JPS57134704A - Programmable logical controller - Google Patents

Programmable logical controller

Info

Publication number
JPS57134704A
JPS57134704A JP56019814A JP1981481A JPS57134704A JP S57134704 A JPS57134704 A JP S57134704A JP 56019814 A JP56019814 A JP 56019814A JP 1981481 A JP1981481 A JP 1981481A JP S57134704 A JPS57134704 A JP S57134704A
Authority
JP
Japan
Prior art keywords
output
status
flag
control means
user
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
JP56019814A
Other languages
Japanese (ja)
Other versions
JPS648841B2 (en
Inventor
Satoshi Yano
Tetsuo Doi
Yoshitane Saito
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.)
Omron Corp
Original Assignee
Tateisi Electronics Co
Omron Tateisi Electronics 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 Tateisi Electronics Co, Omron Tateisi Electronics Co filed Critical Tateisi Electronics Co
Priority to JP56019814A priority Critical patent/JPS57134704A/en
Publication of JPS57134704A publication Critical patent/JPS57134704A/en
Publication of JPS648841B2 publication Critical patent/JPS648841B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F9/00—Arrangements for program control, e.g. control units
    • G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
    • G06F9/46—Multiprogramming arrangements
    • G06F9/461—Saving or restoring of program or task context
    • G06F9/463—Program control block organisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Software Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Executing Machine-Instructions (AREA)
  • Safety Devices In Control Systems (AREA)
  • Programmable Controllers (AREA)

Abstract

PURPOSE:To execute an operation where the status of each output terminal is set to a specific content in accordance with the failure state, with a user's grogram with a minimum length, by providing a specific flag and an output status control means. CONSTITUTION:Every time when a user's program is executed, the content of an output buffer memory is renewed with the output data obtained from this execution and the content of the output buffer memory is transferred to an output interface circuit at each renewal. In such a programmable logical controller (PLC), a flag which can be operated by using a user's program and an output status control means which inhibits the transfer of the output data to the said output interface circuit from the said output buffer memory in accordance with the status of the flag are provided. For example, said flag is provided in a status storage section 5 and said output status control means is provided in a central processing device 1.
JP56019814A 1981-02-13 1981-02-13 Programmable logical controller Granted JPS57134704A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56019814A JPS57134704A (en) 1981-02-13 1981-02-13 Programmable logical controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56019814A JPS57134704A (en) 1981-02-13 1981-02-13 Programmable logical controller

Publications (2)

Publication Number Publication Date
JPS57134704A true JPS57134704A (en) 1982-08-20
JPS648841B2 JPS648841B2 (en) 1989-02-15

Family

ID=12009788

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56019814A Granted JPS57134704A (en) 1981-02-13 1981-02-13 Programmable logical controller

Country Status (1)

Country Link
JP (1) JPS57134704A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5947602A (en) * 1982-09-13 1984-03-17 Omron Tateisi Electronics Co Programmable controller
JPS62150434A (en) * 1985-12-24 1987-07-04 Nippon Denso Co Ltd Loop control type data processor

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5947602A (en) * 1982-09-13 1984-03-17 Omron Tateisi Electronics Co Programmable controller
JPH0375883B2 (en) * 1982-09-13 1991-12-03 Omron Tateisi Electronics Co
JPS62150434A (en) * 1985-12-24 1987-07-04 Nippon Denso Co Ltd Loop control type data processor
JPH0578856B2 (en) * 1985-12-24 1993-10-29 Nippon Denso Co

Also Published As

Publication number Publication date
JPS648841B2 (en) 1989-02-15

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