U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Distributing a real-time control program to a plurality of input/output nodes

Patent 5297257 Issued on March 22, 1994. Estimated Expiration Date: Icon_subject April 15, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Patent References

Combined mode supervisory program-panel controller method and apparatus for a process control system
Patent #: 4443861
Issued on: 04/17/1984
Inventor: Slater

Communications network for programmable controllers
Patent #: 4477882
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Distributed processing in a cluster of industrial controls linked by a communications network
Patent #: 4888726
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Inventor: Struger, et al.

Bit oriented communications network
Patent #: 4897834
Issued on: 01/30/1990
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Patent #: 4937777
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Inventors

Assignee

Application

No. 686054 filed on 04/15/1991

US Classes:

700/83Having operator control interface (e.g., control/display console)

Examiners

Primary: Shaw, Gareth D.
Assistant: Backenstose, Jonathan Hall

Attorney, Agent or Firm

International Class

G05B 019/05

Abstract

A method for a distributed processing system which includes the steps of developing a control program for controlling outputs at a plurality of I/O nodes, distributing executable portions of the program to the I/O nodes through a network, broadcasting input status data from the I/O nodes on the network and controlling the outputs at the I/O nodes in response to the input status data broadcast on the network and the executable portions of the program residing at the I/O nodes.

Other References

  • Morris, Henry M., "Distributed System Makes Wide Use of Bubble Memories", Control Engineering, Jan., 1982
  • Houser, Kirk D., "Data Highway Provides Database Management", Computer Design, Nov., 1983
  • "Integrated and Distributed Control--The Westinghouse Way", The Yankee Group, Boston, Mass., May 28, 1987
  • Tanaka, et al., "Intermediate Functional Language FCL for Improving Software Portability of Programmable Controllers", (exact date unknown)
  • Schuur, C., "Token-Passing Field Bus Controller", Philips Components, Apr., 198
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