WO1993020488A3 - Process control interface system having triply redundant remote field units - Google Patents

Process control interface system having triply redundant remote field units Download PDF

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Publication number
WO1993020488A3
WO1993020488A3 PCT/US1993/002253 US9302253W WO9320488A3 WO 1993020488 A3 WO1993020488 A3 WO 1993020488A3 US 9302253 W US9302253 W US 9302253W WO 9320488 A3 WO9320488 A3 WO 9320488A3
Authority
WO
WIPO (PCT)
Prior art keywords
redundant
process control
computer units
control interface
field
Prior art date
Application number
PCT/US1993/002253
Other languages
French (fr)
Other versions
WO1993020488A2 (en
Inventor
Robert S Glaser
Robert S Hoy
G Paul Fernandez
Timothy J Grai
Dean W Gaudreau
Robert J Hozeska
Donald J Grinwis
Gregory J Gavit
Joseph Sheehan Jr
Lowell V Thomas
Original Assignee
Dow Chemical Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dow Chemical Co filed Critical Dow Chemical Co
Priority to EP93908318A priority Critical patent/EP0631673B1/en
Priority to KR1019940703353A priority patent/KR100322462B1/en
Priority to JP5517460A priority patent/JPH07507889A/en
Priority to DE69322626T priority patent/DE69322626T2/en
Publication of WO1993020488A2 publication Critical patent/WO1993020488A2/en
Publication of WO1993020488A3 publication Critical patent/WO1993020488A3/en
Priority to HK98112492A priority patent/HK1011427A1/en

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Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
    • G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
    • G05B19/0423—Input/output
    • G05B19/0425—Safety, monitoring
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric
    • G05B9/03—Safety arrangements electric with multiple-channel loop, i.e. redundant control systems
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/10—Plc systems
    • G05B2219/14—Plc safety
    • G05B2219/14123—Majority voting, dynamic redundant, persistency and integrity
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/24—Pc safety
    • G05B2219/24184—Redundant I-O, software comparison of both channels
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/24—Pc safety
    • G05B2219/24187—Redundant processors run identical programs
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/24—Pc safety
    • G05B2219/24189—Redundant processors monitor same point, common parameters
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/24—Pc safety
    • G05B2219/24192—Configurable redundancy
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/20—Pc systems
    • G05B2219/25—Pc structure of the system
    • G05B2219/25428—Field device

Abstract

A process control interface system (10) having a network of distributed triply redundant input/output field computer units (12). The system includes a plurality of self-contained remotely located triply redundant field computer units (12) connected to decision making redundant process control computers (14) through a bi-directional communication network having at least two concurrently active communication channels (46, 48). Each of the field computer units include a set of at least three redundant field computers (92, 94, 96) for arbitrating both input and output signals. The field computer units also include individual abort circuits (510, 606) for each output signal to be transmitted to a device (84, 86) which affects the operation of the physical process. These abort circuits effectively enforce the output value signals arbitrated independently through each of the three redundant field computers using a voting procedure.
PCT/US1993/002253 1992-03-31 1993-03-15 Process control interface system having triply redundant remote field units WO1993020488A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP93908318A EP0631673B1 (en) 1992-03-31 1993-03-15 Process control interface system having triply redundant remote field units
KR1019940703353A KR100322462B1 (en) 1992-03-31 1993-03-15 A field computer unit having at least three redundant computers of one set, a process control system coupled to the field computer unit, and a method of controlling them
JP5517460A JPH07507889A (en) 1992-03-31 1993-03-15 Process control interface system with triple redundant remote field devices
DE69322626T DE69322626T2 (en) 1992-03-31 1993-03-15 INTERFACE FOR A PROCESS CONTROL SYSTEM WITH TRIPLE REDUNDANTED FIELD UNITS
HK98112492A HK1011427A1 (en) 1992-03-31 1998-11-30 Process control interface system having triply redundant remote field units

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/864,931 1992-03-31
US07/864,931 US5428769A (en) 1992-03-31 1992-03-31 Process control interface system having triply redundant remote field units

Publications (2)

Publication Number Publication Date
WO1993020488A2 WO1993020488A2 (en) 1993-10-14
WO1993020488A3 true WO1993020488A3 (en) 1994-03-31

Family

ID=25344354

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1993/002253 WO1993020488A2 (en) 1992-03-31 1993-03-15 Process control interface system having triply redundant remote field units

Country Status (12)

Country Link
US (4) US5428769A (en)
EP (4) EP1300735A2 (en)
JP (1) JPH07507889A (en)
KR (2) KR100322462B1 (en)
AU (1) AU3918393A (en)
CA (1) CA2131156A1 (en)
DE (2) DE69322626T2 (en)
ES (2) ES2128424T3 (en)
HK (2) HK1011427A1 (en)
MX (1) MX9301799A (en)
SG (1) SG55081A1 (en)
WO (1) WO1993020488A2 (en)

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