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Industrial control system

DC
  • US 4,908,746 A
  • Filed: 10/15/1986
  • Issued: 03/13/1990
  • Est. Priority Date: 10/15/1986
  • Status: Expired due to Term
First Claim
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1. A control system for controlling and monitoring electronically controlled equipment comprising:

  • control means including a plurality of programs each having associated local storage memory, each of said programs operable to be executed independently of other of said programs to produce output data;

    a database memory comprising a plurality of memory elements for storing said output data; and

    database managing means operable to transfer data stored in one of said memory elements to one of said programs only if the data stored in said memory element has changed since a previous transfer to the local memory of said program of the data stored in said element.

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