JPS5528109A - Failure detector for plant condition detector - Google Patents

Failure detector for plant condition detector

Info

Publication number
JPS5528109A
JPS5528109A JP9907678A JP9907678A JPS5528109A JP S5528109 A JPS5528109 A JP S5528109A JP 9907678 A JP9907678 A JP 9907678A JP 9907678 A JP9907678 A JP 9907678A JP S5528109 A JPS5528109 A JP S5528109A
Authority
JP
Japan
Prior art keywords
detectors
failure
normal
signal
detector
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
JP9907678A
Other languages
Japanese (ja)
Inventor
Kanta Suzuki
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 JP9907678A priority Critical patent/JPS5528109A/en
Publication of JPS5528109A publication Critical patent/JPS5528109A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To increase the reliability of the detection signal offered to the system side, by supplying the normal detection signal from other normal detectors to the control system with alarming immediately, when either one of a plurality of detectors detecting the same conditions is in failure. CONSTITUTION:The pressure being one of the plant condition amount is detected at the detectors 1 and 2, the detection signals A and B are fed to the high value selectors 5 and 6 via the selector switches 3 and 4, and the high value is selected and it is fed to the adder 7. The adder 7 operates the signal in the gain of 1/2 and feeds normal signal to the control system. Further, the signal from the adder 7 and the detection signals A and B and are received at the subtractors 8 and 9 to perform subtraction and the result is fed to the comparators 10 and 11. When the detectors 1 and 2 are normal, the comparators 10 and 11 are not operated. if either one of the detectors is in failure, the comparator 10 or 11 is operated to perform alarm display with the operation of X or Y which is the ANN contact. The detector having a failure can be repaired in ON-line system.
JP9907678A 1978-08-16 1978-08-16 Failure detector for plant condition detector Pending JPS5528109A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9907678A JPS5528109A (en) 1978-08-16 1978-08-16 Failure detector for plant condition detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9907678A JPS5528109A (en) 1978-08-16 1978-08-16 Failure detector for plant condition detector

Publications (1)

Publication Number Publication Date
JPS5528109A true JPS5528109A (en) 1980-02-28

Family

ID=14237819

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9907678A Pending JPS5528109A (en) 1978-08-16 1978-08-16 Failure detector for plant condition detector

Country Status (1)

Country Link
JP (1) JPS5528109A (en)

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