JPS5760404A - Output unit of programmable logic controller - Google Patents

Output unit of programmable logic controller

Info

Publication number
JPS5760404A
JPS5760404A JP55135651A JP13565180A JPS5760404A JP S5760404 A JPS5760404 A JP S5760404A JP 55135651 A JP55135651 A JP 55135651A JP 13565180 A JP13565180 A JP 13565180A JP S5760404 A JPS5760404 A JP S5760404A
Authority
JP
Japan
Prior art keywords
circuit
output
output unit
outputting
signal
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
JP55135651A
Other languages
Japanese (ja)
Other versions
JPH027083B2 (en
Inventor
Toshitada Suzuki
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 JP55135651A priority Critical patent/JPS5760404A/en
Publication of JPS5760404A publication Critical patent/JPS5760404A/en
Publication of JPH027083B2 publication Critical patent/JPH027083B2/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
    • G05B2219/1181—Detection of I-O faults, shut down of I-O
    • 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
    • G05B2219/14136—Redundancy, masking redundancy, avoid failure but no fault detection

Landscapes

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

Abstract

PURPOSE:To elevate the reliability of an output unit, by providing plural outputting circuits in parallel at every output point, and also providing a switching circuit and a fault detecting circuit. CONSTITUTION:On a data processing circuit 1 of each output unit corresponding to (n) number of output points, a normal service outputting circuit and a stand- by outputting circuit, having the same constitution are provided, and are connected in parallel to corresponding data lines D0-Dn. Both the circuits 2, 3 are provided with FFs 4, 7 for responding to a strobe signal S and inputting a data, photocouplers PC5, 8 and driving transistors (TR)6, 9. AQ output of the FF4, and an output of the TR6 are inputted to a terminal A of a coincidence discriminating circuit 10, and a terminal B of the circuit 10 through a PC11 and an inverter 10, respectively. In case of coincidence of signals of the terminals A, B, the circuit 10 outputs an L signal, and incase of dissidence caused by a fault of the PC5 and the TR6, etc., the circuit 10 outputs an H signal, drives a relay 17 through an OR circuit 13 and an FF14, breaks X' of a contact and makes X, sends an output of the circuit 3 to the outside, and also turns on a light emission diode 18.
JP55135651A 1980-09-29 1980-09-29 Output unit of programmable logic controller Granted JPS5760404A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55135651A JPS5760404A (en) 1980-09-29 1980-09-29 Output unit of programmable logic controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55135651A JPS5760404A (en) 1980-09-29 1980-09-29 Output unit of programmable logic controller

Publications (2)

Publication Number Publication Date
JPS5760404A true JPS5760404A (en) 1982-04-12
JPH027083B2 JPH027083B2 (en) 1990-02-15

Family

ID=15156769

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55135651A Granted JPS5760404A (en) 1980-09-29 1980-09-29 Output unit of programmable logic controller

Country Status (1)

Country Link
JP (1) JPS5760404A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60501526A (en) * 1983-06-03 1985-09-12 ラ　テレメカニク　エレクトリク Programmable controller input/output device

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52121184A (en) * 1976-04-02 1977-10-12 Hitachi Ltd Electronic control equipment
JPS5430383A (en) * 1977-08-10 1979-03-06 Hitachi Ltd Back-up system of digital process controlling apparatus
JPS5595108A (en) * 1979-01-10 1980-07-19 Toyoda Mach Works Ltd Sequence controller equipped with substitute output terminal

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52121184A (en) * 1976-04-02 1977-10-12 Hitachi Ltd Electronic control equipment
JPS5430383A (en) * 1977-08-10 1979-03-06 Hitachi Ltd Back-up system of digital process controlling apparatus
JPS5595108A (en) * 1979-01-10 1980-07-19 Toyoda Mach Works Ltd Sequence controller equipped with substitute output terminal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60501526A (en) * 1983-06-03 1985-09-12 ラ　テレメカニク　エレクトリク Programmable controller input/output device

Also Published As

Publication number Publication date
JPH027083B2 (en) 1990-02-15

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