JPS5644929A - Spare machine switching control system - Google Patents

Spare machine switching control system

Info

Publication number
JPS5644929A
JPS5644929A JP11939179A JP11939179A JPS5644929A JP S5644929 A JPS5644929 A JP S5644929A JP 11939179 A JP11939179 A JP 11939179A JP 11939179 A JP11939179 A JP 11939179A JP S5644929 A JPS5644929 A JP S5644929A
Authority
JP
Japan
Prior art keywords
current
control unit
signal
current machine
machine
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
Application number
JP11939179A
Other languages
Japanese (ja)
Other versions
JPS5929890B2 (en
Inventor
Tetsuo Kawamura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP54119391A priority Critical patent/JPS5929890B2/en
Publication of JPS5644929A publication Critical patent/JPS5644929A/en
Publication of JPS5929890B2 publication Critical patent/JPS5929890B2/en
Expired legal-status Critical Current

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  • Hardware Redundancy (AREA)
  • Computer And Data Communications (AREA)
  • Maintenance And Management Of Digital Transmission (AREA)

Abstract

PURPOSE: To make it possible to disconnect the channel interface of the current machine unconditionally, by providing a logic, which makes ineffective the channel interface disconnection inhibiting condition for spare machine switching, in the current machine.
CONSTITUTION: In the I/O control unit of the communication control unit and so on, the system is so constituted that current I/O control unit A may be switched to spare I/O control unit B when a fault occurs in current I/O control unit A. This current machine A is provided with a logic which generates the signal, which makes ineffective channel interface disconnection inhibiting conditions such as command execution signal 1 and interruption holding signal 2, by AND12 between current machine signal 11 and spare machine switching indication signal 10 and can disconnect current machine A by disconnection indication signal 6 from the system console or the current machine panel. As a result, the faulty current machine can be disconnected by indication from the console or the current panel.
COPYRIGHT: (C)1981,JPO&Japio
JP54119391A 1979-09-19 1979-09-19 Preliminary switching control method Expired JPS5929890B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP54119391A JPS5929890B2 (en) 1979-09-19 1979-09-19 Preliminary switching control method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP54119391A JPS5929890B2 (en) 1979-09-19 1979-09-19 Preliminary switching control method

Publications (2)

Publication Number Publication Date
JPS5644929A true JPS5644929A (en) 1981-04-24
JPS5929890B2 JPS5929890B2 (en) 1984-07-24

Family

ID=14760335

Family Applications (1)

Application Number Title Priority Date Filing Date
JP54119391A Expired JPS5929890B2 (en) 1979-09-19 1979-09-19 Preliminary switching control method

Country Status (1)

Country Link
JP (1) JPS5929890B2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5831440A (en) * 1981-08-19 1983-02-24 Fujitsu Ltd Automatic switching system for remote communication control processing device
JPH03226342A (en) * 1990-02-01 1991-10-07 Shinagawa Refract Co Ltd Exothermic type mold powder for continuous casting
JPH03226341A (en) * 1990-01-30 1991-10-07 Shinagawa Refract Co Ltd Exothermic type mold powder for continuous casting
JP2006214578A (en) * 2005-01-07 2006-08-17 Yamaha Motor Co Ltd Clutch operation auxiliary device and vehicle equipped with the same

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5831440A (en) * 1981-08-19 1983-02-24 Fujitsu Ltd Automatic switching system for remote communication control processing device
JPH03226341A (en) * 1990-01-30 1991-10-07 Shinagawa Refract Co Ltd Exothermic type mold powder for continuous casting
JPH0673728B2 (en) * 1990-01-30 1994-09-21 品川白煉瓦株式会社 Exothermic mold powder for continuous casting
JPH03226342A (en) * 1990-02-01 1991-10-07 Shinagawa Refract Co Ltd Exothermic type mold powder for continuous casting
JPH0673729B2 (en) * 1990-02-01 1994-09-21 品川白煉瓦株式会社 Exothermic mold powder for continuous casting
JP2006214578A (en) * 2005-01-07 2006-08-17 Yamaha Motor Co Ltd Clutch operation auxiliary device and vehicle equipped with the same

Also Published As

Publication number Publication date
JPS5929890B2 (en) 1984-07-24

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