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JPS5775307A - Programmable logical controller - Google Patents

Programmable logical controller

Info

Publication number
JPS5775307A
JPS5775307A JP55150468A JP15046880A JPS5775307A JP S5775307 A JPS5775307 A JP S5775307A JP 55150468 A JP55150468 A JP 55150468A JP 15046880 A JP15046880 A JP 15046880A JP S5775307 A JPS5775307 A JP S5775307A
Authority
JP
Japan
Prior art keywords
module
connector
joint
main body
programmable logical
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.)
Granted
Application number
JP55150468A
Other languages
Japanese (ja)
Other versions
JPS6128124B2 (en
Inventor
Kenji Nishikido
Hideaki Nakamura
Kiyoto Hirase
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 JP55150468A priority Critical patent/JPS5775307A/en
Publication of JPS5775307A publication Critical patent/JPS5775307A/en
Publication of JPS6128124B2 publication Critical patent/JPS6128124B2/ja
Granted 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
    • G05B2219/11—Plc I-O input output
    • G05B2219/1188—Detection of inserted boards, inserting extra memory, availability of boards

Landscapes

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

Abstract

PURPOSE:To prevent the malfunction of a programmable logical controller, by providing an attachment/detachment detecting means to detect whether a memory module is attached to the controller main body or not. CONSTITUTION:An MNOS nonvolatile memory 8 in a memory module 2 connected to a connector 3 receives the supply of electric power from positive and negative power supply lines V+ and V- via joints J3 and J4 respectively. In addition, a 0-volt line V0 is connected to a joint J5 of the connector 3, and the joint J5 is connected to the joint J1 at the side of the module 2. When the connection is correct between the module 2 and the connector 3, the potential is set at 0 volt for the joint J1 of the PLC main body 1. If the module 2 is out of the connector 3, the signal EC is pulled up to the line V+ through a resistance R to be set at the high level ''1''. In other words, whether the module 2 is attached to the controller main body or not is detected by the potential of the signal EC.
JP55150468A 1980-10-27 1980-10-27 Programmable logical controller Granted JPS5775307A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55150468A JPS5775307A (en) 1980-10-27 1980-10-27 Programmable logical controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55150468A JPS5775307A (en) 1980-10-27 1980-10-27 Programmable logical controller

Publications (2)

Publication Number Publication Date
JPS5775307A true JPS5775307A (en) 1982-05-11
JPS6128124B2 JPS6128124B2 (en) 1986-06-28

Family

ID=15497568

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55150468A Granted JPS5775307A (en) 1980-10-27 1980-10-27 Programmable logical controller

Country Status (1)

Country Link
JP (1) JPS5775307A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01149107A (en) * 1987-12-07 1989-06-12 Fanuc Ltd Numerical controller
EP0326244A2 (en) * 1988-01-21 1989-08-02 Honeywell Inc. Protection means for microcomputer control system
JPH01194001A (en) * 1988-01-29 1989-08-04 Fanuc Ltd Control transfer device for contents of memory at time of repair
JPH0230502U (en) * 1988-08-22 1990-02-27

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01149107A (en) * 1987-12-07 1989-06-12 Fanuc Ltd Numerical controller
EP0326244A2 (en) * 1988-01-21 1989-08-02 Honeywell Inc. Protection means for microcomputer control system
JPH01194001A (en) * 1988-01-29 1989-08-04 Fanuc Ltd Control transfer device for contents of memory at time of repair
JPH0230502U (en) * 1988-08-22 1990-02-27

Also Published As

Publication number Publication date
JPS6128124B2 (en) 1986-06-28

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