JPS5640937A - Control system for common input/output unit - Google Patents
Control system for common input/output unitInfo
- Publication number
- JPS5640937A JPS5640937A JP11601379A JP11601379A JPS5640937A JP S5640937 A JPS5640937 A JP S5640937A JP 11601379 A JP11601379 A JP 11601379A JP 11601379 A JP11601379 A JP 11601379A JP S5640937 A JPS5640937 A JP S5640937A
- Authority
- JP
- Japan
- Prior art keywords
- unit
- central control
- control unit
- decided
- request
- 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
- Hardware Redundancy (AREA)
- Multi Processors (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
Abstract
PURPOSE: To avoid the conflict of operation for the shared input/output unit, by operating the designated central control unit during the designation of the manual control by the request of the central control unit if the unit is normal and then operating the unit by the request given by the central control unit decided as the master group if the designated central control unit is not normal respectively.
CONSTITUTION: During the designation of the automatic control, the master-group central control unit identifying unit 6 supplies the number of the central control unit decided as the master to the common unit/output unit switching unit 8. On the other hand, during the designation of the manual control, the designated central control unit deciding unit 7 supplies to the unit 8 the number of the designated central control unit in case the designated central control unit decides the possibility for generation of the operation request and the number of the central control unit decided as the master in case the incapability for generation of the operation request is decided respectively. Thus the internal switch is changed over. And only the request of operation given from the central control unit decided by the unit 6 or 7 among the central control units 1 and 2 is transmitted to the common input/ output unit.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54116013A JPS5842485B2 (en) | 1979-09-10 | 1979-09-10 | Common input/output device control method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54116013A JPS5842485B2 (en) | 1979-09-10 | 1979-09-10 | Common input/output device control method |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5640937A true JPS5640937A (en) | 1981-04-17 |
JPS5842485B2 JPS5842485B2 (en) | 1983-09-20 |
Family
ID=14676647
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54116013A Expired JPS5842485B2 (en) | 1979-09-10 | 1979-09-10 | Common input/output device control method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5842485B2 (en) |
-
1979
- 1979-09-10 JP JP54116013A patent/JPS5842485B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
JPS5842485B2 (en) | 1983-09-20 |
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