Source: http://www.google.com/patents/US6047222?dq=6,260,087
Timestamp: 2017-07-21 15:40:10
Document Index: 517108623

Matched Legal Cases: ['art 3', 'art 1', 'art 2', 'art 1', 'art 2', 'art 1', 'art 2', 'art 1', 'art 2', 'art 3']

Patent US6047222 - Process control network with redundant field devices and buses - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsFunctional elements within a two-wire, loop-powered, two-way digital communications environment are interconnected using selective redundant connections and selective redundant functional elements. The redundant functional elements and redundant connections provide a smooth transition from operation...http://www.google.com/patents/US6047222?utm_source=gb-gplus-sharePatent US6047222 - Process control network with redundant field devices and busesAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS6047222 APublication typeGrantApplication numberUS 08/983,019PCT numberPCT/US1997/017983Publication dateApr 4, 2000Filing dateOct 3, 1997Priority dateOct 4, 1996Fee statusPaidPublication number08983019, 983019, PCT/1997/17983, PCT/US/1997/017983, PCT/US/1997/17983, PCT/US/97/017983, PCT/US/97/17983, PCT/US1997/017983, PCT/US1997/17983, PCT/US1997017983, PCT/US199717983, PCT/US97/017983, PCT/US97/17983, PCT/US97017983, PCT/US9717983, US 6047222 A, US 6047222A, US-A-6047222, US6047222 A, US6047222AInventorsHarry A. Burns, Brent H. Larson, Larry K. BrownOriginal AssigneeFisher Controls International, Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (42), Non-Patent Citations (32), Referenced by (259), Classifications (24), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetProcess control network with redundant field devices and buses
This is a continuation-in-part of U.S. patent application Ser. No. 08/726,266 filed Oct. 4, 1996, now abandoned.
The present invention relates generally to process control networks and, more specifically, to a process control network that implements process control functions in a distributed manner using redundant functional elements such as field devices and communication busses.
According to the present invention, functional elements within a process control system, such as a two-wire, loop-powered, two-way digital communications environment, are interconnected using selective redundant connections and selective redundant functional elements. The redundant functional elements and redundant connections provide a smooth transition from operation of a primary process loop element to a secondary process loop element in the event of a failure of the primary process loop element.
While the process control network having redundant field devices and busses of the present invention is described in detail as a process control network that implements process control functions in a decentralized or distributed manner using a set of Fieldbus devices, it should be noted that the process control network having redundant features of the present invention can be a process control network that performs distributed control functions using other types of field devices and communication protocols, including protocols that rely on other than two-wire buses and protocols that support analog and digital communications. Thus, for example, the process control network having redundant features of the present invention can be any process control network that performs distributed control functions even if this process control network uses the HART, PROFIBUS, etc. communication protocols or any other communication protocols that now exist or that may be developed in the future.
Thus, according to the timing schedule of FIG. 5, during any particular macrocycle of the segment 34b (FIG. 1), the AILOOP1 function block executes first for the time period specified by the box 70. Then, during the time period indicated by the vertical bar 72. the output of the AILOOP1 function block is published on the bus segment 34b in response to a compel data command from the LAS for the bus segment 34b. Likewise, the boxes 74, 76, 78, 80, and 81 indicate the execution times of the function blocks PIDLOOP1, AILOOP2, AOLOOP1, SSLOOP2. and PIDLOOP3, respectively (which are different for each of the different blocks), while the vertical bars 82, 84, 86, 88, and 89 indicate the times that the function blocks PIDLOOP1, AILOOP2, AOLOOP1, SSLOOP2, and PIDLOOP3, respectively, publish data on the bus segment 34b.
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KgMethod for updating device descriptions for field devices in process automation technology* Cited by examinerClassifications U.S. Classification700/79, 700/2, 700/83, 714/11, 709/201, 709/211, 700/3, 700/82, 714/2, 709/210, 714/6.32International ClassificationG05B19/04, G06F15/177, G05B19/418Cooperative ClassificationG05B19/41855, G05B2219/31245, G05B19/4184, G05B2219/31121, G05B2219/24175, G05B2219/24182, Y02P90/185, Y02P90/14European ClassificationG05B19/418F, G05B19/418N1Legal EventsDateCodeEventDescriptionMay 8, 1998ASAssignmentOwner name: FISHER CONTROLS INTERNATIONAL, INC., A CORP. OF DEFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:BURNS, HARRY A.;LARSON, BRENT H.;BROWN, LARRY K.;REEL/FRAME:009185/0606Effective date: 19971201Nov 25, 2002ASAssignmentOwner name: FISHER CONTROLS INTERNATIONAL LLC, MISSOURIFree format text: CHANGE OF NAME;ASSIGNOR:FISHER CONTROLS INTERNATIONAL, INC.;REEL/FRAME:013496/0150Effective date: 20020815Sep 29, 2003FPAYFee paymentYear of fee payment: 4Sep 14, 2007FPAYFee paymentYear of fee payment: 8Sep 19, 2011FPAYFee paymentYear of fee payment: 12RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services