JPS54125377A - Fault detector for load circuit in sequence control - Google Patents

Fault detector for load circuit in sequence control

Info

Publication number
JPS54125377A
JPS54125377A JP3241078A JP3241078A JPS54125377A JP S54125377 A JPS54125377 A JP S54125377A JP 3241078 A JP3241078 A JP 3241078A JP 3241078 A JP3241078 A JP 3241078A JP S54125377 A JPS54125377 A JP S54125377A
Authority
JP
Japan
Prior art keywords
load circuit
load
exclusive
output
light
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
JP3241078A
Other languages
Japanese (ja)
Inventor
Kojiro Saito
Kimihiro Takase
Kazuhiko Hasegawa
Koji Nogami
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.)
Toyota Motor Corp
Yutaka Seimitsu Kogyo Ltd
Original Assignee
Toyota Motor Corp
Yutaka Seimitsu Kogyo 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 Toyota Motor Corp, Yutaka Seimitsu Kogyo Ltd filed Critical Toyota Motor Corp
Priority to JP3241078A priority Critical patent/JPS54125377A/en
Publication of JPS54125377A publication Critical patent/JPS54125377A/en
Pending legal-status Critical Current

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  • Testing And Monitoring For Control Systems (AREA)

Abstract

PURPOSE:To detect indicating a presence of disconnection, detachment of wiring, etc. in the load circuit, by operating a logical judgement for the output, from a current detector circuit for detecting a flow of current in the load circuit, and the output command. CONSTITUTION:With an output command of the sequencer applied to a terminal 1, a photothyristor 6 comes to be turned on. In case of the load circuit being in a normal state, AC current is fed to a load 10 from AC line 11 with the load 10 working. Simultaneously with the above, though a voltage across both ends of a Zener diode 8, 8' is applied to an exclusive ''or'' 19 through a photocoupler 16, a light emitting diode 21 does not emit a light because of both inputs to the exclusive ''or'' 19 being agreed. In case of a fault like disconnections in the load circuit, even for the output command to be applied to the terminal 1, no generation of voltage across the both ends of the Zener diode 8, 8' causes the exclusive ''or'' 19 to produce an output with the light emitting diode 21 made emitting a light.
JP3241078A 1978-03-23 1978-03-23 Fault detector for load circuit in sequence control Pending JPS54125377A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3241078A JPS54125377A (en) 1978-03-23 1978-03-23 Fault detector for load circuit in sequence control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3241078A JPS54125377A (en) 1978-03-23 1978-03-23 Fault detector for load circuit in sequence control

Publications (1)

Publication Number Publication Date
JPS54125377A true JPS54125377A (en) 1979-09-28

Family

ID=12358171

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3241078A Pending JPS54125377A (en) 1978-03-23 1978-03-23 Fault detector for load circuit in sequence control

Country Status (1)

Country Link
JP (1) JPS54125377A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56137204U (en) * 1980-02-29 1981-10-17
JPH01169610A (en) * 1987-12-25 1989-07-04 Sogo Keibi Hoshiyou Kk Method for confirming operation of control device
JPH01199213A (en) * 1988-02-03 1989-08-10 Daifuku Co Ltd Method for diagnosing trouble of output system of sequencer

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56137204U (en) * 1980-02-29 1981-10-17
JPH01169610A (en) * 1987-12-25 1989-07-04 Sogo Keibi Hoshiyou Kk Method for confirming operation of control device
JPH01199213A (en) * 1988-02-03 1989-08-10 Daifuku Co Ltd Method for diagnosing trouble of output system of sequencer

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