JPS5769308A - Scan-type programmable logic controller - Google Patents

Scan-type programmable logic controller

Info

Publication number
JPS5769308A
JPS5769308A JP14261380A JP14261380A JPS5769308A JP S5769308 A JPS5769308 A JP S5769308A JP 14261380 A JP14261380 A JP 14261380A JP 14261380 A JP14261380 A JP 14261380A JP S5769308 A JPS5769308 A JP S5769308A
Authority
JP
Japan
Prior art keywords
program
instruction
scan
address
process advance
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.)
Pending
Application number
JP14261380A
Other languages
Japanese (ja)
Inventor
Toshimi Matsuura
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 JP14261380A priority Critical patent/JPS5769308A/en
Publication of JPS5769308A publication Critical patent/JPS5769308A/en
Pending 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
    • G05B2219/00—Program-control systems
    • G05B2219/10—Plc systems
    • G05B2219/11—Plc I-O input output
    • G05B2219/1151—Fast scanning of I-O to put I-O status in image table

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Programmable Controllers (AREA)

Abstract

PURPOSE:To execute the process with a programmable logic controller, by carrying out in parallel both a program formed by a scan-type instruction and a program formed by a process advance instruction. CONSTITUTION:In a program memory 1, the program is set by a scan-type instruction for program addresses O to (m), by a process advance instruction for the next program addresses m+1 to (n) and by a scan-type instruction for the subsequent program addresses n+1 to Z respectively. When this program is executed, a CPU5 checks a prescribed register and jumps up to a process advance instruction of address m+1 which is designated by the register. Then if the unsatisfaction of process advance is detected through an execution of the process advance instruction, the program address of the relevant instruction is stored in an input/output memory 4 and at the same time a jump is given to the program address up to n+1. Thereafter, the program is executed from an address m+1 after the execution done up to the address Z.
JP14261380A 1980-10-13 1980-10-13 Scan-type programmable logic controller Pending JPS5769308A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14261380A JPS5769308A (en) 1980-10-13 1980-10-13 Scan-type programmable logic controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14261380A JPS5769308A (en) 1980-10-13 1980-10-13 Scan-type programmable logic controller

Publications (1)

Publication Number Publication Date
JPS5769308A true JPS5769308A (en) 1982-04-28

Family

ID=15319394

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14261380A Pending JPS5769308A (en) 1980-10-13 1980-10-13 Scan-type programmable logic controller

Country Status (1)

Country Link
JP (1) JPS5769308A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039203A (en) * 1983-08-12 1985-03-01 Idec Izumi Corp Programmable controller
JPS617903A (en) * 1984-06-22 1986-01-14 Hitachi Ltd Sequence control device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6039203A (en) * 1983-08-12 1985-03-01 Idec Izumi Corp Programmable controller
JPS617903A (en) * 1984-06-22 1986-01-14 Hitachi Ltd Sequence control device

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