JPS5569873A - Programmable logic controller - Google Patents

Programmable logic controller

Info

Publication number
JPS5569873A
JPS5569873A JP14313978A JP14313978A JPS5569873A JP S5569873 A JPS5569873 A JP S5569873A JP 14313978 A JP14313978 A JP 14313978A JP 14313978 A JP14313978 A JP 14313978A JP S5569873 A JPS5569873 A JP S5569873A
Authority
JP
Japan
Prior art keywords
execution
block
content
program
executed
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
JP14313978A
Other languages
Japanese (ja)
Inventor
Naoaki Iwasaki
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP14313978A priority Critical patent/JPS5569873A/en
Publication of JPS5569873A publication Critical patent/JPS5569873A/en
Pending legal-status Critical Current

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  • Programmable Controllers (AREA)

Abstract

PURPOSE: To obtain PLC which shortens execution time and also simplifythe formation of a program of sequence instructions, by providing respective sequence program blocks with flags controlling their execution and nonexecution.
CONSTITUTION: Execution start 1 is followed by execution 2 of sequence program block 21ϕ of block (ϕ). After execution 2, decision 3 on the content of a corresponding bit of control device table 22 equivalent to block 1 is made. When the content is "1", block 1 is executed 4 and when "0", a jamp is taken without execution. Next, decision 5 on the content of a corresponding bit of table 22 corresponding to block 2 is made. When it is "1", block 2 is executed 6 and when "0", a jump is made without execution. Similarly, advance to N is made while decisions on contents of respective blocks are made to decide on execution or nonexecution, and after end 7, return to the head of the program is made. Therefore, a needed block can be executed selectively at every time when sequence program blocks 211W 21N are scaned.
COPYRIGHT: (C)1980,JPO&Japio
JP14313978A 1978-11-20 1978-11-20 Programmable logic controller Pending JPS5569873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP14313978A JPS5569873A (en) 1978-11-20 1978-11-20 Programmable logic controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP14313978A JPS5569873A (en) 1978-11-20 1978-11-20 Programmable logic controller

Publications (1)

Publication Number Publication Date
JPS5569873A true JPS5569873A (en) 1980-05-26

Family

ID=15331829

Family Applications (1)

Application Number Title Priority Date Filing Date
JP14313978A Pending JPS5569873A (en) 1978-11-20 1978-11-20 Programmable logic controller

Country Status (1)

Country Link
JP (1) JPS5569873A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58119567A (en) * 1981-12-29 1983-07-16 株式会社日立製作所 Elevator controller
JPS58207106A (en) * 1982-03-30 1983-12-02 シンシナテイ・ミラクロン・インダストリ−ズ・インコ−ポレ−テッド Programmable control apparatus and method
JPS59114602A (en) * 1982-12-22 1984-07-02 Toshiba Corp Programmable controller
JPS59205605A (en) * 1983-05-07 1984-11-21 Hitachi Ltd Sequence control device
JPS6152702A (en) * 1984-08-23 1986-03-15 Nec Corp Sequence controller
WO1986002468A1 (en) * 1984-10-17 1986-04-24 Koyo Denshi Kogyo Kabushiki Kaisha Programmable controller
JPS61204704A (en) * 1985-03-06 1986-09-10 Toshiba Mach Co Ltd Computer system suitable for sequence control and servo-control
JPS62111303A (en) * 1985-11-11 1987-05-22 Mitsubishi Electric Corp Programmable controller control method
SG122930A1 (en) * 2004-11-30 2006-06-29 Air Prod & Chem Method and apparatus fot utilizing a sequence interpreter approach to control logic of a programmable logic controller

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58119567A (en) * 1981-12-29 1983-07-16 株式会社日立製作所 Elevator controller
JPS58207106A (en) * 1982-03-30 1983-12-02 シンシナテイ・ミラクロン・インダストリ−ズ・インコ−ポレ−テッド Programmable control apparatus and method
JPS59114602A (en) * 1982-12-22 1984-07-02 Toshiba Corp Programmable controller
JPS59205605A (en) * 1983-05-07 1984-11-21 Hitachi Ltd Sequence control device
JPS6152702A (en) * 1984-08-23 1986-03-15 Nec Corp Sequence controller
WO1986002468A1 (en) * 1984-10-17 1986-04-24 Koyo Denshi Kogyo Kabushiki Kaisha Programmable controller
JPS61204704A (en) * 1985-03-06 1986-09-10 Toshiba Mach Co Ltd Computer system suitable for sequence control and servo-control
JPS62111303A (en) * 1985-11-11 1987-05-22 Mitsubishi Electric Corp Programmable controller control method
SG122930A1 (en) * 2004-11-30 2006-06-29 Air Prod & Chem Method and apparatus fot utilizing a sequence interpreter approach to control logic of a programmable logic controller
US7272453B2 (en) 2004-11-30 2007-09-18 Air Products And Chemicals, Inc. Method and apparatus for utilizing a sequence interpreter approach to control logic of a programmable logic controller

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