JPS55164187A - Fault discriminating system - Google Patents
Fault discriminating systemInfo
- 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
Links
Landscapes
- Accessory Devices And Overall Control Thereof (AREA)
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
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)
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 |
-
1979
- 1979-06-08 JP JP7269079A patent/JPS55164187A/en active Pending
Cited By (2)
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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