JPS54107242A - Backup system for digital-system controller - Google Patents
Backup system for digital-system controllerInfo
- Publication number
- JPS54107242A JPS54107242A JP1349378A JP1349378A JPS54107242A JP S54107242 A JPS54107242 A JP S54107242A JP 1349378 A JP1349378 A JP 1349378A JP 1349378 A JP1349378 A JP 1349378A JP S54107242 A JPS54107242 A JP S54107242A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- slc
- backup
- bus
- common bus
- 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)
Abstract
PURPOSE: To achieve a system reliability by a minimum backup unit even if the system scale is extended.
CONSTITUTION: Bus controller BSC stores a table, where a signal transmission side and a signal receiving side are determined, in a memory and transmits the table as code signals to a common bus in a prescribed order at a fixed period, thus performing signal transmission dependently upon common bus BUS. SLC (sub-loop contoller), SSM(sensor module) and high-level computers have their own addresses respectively and compare and collate the code signal transmitted to the common bus with their own addresses and discriminate that they are assigned as the transmission or receiving side currently, thereby performing the information transmission from the transmission-side device to the receiving-side device. In case that an arbitrary SLC is fauty, switching circuit COC is switched to the backup SLC side to keep the state before fault. Next, after the control output is made agree with th output before fault, and bumpless is caused to start backup control.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1349378A JPS54107242A (en) | 1978-02-10 | 1978-02-10 | Backup system for digital-system controller |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP1349378A JPS54107242A (en) | 1978-02-10 | 1978-02-10 | Backup system for digital-system controller |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS54107242A true JPS54107242A (en) | 1979-08-22 |
Family
ID=11834631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP1349378A Pending JPS54107242A (en) | 1978-02-10 | 1978-02-10 | Backup system for digital-system controller |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS54107242A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6148415A (en) * | 1993-06-11 | 2000-11-14 | Hitachi, Ltd. | Backup switching control system and method |
-
1978
- 1978-02-10 JP JP1349378A patent/JPS54107242A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6148415A (en) * | 1993-06-11 | 2000-11-14 | Hitachi, Ltd. | Backup switching control system and method |
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