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US005568402A
United States Patent [19] [ii] Patent Number: 5,568,402
Gray et al. [45] Date of Patent: Oct. 22,1996
U.S. Patent Oct. 22,1996 sheet 2 of 4 5,568,402
[54] COMMUNICATION SERVER FOR
COMMUNICATING WITH A REMOTE
DEVICE
[75] Inventors: Dale A. Gray, Lutherville; Michael
Chmilewski, Taneytown; Edward A.
Bubnis, Jr., Catonsville; Michael G.
Burch, Baltimore; Charles W. Heaps,
Eldersburg, all of Md.; Robert M.
Galante, New Freedom, Pa.; Keith A.
Wancowicz, Perry Hall, Md.
[73] Assignee: GSE Process Solutions, Inc., Hunt Valley, Md.
[21] Appl. No.: 226,130
[22] Filed: Apr. 11, 1994
[51] Int. CI.6 H04B 1/00
[52] U.S. CI 364/514 C; 395/650
[58] Field of Search 364/514 C; 395/650,
395/909, 914, 740; 340/825.06, 825.08, 825.29; 370/95.2, 84
[56] References Cited
U.S. PATENT DOCUMENTS 4,642,760 2/1987 Yanai et al 395/740
4,680,753 7/1987 Fulton et al 370/85
4,829,298 5/1989 Fernandes 340/870
5,089,984 2/1992 Stnigeretal 395/650
5,117,175 5/1992 Pettigrew et al 323/256
5,179,701 1/1993 Chisholm 395/600
5,187,803 2/1993 Sohneretal 455/4.1
5,237,511 8/1993 Caird et al 364/483
5,349,580 9/1994 Hester et al 370/84
5,355,374 10/1994 Hester et al 370/84
Primary Examiner—Emanuel T. Voeltz
Assistant Examiner—Thomas Peeso
Attorney, Agent, or Firm—Lowe, Price, LeBlanc & Becker
[57] ABSTRACT
A method and apparatus for communication with a remote device 250 by a node system 200 and a SCADA system 100. The SCADA system 100 communicates with the remote device without protocals or characteristics of the remote device 250 or the communication channel 270 connecting the remote device to the node system. A display 250 may monitor the communication channel 270 and may be remotely located with respect to the node system 200. The node system 200 may schedule the input from the remote device 250 by setting an interval and duration so that the input may be transmitted.
5 Claims, 4 Drawing Sheets
