JPS55164187A - Fault discriminating system - Google Patents

Fault discriminating system

Info

Publication number
JPS55164187A
JPS55164187A JP7269079A JP7269079A JPS55164187A JP S55164187 A JPS55164187 A JP S55164187A JP 7269079 A JP7269079 A JP 7269079A JP 7269079 A JP7269079 A JP 7269079A JP S55164187 A JPS55164187 A JP S55164187A
Authority
JP
Japan
Prior art keywords
logical value
fault
output
becomes
flop
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
JP7269079A
Other languages
Japanese (ja)
Inventor
Hiroshige Nakano
Shigenobu Katagiri
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.)
Koki Holdings Co Ltd
Original Assignee
Hitachi Koki Co 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 Hitachi Koki Co Ltd filed Critical Hitachi Koki Co Ltd
Priority to JP7269079A priority Critical patent/JPS55164187A/en
Publication of JPS55164187A publication Critical patent/JPS55164187A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To rapidly find out a position of a fault and curtail a time required for maintenance by rendering a drive voltage applied to a driven circuit into an unapplied state, and applying a detection voltage when the fault is detected in the entire circuit system.
CONSTITUTION: At the time of a normal state, when a driven circuit is represented by VD, the output voltage converted in TTL level by resistors 4 and 5 is of a logical value of 1. Therefore, when a check pulse is generated, the output of an NAND gate 9 is of the logical value as it is, and a flip-flop 10 holds a reset state. When faults such as breakage of conduction of a transistor 3, disconnection of a cable 2, disconnection of hammer coil 1 or the like occur, the output voltage is of a logical value of zero. An output of an invert or gate 80 becomes a logical value of 1. Upon this case, when a check pulse is generated, the output of the NAND gate 9 becomes a logical value of O, and the flip-flop 10 is set and a fault signal becomes a logical value of 1, whereby the occurrence of the fault may be detected.
COPYRIGHT: (C)1980,JPO&Japio
JP7269079A 1979-06-08 1979-06-08 Fault discriminating system Pending JPS55164187A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7269079A JPS55164187A (en) 1979-06-08 1979-06-08 Fault discriminating system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7269079A JPS55164187A (en) 1979-06-08 1979-06-08 Fault discriminating system

Publications (1)

Publication Number Publication Date
JPS55164187A true JPS55164187A (en) 1980-12-20

Family

ID=13496605

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7269079A Pending JPS55164187A (en) 1979-06-08 1979-06-08 Fault discriminating system

Country Status (1)

Country Link
JP (1) JPS55164187A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59109381A (en) * 1982-12-14 1984-06-25 Citizen Watch Co Ltd Detecting circuit of abnormalities of impact printer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59109381A (en) * 1982-12-14 1984-06-25 Citizen Watch Co Ltd Detecting circuit of abnormalities of impact printer
JPH0424236B2 (en) * 1982-12-14 1992-04-24 Citizen Watch Co Ltd

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