The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 09, 1998
Filed:
Apr. 03, 1996
Veronica Kertesz, Bristol, CT (US);
Don Whitehead, Rockfall, CT (US);
James Burke, Southington, CT (US);
Harshad Tanna, Plainville, CT (US);
Subhash Garg, Bristol, CT (US);
A Rajeshwar Rao, Hyderabad, IN;
S S Lakshmi, Hyderabad, IN;
S Mishra, Plainville, CT (US);
J Lakshminarayana, Plainville, CT (US);
Pradeep Kumar Tamanna, Hyderabad, IN;
B Ravi Kumar, Vizag, IN;
M Kailashnath, Sunnyvale, CA (US);
General Electric Company, New York, NY (US);
Abstract
A dynamic data exchange (DDE) server which allows external programs to access power management data is presented. The DDE server provides a mnemonic cross reference between register items and standardized, alphanumeric parameter names. This mnemonic interface allows the user to retrieve data from a device without knowledge of the actual device register item number. Also, the DDE server automatically performs time synchronizing for all supported devices and provides a consistent waveform and event interface. The DDE server is optimized for either the Modbus RTU or Ethernet protocol. The DDE server includes toolkit functions which are used to maintain DDE communication and protocol timers and to maintain active topic and item lists. The DDE server acts as a link between a client requesting device data and a field device which can provide the data. The DDE server communicates to the field device through communication ports and to the client via DDE message link. A client sends its requests to server to read/write some device registers. The server maps each request to suitable device read/write request packets and carries out the necessary transaction with device. Then it relays the result back to the client after processing and casting the collected device data to proper format.