated automation development system and method
US5598536 *Aug 9, 1994Jan 28, 1997Shiva CorporationApparatus and method for providing remote users with the same unique IP address upon each network access
US5604749 *Oct 13, 1995Feb 18, 1997Alcatel N.V.High capacity data communication network and network node suitable for the same
US5611059 *Sep 2, 1994Mar 11, 1997Square D CompanyPrelinked parameter configuration, automatic graphical linking, and distributed database configuration for devices within an automated monitoring/control system
US5613115 *Dec 9, 1991Mar 18, 1997Total Control Products, Inc.Method for using PLC programming information to generate secondary functions such as diagnostics and operator interface
US5623652 *Jul 25, 1994Apr 22, 1997Apple Computer, Inc.Method and apparatus for searching for information in a network and for controlling the display of searchable information on display devices in the network
US5625781 *Oct 31, 1995Apr 29, 1997International Business Machines CorporationItinerary list for interfaces
US5699350 *Oct 6, 1995Dec 16, 1997Canon Kabushiki KaishaReconfiguration of protocol stacks and/or frame type assignments in a network interface device
US5734831 *Apr 26, 1996Mar 31, 1998Sun Microsystems, Inc.System for configuring and remotely administering a unix computer over a network
US5764932 *Dec 23, 1996Jun 9, 1998Intel CorporationMethod and apparatus for implementing a dual processing protocol between processors
US5768119 *Apr 12, 1996Jun 16, 1998Fisher-Rosemount Systems, Inc.Process control system including alarm priority adjustment
US5790802 *Mar 29, 1995Aug 4, 1998Koninklijke Ptt Nederland N.V.Method for exchanging a message between systems in which the message comprises an information element of first type and information element of second type
US5793954 *Dec 20, 1995Aug 11, 1998Nb NetworksSystem and method for general purpose network analysis
US5802290 *Dec 12, 1996Sep 1, 1998Virtual Computer CorporationComputer network of distributed virtual computers which are EAC reconfigurable in response to instruction to be executed
US5805442 *May 30, 1996Sep 8, 1998Control Technology CorporationDistributed interface architecture for programmable industrial control systems
US5862391 *Apr 3, 1996Jan 19, 1999General Electric CompanyPower management control system
US5903559 *Dec 20, 1996May 11, 1999Nec Usa, Inc.Method for internet protocol switching over fast ATM cell transport
US5913040 *Aug 22, 1995Jun 15, 1999Backweb Ltd.Method and apparatus for transmitting and displaying information between a remote network and a local computer
US5915087 *Dec 12, 1996Jun 22, 1999Secure Computing CorporationTransparent security proxy for unreliable message exchange protocols
US5950006 *Nov 5, 1997Sep 7, 1999Control Technology CorporationObject-oriented programmable controller
US5975737 *Jul 9, 1998Nov 2, 1999Control Technology CorporationDistributed interface architecture for programmable industrial control systems
US5982362 *May 6, 1997Nov 9, 1999Control Technology CorporationVideo interface architecture for programmable industrial control systems
US5997167 *May 1, 1997Dec 7, 1999Control Technology CorporationProgrammable controller including diagnostic and simulation facilities
US6016523 *Mar 9, 1998Jan 18, 2000Schneider Automation, Inc.I/O modular terminal having a plurality of data registers and an identification register and providing for interfacing between field devices and a field master
US6028866 *Dec 11, 1996Feb 22, 2000U.S. Philips CorporationSystem for communicating between a group of apparatuses
US6032203 *Apr 7, 1997Feb 29, 2000General Electric CompanySystem for interfacing between a plurality of processors having different protocols in switchgear and motor control center applications by creating description statements specifying rules
US6058251 *Sep 24, 1996May 2, 2000Fujitsu LimitedData transmission system
US6061721 *Oct 6, 1997May 9, 2000Sun Microsystems, Inc.Bean-based management system
US6061742 *Oct 10, 1997May 9, 2000Nortel Networks CorporationComputer network adaptor
US6073174 *Mar 21, 1997Jun 6, 2000Bristish TelecommunicationsRemote access systems
US6108782 *Jun 24, 1997Aug 22, 20003Com CorporationDistributed remote monitoring (dRMON) for networks
US6122670 *Oct 30, 1997Sep 19, 2000Tsi Telsys, Inc.Apparatus and method for constructing data for transmission within a reliable communication protocol by performing portions of the protocol suite concurrently
US6151640 *Jan 23, 1998Nov 21, 2000Schneider Automation Inc.Control I/O module having the ability to interchange bus protocols for bus networks independent of the control I/O module
US6195425 *Nov 21, 1996Feb 27, 2001Bell Atlantic Network Services, Inc.Telecommunications system with wide area internetwork control
US6209048 *Feb 9, 1996Mar 27, 2001Ricoh Company, Ltd.Peripheral with integrated HTTP server for remote access using URL's
US6212576 *Jan 27, 1997Apr 3, 2001Optimay CorporationOperating system interface for use with multitasking GSM protocol stacks
US6263487 *Jan 16, 1997Jul 17, 2001Siemens AgProgrammable controller
US6266713 *Sep 24, 1999Jul 24, 2001General Electric CompanyField upgradeable dynamic data exchanger server
US6317789 *Mar 23, 1999Nov 13, 2001Backweb, Ltd.Method and apparatus for transmitting and displaying information between a remote network and a local computer
US6581101 *Feb 7, 2001Jun 17, 2003Canon Kabushiki KaishaApparatus for generating and transferring managed device description file
US6792337 *Dec 17, 2001Sep 14, 2004Power Measurement Ltd.Method and system for master slave protocol communication in an intelligent electronic device
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6671635 *Feb 23, 2001Dec 30, 2003Power Measurement Ltd.Systems for improved monitoring accuracy of intelligent electronic devices
US6751562Mar 22, 2001Jun 15, 2004Power Measurement Ltd.Communications architecture for intelligent electronic devices
US6792337Dec 17, 2001Sep 14, 2004Power Measurement Ltd.Method and system for master slave protocol communication in an intelligent electronic device
US6944555Jun 29, 2001Sep 13, 2005Power Measurement Ltd.Communications architecture for intelligent electronic devices
US6961641Nov 28, 2000Nov 1, 2005Power Measurement Ltd.Intra-device communications architecture for managing electrical power distribution and consumption
US6988025Jul 24, 2003Jan 17, 2006Power Measurement Ltd.System and method for implementing XML on an energy management device
US6990395Oct 21, 2003Jan 24, 2006Power Measurement Ltd.Energy management device and architecture with multiple security levels
US7058420 *Feb 21, 2003Jun 6, 2006Korea Electric Power CorporationPower automation system using trunked radio system network and control method thereof
US7085824 *Feb 23, 2001Aug 1, 2006Power Measurement Ltd.Systems for in the field configuration of intelligent electronic devices
US7089089Jul 16, 2004Aug 8, 2006Power Measurement Ltd.Methods and apparatus for retrieving energy readings from an energy monitoring device
US7127328Nov 29, 2004Oct 24, 2006Power Measurement Ltd.System and method for federated security in an energy management system
US7174261Mar 18, 2004Feb 6, 2007Power Measurement Ltd.Power line sensors and systems incorporating same
US7188003Jan 5, 2004Mar 6, 2007Power Measurement Ltd.System and method for securing energy management systems
US7216043Jan 9, 2003May 8, 2007Power Measurement Ltd.Push communications architecture for intelligent electronic devices
US7248978Feb 2, 2005Jul 24, 2007Power Measurement Ltd.System and method for routing power management data via XML firewall
US7337217 *Jul 19, 2001Feb 26, 2008Samsung Electronics Co., Ltd.Architecture for home network on world wide web
US7349967 *Jul 19, 2001Mar 25, 2008Samsung Electronics Co., Ltd.Architecture for home network on world wide web with private-public IP address/URL mapping
US7415368Nov 13, 2003Aug 19, 2008Power Measurement Ltd.Intelligent electronic device having network access
US7447760Jun 16, 2006Nov 4, 2008Power Measurement Ltd.Systems for in the field configuration of intelligent electronic devices
US7590702 *Nov 26, 2001Sep 15, 2009Schneider Automation Inc.Messaging application layer over ethernet to transport layer (TCP) communications method and apparatus for a modular terminal input/output system
US7631057Dec 8, 2009Bea Systems, Inc.Two-phase deployment framework
US7664869 *Oct 31, 2007Feb 16, 2010Schneider Automation Inc.Web interface to a device and an electrical network control system
US7734380 *Sep 19, 2003Jun 8, 2010Power Measurement Ltd.Push communications architecture for intelligent electronic devices
US7747733Jun 29, 2010Electro Industries/Gauge TechPower meter having multiple ethernet ports
US7761910Jul 20, 2010Power Measurement Ltd.System and method for assigning an identity to an intelligent electronic device
US7827316Dec 27, 2005Nov 2, 2010Siemens AktiengesellschaftAutomation network, access service proxy for an automation network and method for transmitting operating data between a programmable controller and a remote computer
US7899912 *Aug 21, 2001Mar 1, 2011International Business Machines CorporationPervasive, personal data interactivity over voice-grade circuit-switched cellular networks
US7917314Mar 29, 2011Power Measurement Ltd.Intelligent electronic device having network access
US7979221Sep 6, 2007Jul 12, 2011Power Measurement Ltd.Intelligent electronic device having network access
US7983795Jul 19, 2011Kurt JosephsonNetworked electrical interface
US8022690Jun 29, 2009Sep 20, 2011Electro Industries/Gauge TechIntelligent electronic device for providing broadband internet access
US8086664 *Dec 27, 2011Siemens Industry, Inc.Method and apparatus for programming programmable controllers and generating configuration data from a centralized server
US8116072Nov 9, 2009Feb 14, 2012Electro Industries/Gauge TechCurrent inputs interface for an electrical device
US8175089 *Sep 30, 2005May 8, 2012Rockwell Automation Technologies, Inc.Extended address space capability for an industrial protocol
US8176174Jun 28, 2010May 8, 2012Electro Industries/Gauge TechPower meter having multiple ethernet ports
US8239066Oct 21, 2009Aug 7, 2012Lennox Industries Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8255086Aug 28, 2012Lennox Industries Inc.System recovery in a heating, ventilation and air conditioning network
US8260444Feb 17, 2010Sep 4, 2012Lennox Industries Inc.Auxiliary controller of a HVAC system
US8271836 *Sep 27, 2007Sep 18, 2012Microsoft CorporationCapturing diagnostics in web browser applications
US8295981Oct 23, 2012Lennox Industries Inc.Device commissioning in a heating, ventilation and air conditioning network
US8352080Jan 8, 2013Lennox Industries Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8352081Jan 8, 2013Lennox Industries Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8433446Oct 21, 2009Apr 30, 2013Lennox Industries, Inc.Alarm and diagnostics system and method for a distributed-architecture heating, ventilation and air conditioning network
US8437877Oct 21, 2009May 7, 2013Lennox Industries Inc.System recovery in a heating, ventilation and air conditioning network
US8437878May 7, 2013Lennox Industries Inc.Alarm and diagnostics system and method for a distributed architecture heating, ventilation and air conditioning network
US8442693Oct 21, 2009May 14, 2013Lennox Industries, Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8452456May 28, 2013Lennox Industries Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8452906May 28, 2013Lennox Industries, Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8463442Jun 11, 2013Lennox Industries, Inc.Alarm and diagnostics system and method for a distributed architecture heating, ventilation and air conditioning network
US8463443Jun 11, 2013Lennox Industries, Inc.Memory recovery scheme and data structure in a heating, ventilation and air conditioning network
US8467885Jul 15, 2011Jun 18, 2013Kurt JosephsonNetworked electrical interface
US8543243Oct 21, 2009Sep 24, 2013Lennox Industries, Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8548630Oct 21, 2009Oct 1, 2013Lennox Industries, Inc.Alarm and diagnostics system and method for a distributed-architecture heating, ventilation and air conditioning network
US8560125Oct 21, 2009Oct 15, 2013Lennox IndustriesCommunication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8564400Oct 21, 2009Oct 22, 2013Lennox Industries, Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8582426 *May 16, 2007Nov 12, 2013Abb Research Ltd.Reception of redundant and non-redundant frames
US8600558Oct 21, 2009Dec 3, 2013Lennox Industries Inc.System recovery in a heating, ventilation and air conditioning network
US8600559Oct 21, 2009Dec 3, 2013Lennox Industries Inc.Method of controlling equipment in a heating, ventilation and air conditioning network
US8615326Oct 21, 2009Dec 24, 2013Lennox Industries Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8631126Nov 23, 2011Jan 14, 2014Access Business Group International LlcSystem and markup language for information extraction from stand-alone devices in webspace
US8655490Oct 21, 2009Feb 18, 2014Lennox Industries, Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8655491Oct 21, 2009Feb 18, 2014Lennox Industries Inc.Alarm and diagnostics system and method for a distributed architecture heating, ventilation and air conditioning network
US8661165Oct 21, 2009Feb 25, 2014Lennox Industries, Inc.Device abstraction system and method for a distributed architecture heating, ventilation and air conditioning system
US8694164Oct 21, 2009Apr 8, 2014Lennox Industries, Inc.Interactive user guidance interface for a heating, ventilation and air conditioning system
US8725298Oct 21, 2009May 13, 2014Lennox Industries, Inc.Alarm and diagnostics system and method for a distributed architecture heating, ventilation and conditioning network
US8744629Oct 21, 2009Jun 3, 2014Lennox Industries Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US8761945Aug 30, 2012Jun 24, 2014Lennox Industries Inc.Device commissioning in a heating, ventilation and air conditioning network
US8762666Oct 21, 2009Jun 24, 2014Lennox Industries, Inc.Backup and restoration of operation control data in a heating, ventilation and air conditioning network
US8774210Oct 21, 2009Jul 8, 2014Lennox Industries, Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8788100Oct 21, 2009Jul 22, 2014Lennox Industries Inc.System and method for zoning a distributed-architecture heating, ventilation and air conditioning network
US8788104Jul 30, 2012Jul 22, 2014Lennox Industries Inc.Heating, ventilating and air conditioning (HVAC) system with an auxiliary controller
US8798796Oct 21, 2009Aug 5, 2014Lennox Industries Inc.General control techniques in a heating, ventilation and air conditioning network
US8802981Oct 21, 2009Aug 12, 2014Lennox Industries Inc.Flush wall mount thermostat and in-set mounting plate for a heating, ventilation and air conditioning system
US8849470 *Apr 27, 2011Sep 30, 2014Abb Technology AgMethod for performing service/maintenance on a switchgear panel, and related switchgear panel
US8855825Oct 21, 2009Oct 7, 2014Lennox Industries Inc.Device abstraction system and method for a distributed-architecture heating, ventilation and air conditioning system
US8874815Oct 21, 2009Oct 28, 2014Lennox Industries, Inc.Communication protocol system and method for a distributed architecture heating, ventilation and air conditioning network
US8892797Oct 21, 2009Nov 18, 2014Lennox Industries Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8907657Sep 19, 2011Dec 9, 2014Electro Industries/Gauge TechIntelligent electronic device for providing broadband internet access
US8910249 *Mar 28, 2012Dec 9, 2014Schneider Electric Energy GmbhInterface device for an intelligent electronic device and method of operating an interface device
US8977794Oct 21, 2009Mar 10, 2015Lennox Industries, Inc.Communication protocol system and method for a distributed-architecture heating, ventilation and air conditioning network
US8994539Oct 21, 2009Mar 31, 2015Lennox Industries, Inc.Alarm and diagnostics system and method for a distributed-architecture heating, ventilation and air conditioning network
US9152155Oct 21, 2009Oct 6, 2015Lennox Industries Inc.Device abstraction system and method for a distributed-architecture heating, ventilation and air conditioning system
US9194720May 3, 2012Nov 24, 2015Electro Industries/Gauge TechPower meter having multiple Ethernet ports
US9261888Oct 21, 2009Feb 16, 2016Lennox Industries Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US9268345Oct 21, 2009Feb 23, 2016Lennox Industries Inc.System and method of use for a user interface dashboard of a heating, ventilation and air conditioning network
US9325517Oct 21, 2009Apr 26, 2016Lennox Industries Inc.Device abstraction system and method for a distributed-architecture heating, ventilation and air conditioning system
US20020065960 *Nov 26, 2001May 30, 2002Swales Andrew G.Messaging application layer (MODBUS) over ethernet to transport layer (TCP) communications method and apparatus for a modular terminal input/output system
US20020120723 *Feb 23, 2001Aug 29, 2002Forth J. BradfordSystems for in the field configuration of intelligent electronic devices
US20030001883 *Jul 19, 2001Jan 2, 2003Samsung Electronics Co., Ltd.Architecture for home network on world wide web with private-public IP address/URL mapping
US20030009537 *Jul 19, 2001Jan 9, 2003Samsung Electronics Co., Ltd.Architecture for home network on world wide web
US20030041119 *Aug 21, 2001Feb 27, 2003International Business Machines CorporationPervasive, personal data interactivity over voice-grade circuit-switched cellular networks
US20030055909 *Aug 24, 2001Mar 20, 2003Stephan HartwigPluggable server module for wireless remote controlling of devices
US20030061274 *Sep 24, 2001Mar 27, 2003George LoMethod and apparatus for programming programmable controllers and generating configuration data from a centralized server
US20030162538 *Feb 21, 2003Aug 28, 2003Korea Electric Power CorporationPower automation system using trunked radio system network and control method thereof
US20030204756 *Jan 9, 2003Oct 30, 2003Ransom Douglas S.Push communications architecture for intelligent electronic devices
US20040103144 *Nov 14, 2003May 27, 2004Hussein SallamSystems and methods for communicating with devices as Web Services
US20040107025 *Jul 24, 2003Jun 3, 2004Ransom Douglas S.System and method for implementing XML on an energy management device
US20040122833 *Nov 13, 2003Jun 24, 2004Forth J. BradfordIntelligent electronic device having network access
US20040138787 *Oct 21, 2003Jul 15, 2004Power Measurement Ltd.System and method for implementing XML on an energy management device
US20040138835 *Sep 19, 2003Jul 15, 2004Power Measurement Ltd.Push communications architecture for intelligent electronic devices
US20040162642 *Jul 31, 2002Aug 19, 2004Marcus GasperThin client power management system and method
US20040183522 *Mar 18, 2004Sep 23, 2004Power Measurement Ltd.Power line sensors and systems incorporating same
US20050065743 *Jul 16, 2004Mar 24, 2005Cumming Daniel A.Methods and apparatus for retrieving energy readings from an energy monitoring device
US20050116814 *Oct 25, 2004Jun 2, 2005Rodgers Barry N.Intelligent power management control system
US20050138432 *Feb 2, 2005Jun 23, 2005Ransom Douglas S.System and method for routing power management via XML firewall
US20050144437 *Nov 30, 2004Jun 30, 2005Ransom Douglas S.System and method for assigning an identity to an intelligent electronic device
US20060230394 *Jun 16, 2006Oct 12, 2006Power Measurement Ltd.Systems for in the field configuration of intelligent electronic devices
US20060271244 *Jul 31, 2006Nov 30, 2006Power Measurement Ltd.Methods and apparatus for retrieving energy readings from an energy monitoring device
US20070076724 *Sep 30, 2005Apr 5, 2007Rockwell Automation Technologies, Inc.Extended address space capability for an industrial protocol
US20070136010 *Jan 12, 2007Jun 14, 2007Power Measurement Ltd.Power line sensor
US20070168161 *Jan 18, 2006Jul 19, 2007Vellore Jaichander KSystem and method for monitoring and configuring multiple devices in a power distribution network
US20070186010 *Feb 3, 2006Aug 9, 2007Rockwell Automation Technologies, Inc.Extending industrial control system communications capabilities
US20070214232 *Mar 7, 2006Sep 13, 2007Nokia CorporationSystem for Uniform Addressing of Home Resources Regardless of Remote Clients Network Location
US20070223533 *May 16, 2007Sep 27, 2007Abb Research LtdReception of redundant and non-redundant frames
US20070250831 *Sep 1, 2006Oct 25, 2007Bea Systems, Inc.Two-phase deployment framework
US20080080543 *Sep 27, 2007Apr 3, 2008Rockwell Automation Technologies, Inc.Network switch with controller i/o capability
US20080104189 *Oct 31, 2007May 1, 2008Schneider Automation Inc.Web Interface to a Device and an Electrical Network Control System
US20080154523 *Mar 13, 2008Jun 26, 2008Power Measurement Ltd.Intelligent Electronic Device Having Network Access
US20080221737 *Feb 4, 2008Sep 11, 2008Kurt JosephsonNetworked electrical interface
US20090089629 *Sep 27, 2007Apr 2, 2009Microsoft CorporationCapturing diagnostics in web browser applications
US20090228959 *Mar 4, 2008Sep 10, 2009Access Business Group International LlcSystem and markup language for information extraction from stand-alone devices in webspace
US20090265124 *Oct 22, 2009Electro Industries/Gauge TechIntelligent Electronic Device for Providing Broadband Internet Access
US20090320143 *Dec 24, 2009Microsoft CorporationSensor interface
US20110054814 *Jun 28, 2010Mar 3, 2011Electro Industries/Gauge TechPower meter having multiple ethernet ports
US20110231027 *Sep 22, 2011Amarante Technologies, Inc.Systems for monitoring power consumption
US20110270455 *Nov 3, 2011Abb Technology AgMethod for performing service/maintenance on a switchgear panel, and related switchgear panel
US20120254952 *Mar 28, 2012Oct 4, 2012Schneider Electric Energy GmbhInterface device for an intelligent electronic device and method of operating an interface device
USD648641Nov 15, 2011Lennox Industries Inc.Thin cover plate for an electronic system controller
USD648642Nov 15, 2011Lennox Industries Inc.Thin cover plate for an electronic system controller
CN102819507A *Mar 29, 2012Dec 12, 2012施耐德电气能源有限责任公司Interface device for an intelligent electronic device and method of operating an interface device
DE102004056089B3 *Nov 12, 2004Feb 2, 2006Universität StuttgartNetwork adapter for polling of information from automation device, uses embedded web-server for communication with client
DE102009027697A1 *Jul 15, 2009Jan 20, 2011Endress + Hauser Gmbh + Co. KgSystem zur Steuerung und/oder Überwachung einer Prozessanlage in der Automatisierungstechnik
EP1817830A4 *Nov 30, 2005Jan 20, 2016Abb Research LtdIntelligent configuration system for power distribution feeder reclosers and switches
EP2505966A1 *Mar 29, 2011Oct 3, 2012Schneider Electric Energy GmbHInterface device for an intelligent electronic device and method of operating an interface device
EP2975474A1 *Jul 17, 2014Jan 20, 2016Wago Verwaltungsgesellschaft mbHIndustrial control system and method for transferring data
WO2004049119A2 *Nov 21, 2003Jun 10, 2004Business Devices, Inc.Systems and methods for communicating with devices as web services
WO2004049119A3 *Nov 21, 2003Oct 21, 2004Business Devices IncSystems and methods for communicating with devices as web services
WO2005091958A3 *Mar 4, 2005Jun 15, 2006Bradford J ForthPower line sensors and systems incorporating same
WO2007124183A2 *Jan 4, 2007Nov 1, 2007Bea Systems, Inc.Two-phase deployment framework
WO2008109168A1 *Mar 10, 2008Sep 12, 2008Kurt JosephsonNetworked electrical interface
WO2011014928A1 *Aug 6, 2010Feb 10, 2011Rh Innovation Pty LtdOperator interface for automation systems
Classifications
U.S. Classification709/208
International ClassificationG05B19/05, H04L29/08, H04L12/24, H04L29/06
Cooperative ClassificationH04L69/12, H04L69/329, H04L69/169, H04L67/142, H04L69/161, H04L67/02, H04L69/08, H04L67/12, H04L67/025, H04L69/16, G05B2219/31156, G05B2219/31422, H04L41/082, G05B2219/32126, H04L41/0253, Y04S40/162, G05B2219/31104, G05B19/05, H04L29/06, H04L41/08, G05B2219/15038, G05B2219/31186, H04L41/0803, G05B2219/34038
European ClassificationH04L29/06J3, H04L29/06J19, H04L29/08N13B, H04L41/08A, H04L41/02G1, H04L29/06J, H04L29/08N1, H04L29/06, H04L29/08A7, G05B19/05, H04L29/08N1A, H04L29/08N11
Legal Events
DateCodeEventDescription
Jan 8, 2001ASAssignment
Owner name: SCHNEIDER AUTOMATION INC., MASSACHUSETTS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BAKER, RICHARD A.;ROLLAND, JEAN-MARC;REEL/FRAME:011448/0237
Effective date: 20001129