JPS6488169A - Diagnosing device for majority deciding circuit - Google Patents
Diagnosing device for majority deciding circuitInfo
- Publication number
- JPS6488169A JPS6488169A JP62243749A JP24374987A JPS6488169A JP S6488169 A JPS6488169 A JP S6488169A JP 62243749 A JP62243749 A JP 62243749A JP 24374987 A JP24374987 A JP 24374987A JP S6488169 A JPS6488169 A JP S6488169A
- Authority
- JP
- Japan
- Prior art keywords
- signals
- circuit
- deciding circuit
- test signal
- majority deciding
- 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
- Tests Of Electronic Circuits (AREA)
- Safety Devices In Control Systems (AREA)
- Logic Circuits (AREA)
Abstract
PURPOSE:To evaluate the soundness of the majority deciding circuit by applying a test signal of an opening/closing circuit which constitute the majority deciding circuit and detecting a current for every element constituting OR. CONSTITUTION:Signal processors 1 and 2 input and process signals outputted by redundant sensors A1-N1 and A2-N2 and output trip signals when the signals exceed a prescribed value. The trip signals of the processors 1 and 2 are supplied as signals (a) and (b) to opening/closing means 12 and 13 which constitute the majority deciding circuit through changeover switches 3 and 4. A test signal is supplied to the contact of one of the switches 3 and 4 from the diagnosing device 11 and the signals (a) and (b) are switched to the test signal with switching commands 7 and 8. Then the outputs of current detecting means 14 and 15 in response to the test signal are inputted as signals 9 and 10 to the circuit 11 to diagnose its abnormality. Consequently, a fault of each opening/closing means is decided to evaluate the soundness of the majority deciding circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62243749A JPS6488169A (en) | 1987-09-30 | 1987-09-30 | Diagnosing device for majority deciding circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP62243749A JPS6488169A (en) | 1987-09-30 | 1987-09-30 | Diagnosing device for majority deciding circuit |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6488169A true JPS6488169A (en) | 1989-04-03 |
Family
ID=17108411
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP62243749A Pending JPS6488169A (en) | 1987-09-30 | 1987-09-30 | Diagnosing device for majority deciding circuit |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6488169A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019056307A (en) * | 2017-09-19 | 2019-04-11 | 株式会社東芝 | Turbine protection device and diagnostic method for turbine protection device |
-
1987
- 1987-09-30 JP JP62243749A patent/JPS6488169A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2019056307A (en) * | 2017-09-19 | 2019-04-11 | 株式会社東芝 | Turbine protection device and diagnostic method for turbine protection device |
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