KR950009386A - How to reduce scan time of PLC - Google Patents

How to reduce scan time of PLC Download PDF

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Publication number
KR950009386A
KR950009386A KR1019930019491A KR930019491A KR950009386A KR 950009386 A KR950009386 A KR 950009386A KR 1019930019491 A KR1019930019491 A KR 1019930019491A KR 930019491 A KR930019491 A KR 930019491A KR 950009386 A KR950009386 A KR 950009386A
Authority
KR
South Korea
Prior art keywords
plc
command
stored
fetch
dedicated lsi
Prior art date
Application number
KR1019930019491A
Other languages
Korean (ko)
Other versions
KR0161830B1 (en
Inventor
양오
Original Assignee
김희수
금성기전 주식회사
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.)
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Publication date
Application filed by 김희수, 금성기전 주식회사 filed Critical 김희수
Priority to KR1019930019491A priority Critical patent/KR0161830B1/en
Publication of KR950009386A publication Critical patent/KR950009386A/en
Application granted granted Critical
Publication of KR0161830B1 publication Critical patent/KR0161830B1/en

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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
    • 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
    • G05B2219/1132—High speed bus between plc and plc or programming device
    • 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
    • G05B2219/1147—Variable rate of scan

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

Abstract

본 발명은 PLC의 스캔 타임 단축방법에 관한 것으로 PLC의 스캔타임 단축을 위해 PLC스캔장치의 전동LSI내부에 코드래치부, 웅용명령 판독부 폐치 저장부를 추가로 구비하여 PLC의 고속주행 하드웨어 처리명령과 CPU처리용 소프트 웨어 명령이 섞여 있는 경우, 전용 LSI가 처리할 수 없는 소프트 웨어 명령이었을 경우 프로그램카운터를 +1증가시켜 이 데이터를 페치 저장부에 저장하고, 하나의 응용명령이 전부 페치저장부의 램에 저장되었을 경우 전용LSI가 CPU에 소프트 웨어 명령처리를 요청하고 CPU가 페치-저장부를 읽어 명령을 처리하고 전용 LSI에 다음녕령을 처리하게 함으로써 PLC의 스캔타임을 단축시킨다.The present invention relates to a method for shortening the scan time of a PLC. In order to shorten the scan time of a PLC, a code latch unit and a grand command reading unit closing storage unit are additionally included in the motorized LSI of the PLC scan device. If the software instruction for CPU processing is mixed, if the software instruction cannot be handled by the dedicated LSI, the program counter is increased by +1 to store this data in the fetch storage, and all of the application instructions are stored in the fetch storage. If it is stored in the PC, the dedicated LSI requests the CPU to process the software command, and the CPU reads the fetch-store to process the command and the next LJ to process the next command.

Description

피엘시(PLC)의 스캔타임 단축방법How to reduce scan time of PLC

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 본 발명의 PLC의 데이타 스캔장치 회로블럭도.1 is a circuit block diagram of a data scanning device of a PLC of the present invention.

Claims (1)

사용자 프로그램을 프로그램 메로리(2)에 저장하고, 전용 LSI(9)에 런(RUN)을 지령하는 단계, 전용LSI(9)가 수행할 수 있는 명령이면 프로그램 카운터(3)가 지시하는 번지의 프로그램 메로리(2)의 데이터를 읽어 고속연산하여 데이타 메모리(10)에 기록하는 단계, 상기 전용LSI(9)가 수행할 수 없는 명령이면 프로그램 카운터(3)에 1을 더하고 코르래치부(6)의 데이터와 응용명명을 비교하여 응용명령 오퍼랜드를결정하는 단계, 응용명령이 전부 페치저장부(8)에 저장되었으면, 페치저장부(8)을 읽어 소프트 웨어를 처리하고 전용 LSI(9)에 런(RUN)을 지령하는 단계, 응용명령이 전부 페치저장부(8)에 저장되지 않았으면 소프트 웨어를 페치저장부(8)에 저장하는 단계로 이루어짐을 특징으로하는 PLC의 스캔 타임 단축방법.Store the user program in the program memory (2), and command RUN to the dedicated LSI (9). If the instruction can be executed by the dedicated LSI (9), the program at the address indicated by the program counter (3) Read the data of the memory 2 and write it to the data memory 10 by high-speed operation. If the dedicated LSI 9 is an instruction that cannot be executed, 1 is added to the program counter 3, and Determining the application instruction operand by comparing the data with the application name, if all the application instructions have been stored in the fetch storage section 8, the fetch storage section 8 is read to process the software and run in a dedicated LSI (9). RUN) command, and if the application instruction is not stored in the fetch storage unit (8), the software is stored in the fetch storage unit (8). ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019930019491A 1993-09-23 1993-09-23 The scan time reducing method for plc KR0161830B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019930019491A KR0161830B1 (en) 1993-09-23 1993-09-23 The scan time reducing method for plc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019930019491A KR0161830B1 (en) 1993-09-23 1993-09-23 The scan time reducing method for plc

Publications (2)

Publication Number Publication Date
KR950009386A true KR950009386A (en) 1995-04-21
KR0161830B1 KR0161830B1 (en) 1999-03-20

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ID=19364414

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019930019491A KR0161830B1 (en) 1993-09-23 1993-09-23 The scan time reducing method for plc

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KR (1) KR0161830B1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100972509B1 (en) * 2003-03-19 2010-07-28 엘에스산전 주식회사 Method for controlling scan program of programmable logic controller
CN108227608B (en) * 2016-12-15 2020-11-06 台达电子工业股份有限公司 Dynamic scanning method and system based on PLC control

Also Published As

Publication number Publication date
KR0161830B1 (en) 1999-03-20

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