CA2077893A1 - An equivalent network interface module for connecting a programmable logic controller to a high speed communications network - Google Patents

An equivalent network interface module for connecting a programmable logic controller to a high speed communications network

Info

Publication number
CA2077893A1
CA2077893A1 CA 2077893 CA2077893A CA2077893A1 CA 2077893 A1 CA2077893 A1 CA 2077893A1 CA 2077893 CA2077893 CA 2077893 CA 2077893 A CA2077893 A CA 2077893A CA 2077893 A1 CA2077893 A1 CA 2077893A1
Authority
CA
Canada
Prior art keywords
programmable logic
logic controller
network interface
interface module
high speed
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
CA 2077893
Other languages
French (fr)
Other versions
CA2077893C (en
Inventor
Joseph T. Bronikowski
Brian T. Hill
David J. Sackmann
Mark S. Weber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schneider Electric USA Inc
Original Assignee
Joseph T. Bronikowski
Brian T. Hill
David J. Sackmann
Mark S. Weber
Square D Company
Modicon, Inc.
Aeg Schneider Automation, Inc.
Schneider Automation Inc.
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 Joseph T. Bronikowski, Brian T. Hill, David J. Sackmann, Mark S. Weber, Square D Company, Modicon, Inc., Aeg Schneider Automation, Inc., Schneider Automation Inc. filed Critical Joseph T. Bronikowski
Publication of CA2077893A1 publication Critical patent/CA2077893A1/en
Application granted granted Critical
Publication of CA2077893C publication Critical patent/CA2077893C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • 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
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • G05B19/054—Input/output
    • 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
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • G05B19/052—Linking several PLC's
    • 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
    • G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
    • G05B19/058—Safety, monitoring
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
    • G06F13/10—Program control for peripheral devices
    • G06F13/12—Program control for peripheral devices using hardware independent of the central processor, e.g. channel or peripheral processor
    • G06F13/124—Program control for peripheral devices using hardware independent of the central processor, e.g. channel or peripheral processor where hardware is a sequential transfer control unit, e.g. microprocessor, peripheral processor or state-machine
    • G06F13/128—Program control for peripheral devices using hardware independent of the central processor, e.g. channel or peripheral processor where hardware is a sequential transfer control unit, e.g. microprocessor, peripheral processor or state-machine for dedicated transfers to a network

Abstract

A programmable logic controller (21) has an equivalent network interface module (35) for permitting direct communicative coupling of the programmable logic controller (21) to a data communication network (23), such as Ethernet. The equivalent network interface (35) contains a mailbox register (39) for holding messages and a communications processor (37) for controlling the operations of the equivalent network interface (35) while the remaining section of the programmable logic controller (21) contains a control processor (31) for regulating the operations of the controller (21), a scan processor (33) for scanning the controller's (21) ladder program and an image table (32) for holding data used by the scan processor (33).
CA002077893A 1990-03-22 1991-03-21 An equivalent network interface module for connecting a programmable logic controller to a high speed communications network Expired - Fee Related CA2077893C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US497,451 1990-03-22
US07/497,451 US5151978A (en) 1990-03-22 1990-03-22 Lan interface which permits a host computer to obtain data without interrupting a ladder program executing in the interface
PCT/US1991/001918 WO1991014988A1 (en) 1990-03-22 1991-03-21 An equivalent network interface module for connecting a programmable logic controller to a high speed communications network

Publications (2)

Publication Number Publication Date
CA2077893A1 true CA2077893A1 (en) 1991-09-23
CA2077893C CA2077893C (en) 2000-08-22

Family

ID=23976930

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002077893A Expired - Fee Related CA2077893C (en) 1990-03-22 1991-03-21 An equivalent network interface module for connecting a programmable logic controller to a high speed communications network

Country Status (8)

Country Link
US (1) US5151978A (en)
EP (1) EP0522005B1 (en)
JP (1) JP2524041B2 (en)
AU (1) AU645553B2 (en)
CA (1) CA2077893C (en)
DE (1) DE69130798T2 (en)
DK (1) DK0522005T3 (en)
WO (1) WO1991014988A1 (en)

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DE69130798T2 (en) 1999-06-10
EP0522005A4 (en) 1993-03-03
CA2077893C (en) 2000-08-22
DE69130798D1 (en) 1999-03-04
AU645553B2 (en) 1994-01-20
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JP2524041B2 (en) 1996-08-14
JPH05505896A (en) 1993-08-26

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