CA2205021A1 - Method for sending messages from a lower-level controller to a higher-level controller - Google Patents

Method for sending messages from a lower-level controller to a higher-level controller

Info

Publication number
CA2205021A1
CA2205021A1 CA002205021A CA2205021A CA2205021A1 CA 2205021 A1 CA2205021 A1 CA 2205021A1 CA 002205021 A CA002205021 A CA 002205021A CA 2205021 A CA2205021 A CA 2205021A CA 2205021 A1 CA2205021 A1 CA 2205021A1
Authority
CA
Canada
Prior art keywords
level controller
message
sending messages
messages
acknowledgement
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
CA002205021A
Other languages
French (fr)
Other versions
CA2205021C (en
Inventor
Leopold Schwarz
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.)
Siemens AG
Original Assignee
Leopold Schwarz
Siemens Aktiengesellschaft
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 Leopold Schwarz, Siemens Aktiengesellschaft filed Critical Leopold Schwarz
Publication of CA2205021A1 publication Critical patent/CA2205021A1/en
Application granted granted Critical
Publication of CA2205021C publication Critical patent/CA2205021C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1803—Stop-and-wait protocols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/22—Arrangements for detecting or preventing errors in the information received using redundant apparatus to increase reliability

Abstract

An existing redundant physical path structure should be used for sending (fault) messages from a lower-level controller to a higher-level controller, without unnecessarily having to load the processing capacity of the higher-level controller by redundant messages in the process.
The invention achieves this aim in that a message is first of all transmitted via each transmission path, and a further message is always sent as soon as an acknowledgement of a previous message is received, the further message being sent via that transmission path via which the acknowledgement was received.
CA002205021A 1994-11-11 1995-11-06 Method for sending messages from a lower-level controller to a higher-level controller Expired - Fee Related CA2205021C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP94117878 1994-11-11
EP94117878.2 1994-11-11
PCT/EP1995/004369 WO1996015602A1 (en) 1994-11-11 1995-11-06 Process for transmitting messages from a secondary control system to a primary control system

Publications (2)

Publication Number Publication Date
CA2205021A1 true CA2205021A1 (en) 1996-05-23
CA2205021C CA2205021C (en) 2005-09-20

Family

ID=8216455

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002205021A Expired - Fee Related CA2205021C (en) 1994-11-11 1995-11-06 Method for sending messages from a lower-level controller to a higher-level controller

Country Status (6)

Country Link
EP (1) EP0791256B1 (en)
JP (1) JPH09511889A (en)
CN (1) CN1171872A (en)
CA (1) CA2205021C (en)
DE (1) DE59505009D1 (en)
WO (1) WO1996015602A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2344789A1 (en) * 2000-06-27 2001-12-27 Rockwell Electronic Commerce Corporation Redundant channels over a packet network

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1171543A (en) * 1980-01-24 1984-07-24 Billy R. Slater Industrial control system
US4472787A (en) * 1981-08-12 1984-09-18 Rockwell International Corporation System for transferring words on a bus with capability to intermix first attempts and retrys
US4607256A (en) * 1983-10-07 1986-08-19 Honeywell, Inc. Plant management system
US4646300A (en) * 1983-11-14 1987-02-24 Tandem Computers Incorporated Communications method
US4627045A (en) * 1984-02-14 1986-12-02 Rosemount Inc. Alternating communication channel switchover system

Also Published As

Publication number Publication date
EP0791256A1 (en) 1997-08-27
CA2205021C (en) 2005-09-20
WO1996015602A1 (en) 1996-05-23
DE59505009D1 (en) 1999-03-11
EP0791256B1 (en) 1999-01-27
JPH09511889A (en) 1997-11-25
CN1171872A (en) 1998-01-28

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Legal Events

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