JPS57124947A - Failure detection system - Google Patents

Failure detection system

Info

Publication number
JPS57124947A
JPS57124947A JP56009596A JP959681A JPS57124947A JP S57124947 A JPS57124947 A JP S57124947A JP 56009596 A JP56009596 A JP 56009596A JP 959681 A JP959681 A JP 959681A JP S57124947 A JPS57124947 A JP S57124947A
Authority
JP
Japan
Prior art keywords
signal
slave station
failure
station
call
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
JP56009596A
Other languages
Japanese (ja)
Other versions
JPS6347174B2 (en
Inventor
Kuniaki Matsuda
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 Denshi KK
Original Assignee
Hitachi Denshi 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 Hitachi Denshi KK filed Critical Hitachi Denshi KK
Priority to JP56009596A priority Critical patent/JPS57124947A/en
Publication of JPS57124947A publication Critical patent/JPS57124947A/en
Publication of JPS6347174B2 publication Critical patent/JPS6347174B2/ja
Granted legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/10—Monitoring; Testing of transmitters
    • H04B17/15—Performance testing
    • H04B17/19—Self-testing arrangements

Abstract

PURPOSE:To discriminate abnormity of a slave station and to trouble-shoot failure of the slave station earlier, by transmitting a call out signal at normal state of the slave station and end call signal at abnormal state of the slave station, and receiving the signals at a master station. CONSTITUTION:A call inhibiting signal, test signal and synchronizing signal are transmitted from a master station to all slave stations at test for a short time. On the other hand, when each slave station receives the three types of signals, a switching circuit 7 is controlled with a control circuit 3 after a time determined at the slave station to connect an input terminal 7b and an output terminal 7d, and if no failure is present in the said slave station, a control circuit 3 operates a callout signal generator 5 to transmit a callout signal to a master station for a short time. On the other hand, a failure such as battery liquid level down or the like takes place in the said slave station, since a failure signal from an alarm detection circuit 4 is applied to a control circuit 3, an end call signal generator 6 is operative and the end of call signal is transmitted to the master station. The master station discriminates a slave station transmitting an end of call signal as failure.
JP56009596A 1981-01-27 1981-01-27 Failure detection system Granted JPS57124947A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56009596A JPS57124947A (en) 1981-01-27 1981-01-27 Failure detection system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56009596A JPS57124947A (en) 1981-01-27 1981-01-27 Failure detection system

Publications (2)

Publication Number Publication Date
JPS57124947A true JPS57124947A (en) 1982-08-04
JPS6347174B2 JPS6347174B2 (en) 1988-09-20

Family

ID=11724699

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56009596A Granted JPS57124947A (en) 1981-01-27 1981-01-27 Failure detection system

Country Status (1)

Country Link
JP (1) JPS57124947A (en)

Also Published As

Publication number Publication date
JPS6347174B2 (en) 1988-09-20

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