JPS5638645A - Digital output change-over system in duplex system - Google Patents
Digital output change-over system in duplex systemInfo
- Publication number
- JPS5638645A JPS5638645A JP11296279A JP11296279A JPS5638645A JP S5638645 A JPS5638645 A JP S5638645A JP 11296279 A JP11296279 A JP 11296279A JP 11296279 A JP11296279 A JP 11296279A JP S5638645 A JPS5638645 A JP S5638645A
- Authority
- JP
- Japan
- Prior art keywords
- output
- computer
- over
- switching
- main system
- 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
- Hardware Redundancy (AREA)
- Multi Processors (AREA)
Abstract
PURPOSE: To enable continuous change-over not causing chattering, by holding the output of main system at the digital output change-over from the main system to the waiting system and delaying the switching timing longer than the sampling period of computer.
CONSTITUTION: The computer 1, digital input unit 2, CPU3 and digital output unit 4 are respectively constituted with the duplex system A, B, the output of the failure output units 12A, 12B is input to the switching discrimination circuit 10 to control the switching unit 6 via the timer 20. In this case, if failed output is given to the computer of the main system, the output of the computer of the main system stored for a longer period than the sampling period of the computer at least, is outputted as it is, and after the period is elapsed, the switching to the output of waiting system can be made. Thus, the continuous change-over not causing chattering to the output can be made.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11296279A JPS5638645A (en) | 1979-09-05 | 1979-09-05 | Digital output change-over system in duplex system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11296279A JPS5638645A (en) | 1979-09-05 | 1979-09-05 | Digital output change-over system in duplex system |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5638645A true JPS5638645A (en) | 1981-04-13 |
Family
ID=14599888
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11296279A Pending JPS5638645A (en) | 1979-09-05 | 1979-09-05 | Digital output change-over system in duplex system |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5638645A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07107762A (en) * | 1994-06-15 | 1995-04-21 | Canon Inc | Apparatus provided with oscillatory-wave driving |
JP2021033600A (en) * | 2019-08-23 | 2021-03-01 | 三菱電機株式会社 | Digital output device |
-
1979
- 1979-09-05 JP JP11296279A patent/JPS5638645A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH07107762A (en) * | 1994-06-15 | 1995-04-21 | Canon Inc | Apparatus provided with oscillatory-wave driving |
JP2021033600A (en) * | 2019-08-23 | 2021-03-01 | 三菱電機株式会社 | Digital output device |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS55129847A (en) | Access system of memory unit | |
JPS5325324A (en) | Address selection system | |
JPS57195397A (en) | Locally doubled storage device | |
JPS5638645A (en) | Digital output change-over system in duplex system | |
JPS5614302A (en) | Process control system | |
JPS55129818A (en) | Error processing system in terminal unit | |
JPS5336439A (en) | Information processor | |
JPS5599655A (en) | Branch control unit | |
JPS55119724A (en) | Priority selection circuit | |
JPS5337A (en) | Control system for input/output unit | |
JPS5627429A (en) | Bus control system | |
JPS5438732A (en) | Input/output order accepting system | |
JPS5232645A (en) | Multiplexer | |
JPS5635067A (en) | Test system for input and output unit | |
JPS526040A (en) | Input output control system | |
JPS5380929A (en) | Memory unit | |
JPS5422074A (en) | Switching control system | |
JPS5616221A (en) | Control system for data transfer | |
JPS5346243A (en) | Processor control system | |
JPS54137940A (en) | Multi-data processor | |
JPS5419615A (en) | Control system for input and output unit | |
JPS5752902A (en) | Output collation system for digital controller | |
JPS57174725A (en) | Interruption controlling system | |
JPS5316540A (en) | Bus switching unit for electronic computer | |
JPS5638601A (en) | Multiplex control unit |