KR960015126A - Monitoring device and method of programmable logic controller - Google Patents

Monitoring device and method of programmable logic controller Download PDF

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Publication number
KR960015126A
KR960015126A KR1019940027969A KR19940027969A KR960015126A KR 960015126 A KR960015126 A KR 960015126A KR 1019940027969 A KR1019940027969 A KR 1019940027969A KR 19940027969 A KR19940027969 A KR 19940027969A KR 960015126 A KR960015126 A KR 960015126A
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KR
South Korea
Prior art keywords
monitoring
buffer
data
programmable logic
monitoring device
Prior art date
Application number
KR1019940027969A
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Korean (ko)
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KR970005560B1 (en
Inventor
현태인
Original Assignee
이희종
엘지산전 주식회사
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Application filed by 이희종, 엘지산전 주식회사 filed Critical 이희종
Priority to KR1019940027969A priority Critical patent/KR970005560B1/en
Publication of KR960015126A publication Critical patent/KR960015126A/en
Application granted granted Critical
Publication of KR970005560B1 publication Critical patent/KR970005560B1/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
    • 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
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or 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
    • G05B2219/14006—Safety, monitoring in general

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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 프로그래머블 로직 콘트롤러의 모니터링 장치 및 방법에 관한 것으로, 종래에는 모니터링 버퍼에 등록되어 있는 내용을 모니터링 장치에서 일시에 취할 수 없고 두번의 통신프레임을 통해서 취해지기 때문에 두개의 통신하는 시점이 각각 틀림으로 인하여 한 시점을 놓고 볼때에는 오류가 있는 데이타가 결국 모니터링 장치로 전송됨으로써 변화가 잦은 접점에 대해서는 모니티링 정보가 부정확하게 되는 문제점이 있다. 따라서 본 발명은 모니터링 할 데이타가 많은 경우 두번에 걸쳐서 통신을 하여 취한 모니터링 데이타가 같은 프로그래머블 로직 콘트롤러(PLC) 스캔타임의 데이타임을 보증할 수 있도록 함으로써 정확한 모니터링 정보를 디스플레이할 수 있도록 한다.The present invention relates to a monitoring device and a method of a programmable logic controller. In the related art, two communication points of time are incorrect because the contents registered in the monitoring buffer cannot be taken at a time by the monitoring device but are taken through two communication frames. Due to this, there is a problem in that the monitoring information becomes inaccurate for the frequently changed contact point because the faulty data is eventually transmitted to the monitoring device. Therefore, the present invention enables to display accurate monitoring information by ensuring that the monitoring data obtained by communicating twice when there are a lot of data to be monitored is data of the same programmable logic controller (PLC) scan time.

Description

프로그래머블 로직 콘트롤러의 모니터링 장치 및 방법Monitoring device and method of programmable logic controller

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제5도는 본 발명 프로그래머블 로직 콘트롤러의 모니터링 장치 구성도,5 is a configuration diagram of a monitoring device of the programmable logic controller of the present invention;

제6도는 본 발명 프로그래머블 로직 콘트롤러의 모니터링 방법에 대한 동작흐름도.6 is a flowchart illustrating a method of monitoring the programmable logic controller of the present invention.

Claims (2)

프로그래머블 로직 콘트롤러(PLC)의 본체 내부에 접점에 대한 데이타를 저장하고 있는 데이타메모리와, 모니터링하기 위하여 상기 데이타메모리로 부터 실제 모니터링할 접점들을 두 영역으로 나누어 등록하여 두는 모니터링용 버퍼와, 모니터링시엔 록(LOCK)시켜 상기 모니터링용 버퍼로 부터 모니터링할 데이타를 모두 읽어들이고 그후엔 언록(UNLOCK)시켜서 상기 모니터링용 버퍼가 업데이트(UPDATE)가 가능하도록 하는 래치버퍼와, 상기 래치버퍼가 언록되기 전까지의 데이타를 차례로 읽어들여 디스플레이하여 사용자에게 보여주도록 하는 모니티링용 장치로 구성된 것을 특징으로 하는 프로그래머블 로직 콘트롤러의 모니터링 장치.A data buffer that stores data about contacts in the main body of a programmable logic controller (PLC), a monitoring buffer that registers the actual contacts to be monitored from the data memory into two areas for monitoring, and a lock when monitoring (LOCK) to read all the data to be monitored from the monitoring buffer and then unlock (UNLOCK) to enable the update buffer (UPDATE) and the buffer buffer until the latch buffer is unlocked A monitoring device of a programmable logic controller, comprising a monitoring device configured to read in sequence and display the same to a user. 모니터링 데이타를 모니터링용 버퍼에 두 영역으로 나누어 등록하는 제1단계와, 상기 제1단계에서 등록완료시 래치버퍼를 록(LOCK)시켜 두 영역에 등록된 데이타를 순차적으로 모두 읽어들인 후 언록(UNLOCK)시키는 제2단계와, 상기 제2단계에서 언록되기 전까지 모니터링용 버퍼(13)의 데이타를 읽어와 화면에 디스플레이하는 제3단계로 이루어진 것을 특징으로 하는 프로그래머블 로직 콘트롤러의 모니터링 방법.The first step of registering the monitoring data into two areas in the monitoring buffer and the latch buffer when the registration is completed in the first step, and sequentially reading all the data registered in the two areas, and then unlocking (UNLOCK). And a third step of reading data of the monitoring buffer (13) and displaying it on the screen until it is unlocked in the second step. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019940027969A 1994-10-28 1994-10-28 Method and apparatus of monitoring for plc KR970005560B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940027969A KR970005560B1 (en) 1994-10-28 1994-10-28 Method and apparatus of monitoring for plc

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940027969A KR970005560B1 (en) 1994-10-28 1994-10-28 Method and apparatus of monitoring for plc

Publications (2)

Publication Number Publication Date
KR960015126A true KR960015126A (en) 1996-05-22
KR970005560B1 KR970005560B1 (en) 1997-04-17

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KR1019940027969A KR970005560B1 (en) 1994-10-28 1994-10-28 Method and apparatus of monitoring for plc

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100925213B1 (en) 2002-06-07 2009-11-06 엘지전자 주식회사 High density multi layer optical disc and method for controlling a laser power
KR20030094855A (en) 2002-06-08 2003-12-18 엘지전자 주식회사 High density multi layer optical disc and method for managing a layer formatting
KR101317581B1 (en) * 2012-03-02 2013-10-11 엘에스산전 주식회사 Method for Tracking Error in Ladder Program of Programmable Logic Controller

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