JPS57169809A - Programmable logic controller - Google Patents

Programmable logic controller

Info

Publication number
JPS57169809A
JPS57169809A JP5536681A JP5536681A JPS57169809A JP S57169809 A JPS57169809 A JP S57169809A JP 5536681 A JP5536681 A JP 5536681A JP 5536681 A JP5536681 A JP 5536681A JP S57169809 A JPS57169809 A JP S57169809A
Authority
JP
Japan
Prior art keywords
instruction
input
process time
maximum process
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.)
Pending
Application number
JP5536681A
Other languages
Japanese (ja)
Inventor
Junichiro Fukuya
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 JP5536681A priority Critical patent/JPS57169809A/en
Publication of JPS57169809A publication Critical patent/JPS57169809A/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
    • G05B19/058—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
    • G05B2219/00—Program-control systems
    • G05B2219/10—Plc systems
    • G05B2219/14—Plc safety
    • G05B2219/14086—Watch dog

Landscapes

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

Abstract

PURPOSE:To display the result of operation, by providing a memory part to store the maximum process time value for each instruction of a series of user instruction groups that form a user program and reading and integrating the maximum process time of each instruction. CONSTITUTION:A programmable logic controller includes a user program memory 1 that stores a control program, an RAM3 that stores temporarily the input/ output data of an input/output circuit 2, a CPU4 that performs a logic arithmetic process for the input/output data based on the control program, a timing means 8, a keyboard 9, a display part 10 and furthermore a memory part 16 that defines and stores the maximum process time of each instruction for a series of user instruction groups that form a user program. The CPU4 performs an operation in which the maximum process time of each instruction is read and integrated. Then a display is carried out at the display part 10 to confirm whether the result of the above-mentioned operation is reduced less than the shortest connecting time value in the input mode of the controller.
JP5536681A 1981-04-13 1981-04-13 Programmable logic controller Pending JPS57169809A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5536681A JPS57169809A (en) 1981-04-13 1981-04-13 Programmable logic controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5536681A JPS57169809A (en) 1981-04-13 1981-04-13 Programmable logic controller

Publications (1)

Publication Number Publication Date
JPS57169809A true JPS57169809A (en) 1982-10-19

Family

ID=12996482

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5536681A Pending JPS57169809A (en) 1981-04-13 1981-04-13 Programmable logic controller

Country Status (1)

Country Link
JP (1) JPS57169809A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59100307U (en) * 1982-12-24 1984-07-06 和泉電気株式会社 programmable controller
EP0176655A2 (en) * 1984-10-03 1986-04-09 Hitachi, Ltd. Programmable controller
JPS6215606A (en) * 1985-07-15 1987-01-24 Fuji Electric Co Ltd Method for confirming executing speed of programmable controller

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54120378A (en) * 1978-03-09 1979-09-18 Toyoda Mach Works Ltd Sequence controller
JPS553049A (en) * 1978-06-20 1980-01-10 Omron Tateisi Electronics Co Sequence controller

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54120378A (en) * 1978-03-09 1979-09-18 Toyoda Mach Works Ltd Sequence controller
JPS553049A (en) * 1978-06-20 1980-01-10 Omron Tateisi Electronics Co Sequence controller

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59100307U (en) * 1982-12-24 1984-07-06 和泉電気株式会社 programmable controller
EP0176655A2 (en) * 1984-10-03 1986-04-09 Hitachi, Ltd. Programmable controller
JPS6215606A (en) * 1985-07-15 1987-01-24 Fuji Electric Co Ltd Method for confirming executing speed of programmable controller

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