JPS55102060A - Unit selection system - Google Patents

Unit selection system

Info

Publication number
JPS55102060A
JPS55102060A JP16498278A JP16498278A JPS55102060A JP S55102060 A JPS55102060 A JP S55102060A JP 16498278 A JP16498278 A JP 16498278A JP 16498278 A JP16498278 A JP 16498278A JP S55102060 A JPS55102060 A JP S55102060A
Authority
JP
Japan
Prior art keywords
flag
unit
function
functions
judgement
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
Application number
JP16498278A
Other languages
Japanese (ja)
Inventor
Kyoji Kameo
Noritaka Nakano
Shinzo Tsurumaki
Takao Sagane
Masayuki Ito
Shizuki Yabe
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.)
Fujitsu Ltd
KDDI Corp
Original Assignee
Fujitsu Ltd
Kokusai Denshin Denwa KK
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 Fujitsu Ltd, Kokusai Denshin Denwa KK filed Critical Fujitsu Ltd
Priority to JP16498278A priority Critical patent/JPS55102060A/en
Publication of JPS55102060A publication Critical patent/JPS55102060A/en
Pending legal-status Critical Current

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Abstract

PURPOSE: To perform the selection of existing and spare unit having high reliability, by exchanging the M/P flag between the duplicated units having the self diagnosis function.
CONSTITUTION: The operating state of the respective main circuits 11, 11' of the self diagnosis functions 12, 12' is self-judged and the result is respectively inputted to the judgement functions 13, 13'. The functions 13, 13' exchange the M/P flag and monitor each other for the state of opposing unit. If a failure is taken place in the unit 10, the judgement function 13 changes the flag from M to P and the output gate 14 is controlled into open state. On the other hand, the judgement function 13' of the unit 10' changes the flag itself from P to M through the reception of the flag from the function 13 and the output gate is controlled into connecting state. Thus, the output signal of the main circuit 11' is delivered to perform selection between existing and spare unit.
COPYRIGHT: (C)1980,JPO&Japio
JP16498278A 1978-12-28 1978-12-28 Unit selection system Pending JPS55102060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16498278A JPS55102060A (en) 1978-12-28 1978-12-28 Unit selection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16498278A JPS55102060A (en) 1978-12-28 1978-12-28 Unit selection system

Publications (1)

Publication Number Publication Date
JPS55102060A true JPS55102060A (en) 1980-08-04

Family

ID=15803576

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16498278A Pending JPS55102060A (en) 1978-12-28 1978-12-28 Unit selection system

Country Status (1)

Country Link
JP (1) JPS55102060A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61192361U (en) * 1985-05-22 1986-11-29

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61192361U (en) * 1985-05-22 1986-11-29

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