JPS5490938A - Fault detection system - Google Patents
Fault detection systemInfo
- Publication number
- JPS5490938A JPS5490938A JP15830877A JP15830877A JPS5490938A JP S5490938 A JPS5490938 A JP S5490938A JP 15830877 A JP15830877 A JP 15830877A JP 15830877 A JP15830877 A JP 15830877A JP S5490938 A JPS5490938 A JP S5490938A
- Authority
- JP
- Japan
- Prior art keywords
- unit
- signal
- control function
- failure
- failure detector
- 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
Links
Landscapes
- Detection And Prevention Of Errors In Transmission (AREA)
- Detection And Correction Of Errors (AREA)
Abstract
PURPOSE: To make unnecessary the delivery line of exclusive response signal, by checking the return signal including redundancy signal with the failure detector of the unit having control function and by detecting the interface failure of the units having and not having control function.
CONSTITUTION: The unit A having control function and the controlled unit B not having the control function are respectively provided with the redundancy signal generator and the failure detector. The unit A produces the redundancy signal S1 with the redundancy signal generator to the information transferred to the unit B and adds it to the unit B, the unit B checks the information including the redundancy signal S1 received with the failure detector, and logical operation is made between the output obtained from the failure detector and the signal S1 to the response signal S3. The result of operation is added to the signal S3 and is returned to the unit having control function, the return signal including redundancy signal is checked with the failure detector of the unit A, and the interface failure of the both units is detected. Thus, exclusive transmission path to deliver the result of failure detection from the unit B can be made unnecessary.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15830877A JPS5490938A (en) | 1977-12-27 | 1977-12-27 | Fault detection system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15830877A JPS5490938A (en) | 1977-12-27 | 1977-12-27 | Fault detection system |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5490938A true JPS5490938A (en) | 1979-07-19 |
JPS5725848B2 JPS5725848B2 (en) | 1982-06-01 |
Family
ID=15668783
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15830877A Granted JPS5490938A (en) | 1977-12-27 | 1977-12-27 | Fault detection system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5490938A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5135334A (en) * | 1974-09-20 | 1976-03-25 | Canon Kk | |
JPS53111255A (en) * | 1977-03-04 | 1978-09-28 | Hitachi Ltd | Check system for interface control signal |
JPS5422734A (en) * | 1977-07-22 | 1979-02-20 | Hitachi Ltd | Data transfer device |
-
1977
- 1977-12-27 JP JP15830877A patent/JPS5490938A/en active Granted
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5135334A (en) * | 1974-09-20 | 1976-03-25 | Canon Kk | |
JPS53111255A (en) * | 1977-03-04 | 1978-09-28 | Hitachi Ltd | Check system for interface control signal |
JPS5422734A (en) * | 1977-07-22 | 1979-02-20 | Hitachi Ltd | Data transfer device |
Also Published As
Publication number | Publication date |
---|---|
JPS5725848B2 (en) | 1982-06-01 |
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