System and method for providing communication between intelligent electronic devices via an open channel

• US 7,616,656 B2
• Filed: 10/20/2004
• Issued: 11/10/2009
• Est. Priority Date: 10/20/2004
• Status: Active Grant

• Current Assignee: EI Electronics LLC (Hubbell, Inc.)
• Original Assignee: Electron Industries / Gauge Tech
• Inventors: Slota, Fred, Wang, Wei
• Primary Examiner(s): Pham; Chi H
• Assistant Examiner(s): Faroul; Farah
• Application Number:
  US10/969,592
• Publication Number:
  US 20060083260A1
• Time in Patent Office: 1,847 Days
• Field of Search: 370/463, 370/466, 370/467, 700/295, 702/62
• US Class Current: 370/463
• CPC Class Codes: H04L 67/025 for remote control or remote monitoring of applications
• CPC Class Codes: H04L 67/12 specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
• CPC Class Codes: Y04S 40/18 Network protocols supporting networked applications, e.g. including control of end-device applications over a network

Abstract

An intelligent electronic device is configured to receive and generate data formatted in accordance with Distributed Network Protocol 3.0 (DNP 3.0) through an Ethernet TCP/IP medium. The intelligent electronic metering device for communicating over a network via an open channel includes an adapter to couple the electronic metering device to the network and to receive a message in a protocol of the network, wherein the adapter formats the message in a serial protocol; and a processor to receive the message from the adapter, generate a response to the message and transit the response to the adapter, wherein the adapter formats the response in the protocol of the network and transmits the response over the network via an open channel.

Claims

1. An intelligent electronic metering device for communicating over a network via an open channel, the device comprising:

an adapter to couple the electronic metering device to the network and to receive a message in a protocol of the network, the message including a request formatted in at least one metering communication protocol, wherein the adapter formats the request in a serial protocol of the electronic metering device by stripping a network protocol header and footer from the message in the protocol of the network and building a serial header and footer of the serial protocol around the request without changing the request, the protocol of the network being different than the serial protocol;

a serial channel coupling the adapter to a processor; and

the processor to receive the request from the adapter through the serial channel after the adapter formats the request in the serial protocol, generate a response to the request and transmit the response to the adapter via the serial protocol of the electronic metering device,

wherein the adapter formats the response in the protocol of the network by building a network protocol header and footer around the response without changing the response and transmits the response with the network protocol header and footer over the network via an open channel.

2. The device as in claim 1, wherein the request and response are in accordance with the Distributed Network Protocol 3.0 (DNP 3.0).

3. The device as in claim 1, wherein the adapter is an Ethernet card.

4. The device as in claim 1, wherein the protocol of the network is TCP/IP.

5. The device as in claim 4, wherein the adapter strips a TCP/IP header and footer from the received message and builds a serial header and footer around the request for transmission through the serial channel.

6. The device as in claim 5, wherein the processor parses the request from the serial header and footer and generates the response with the serial header and footer for transmission over the serial channel to the adapter.

7. The device as in claim 6, wherein the adapter strips the serial header and footer from the response and builds a TCP/IP header and footer around the response for transmission over the network.

8. The device as in claim 1, wherein the electronic metering device is operative to perform a function selected from a group consisting of voltage transformation, regulation and control, power-factor, and load balancing, monitoring, and protection of hardware and a combination thereof.

9. An intelligent electronic metering device for communicating over a network via an open channel, the electronic metering device comprising:

an adapter to couple the electronic metering device to an Ethernet network and to receive a message in TCP/IP protocol over the network, the message formatted in accordance with Distributed Network Protocol 3.0 (DNP 3.0), wherein the adapter strips a TCP/IP header and footer from the message without changing the message and formats the message with a serial header and footer in accordance with a protocol of the electronic metering device without changing the message, the TCP/IP protocol being different from the DNP 3.0;

a serial channel coupled to the adapter and to transmit the message to a processor; and

the processor to receive the message from the serial channel after the adapter formats the message with the serial header and footer, parse the message from the serial header and footer and generate a response with the serial header and footer for transmission over the serial channel to the adapter,

wherein the adapter strips the serial header and footer from the response and formats a TCP/IP header and footer around the response without changing the response for transmission over the network.

10. A method for providing communications between at least one intelligent electronic metering device and a base device over a network, the method comprising the steps:

transmitting a message from the base device, the message including data formatted with a header and footer of a network protocol of the network;

receiving the message at the at least one intelligent electronic metering device and stripping the network protocol header and footer from the message without changing the message and reformatting the message in a communication protocol of the at least one intelligent electronic metering device without changing the message wherein the reformatting the message in a communication protocol includes building a serial header and footer around the message, the network protocol being different than the communication protocol;

parsing a request from the message, the request formatted in at least one metering communication protocol;

generating a response to the request in the communication protocol of the at least one intelligent electronic metering device;

stripping the communication protocol of the at least one intelligent electronic metering device from the response and reformatting the response in the network protocol without changing the response; and

transmitting the response over he network.

11. The method as in claim 10, wherein the network is an Ethernet medium.

12. The method as in claim 11, wherein the network protocol is TCP/IP.

13. The method as in claim 12, wherein the request and response are in accordance with the Distributed Network Protocol 3.0 (DNP 3.0).

14. An electrical energy metering system for monitoring and controlling at least one intelligent electronic metering device over a network, the system comprising:

a base device coupled to the network that generates a message using a first communication protocol and transmits the message over the network in a second network protocol;

the at least one intelligent electronic metering device including an adapter to couple the device to the network and to receive the message using the second network protocol, wherein the adapter formats the message using a third communication protocol by stripping a header and footer of the second network protocol from the message and building a header and footer of the third communication protocol around the message without changing the message, wherein the third communication protocol is a serial protocol of the at least one intelligent electronic metering device and is different than the second network protocol;

a serial channel coupling the adapter to the processor for transmiting the message to the processor; and

a processor to receive the message from the adapter, generate a response to the message and transit the response to the adapter via the serial protocol of the at least one metering device,

wherein the adapter formats the response by building a header and footer of the second network protocol around the response without changing the response and transmits the response over the network via an open channel.

15. The system of claim 14, wherein the first protocol is Distributed Network Protocol 3.0 (DNP 3.0).

16. The system of claim 15, wherein the second network protocol is TCP/IP.

17. The system of claim 14, wherein the base device is selected from a group consisting of a remote terminal unit (RTU), a supervisory control and data acquisition (SCADA) master and a combination thereof.

18. The system of claim 17, wherein the network is an Ethernet medium.