Modular SCADA communication apparatus and system for using same

• US 7,006,524 B2
• Filed: 06/12/2002
• Issued: 02/28/2006
• Est. Priority Date: 06/12/2002
• Status: Expired due to Fees

• Current Assignee: Natis Communications Corp.
• Original Assignee: Natis Communications Corp.
• Inventors: Freeman, Mitchell B., Harris, Edee M.
• Primary Examiner(s): Chin, Wellington
• Assistant Examiner(s): JAIN, RAJ K
• Application Number:
  US10/170,977
• Publication Number:
  US 20040156352A1
• Time in Patent Office: 1,357 Days
• Field of Search: 370351-355, 370/465, 370/466, 455/445, 455/426.1, 455/552.1, 455/557, 700/9, 700/12
• US Class Current: 370/465
• CPC Class Codes: H04Q 9/00 Arrangements in telecontrol or telemetry systems for selectively calling a substation from a main station, in which substation desired apparatus is selected for applying a control signal thereto or for obtaining measured values therefrom

Abstract

A SCADA communication apparatus is made up of a set of modules, a first one of which is adapted for communication with a remote terminal unit (RTU), a second one of which is adapted for communication with a communications transceiver, and a third one of which is adapted for routing messages between and to physically house the first and second ones of the modules. Optionally, encryption and/or data compression can be provided by the operating system associated with the communication apparatus; or, these features may be provided in the form of application programs.

Claims

1. A modular SCADA communication apparatus adapted for relaying messages between an operations center and an equipment unit remote from the operations center, the communication apparatus comprising:

a device communication module configured to directly connect to the equipment unit and to optionally encrypt/decrypt information passed between the device communication module and the equipment unit under the control of a controller;

a transceiver communication module configured to communicate with the operations center via one or more designated communication networks using one or more associated transceivers so as to transfer data to and from the equipment unit and to optionally encrypt/decrypt said data, all under the control of the controller;

a programmable hub module adapted to physically house the device communication module and the transceiver communication module and operative, under control of an associated set of computer-readable instructions, to;

(a) act as a communications portal for routing and transcoding messages passing between the device communication module and the transceiver communication module, (b) act as the controller for instructing the device communication module and/or the transceiver communication module to encrypt their respective communications and to instruct the transceiver communication module as to which communication network to utilize in communicating with the operations center, and (c) provide primary and emergency power to the device communication module and the transceiver communication module.

2. The SCADA communications apparatus of claim 1 wherein the device communication module is configured to directly connect to a remote telemetry unit associated with a monitored equipment unit.

3. The SCADA communications apparatus of claim 2 wherein the device communications unit is configured to directly connect to the remote telemetry unit via one or more of a serial port, a universal serial bus port, a PCMCIA interface, an RJ 11 jack, an RJ 45 jack.

4. The SCADA communications apparatus of claim 1 wherein the programmable hub module is further operative, under control of the computer-readable instructions, to respond to polls by the operations center.

5. The SCADA communications apparatus of claim 1 wherein the programmable hub module is further operative, under control of the computer-readable instructions, to recognize codes in control messages received from the operations center, said control messages intended to cause the hub module to perform specific functions.

6. The SCADA communications apparatus of claim 1 wherein the programmable hub module is further operative, under control of the computer-readable instructions, to intercept messages from the device communication module and the transceiver communication module for processing at the hub module.

7. The SCADA communications apparatus of claim 1 wherein the programmable hub module is further operative, under control of the computer-readable instructions, to maintain information concerning ports on the transceiver communication module and device communication module which are enabled for use.

8. The SCADA communications apparatus of claim 1 wherein the programmable hub module is further operative, under control of the computer-readable instructions, to perform self-diagnostics and monitor equipment health of the transceiver communication module and device communication module.

9. The SCADA communications apparatus of claim 1 wherein the transceiver communication module is further configured to perform most-favored/least-favored routing of data sent between the equipment unit and the operations center via a primary (favored) connection or secondary (alternate) connection according to network circumstances.

10. The SCADA communication apparatus of claim 1 wherein the programmable hub module is further operative under the control of the computer-readable instructions to monitor messages to and from the operations center to determine whether any of the messages include instructions for the SCADA communication apparatus.

11. The SCADA communication apparatus of claim 1 wherein the transceiver communication module includes a transceiver having a PCMCIA form factor.

12. The SCADA communication apparatus of claim 1 wherein the transceiver communication module includes a modem adapted for use with a cellular communication network.

13. The SCADA communication apparatus of claim 10 wherein the instructions are selected from a list comprising compressing data, decompressing data, encrypting data, decrypting data, and updating operational parameters for the SCADA communication apparatus.

14. The SCADA communication apparatus of claim 1 wherein the transceiver communication module includes a modem adapted for use with one or more of the following:

an analog or digital leased line, a cellular telephone network, a cellular digital packet data service, a GSM packet radio system, a wireless communications system, a satellite communication system, or a TCP/IP communication system.