JPS58134304A - Monitor device - Google Patents

Monitor device

Info

Publication number
JPS58134304A
JPS58134304A JP57017318A JP1731882A JPS58134304A JP S58134304 A JPS58134304 A JP S58134304A JP 57017318 A JP57017318 A JP 57017318A JP 1731882 A JP1731882 A JP 1731882A JP S58134304 A JPS58134304 A JP S58134304A
Authority
JP
Japan
Prior art keywords
pulse
ua
set
uc
fault
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
JP57017318A
Inventor
Takami Sakai
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP57017318A priority Critical patent/JPS58134304A/en
Publication of JPS58134304A publication Critical patent/JPS58134304A/en
Application status is Pending legal-status Critical

Links

Classifications

    • GPHYSICS
    • G05CONTROLLING; REGULATING
    • G05BCONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00Safety arrangements
    • G05B9/02Safety arrangements electric
    • G05B9/03Safety arrangements electric with multiple-channel loop, i.e. redundant control systems

Abstract

PURPOSE:To monitor a fault with high accuracy with a device that integrates plural pulse input signals, by deciding a fault when a signal which is not coincident with other signals is detected and that the detected signal has no change for a period longer than a prescribed time. CONSTITUTION:Input signals UA-UC are fed to one side of each of OR elements 12-14, and the outputs of these OR elements are supplied to AND elements 15-17 and an OR element 18 which form a 2-out-of-3 circuit. Discordance detecting circuits 20-22 deliver 1 when the pulses are not coincident with each other. Timers 35-40 deliver 1 when the pulse supplies 1 for a period longer than a prescribed time. The circuits 20 and 22 are set at an output 1 with the output of an AND25 and the timer 35 set at 1 respectively when pulses UB and UC are set at 0 with only the pulse UA kept at 1. Thus it is decided that the pulse UA is faulty. An approximately similar operation is carried out when the pulses UB and UC are set at 1 with only the pulse UA kept at 0. Then it is also decided that the pulse UA is faulty. In such a way, a fault of an input signal is detected with high accuracy.
JP57017318A 1982-02-05 1982-02-05 Monitor device Pending JPS58134304A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57017318A JPS58134304A (en) 1982-02-05 1982-02-05 Monitor device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57017318A JPS58134304A (en) 1982-02-05 1982-02-05 Monitor device

Publications (1)

Publication Number Publication Date
JPS58134304A true JPS58134304A (en) 1983-08-10

Family

ID=11940666

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57017318A Pending JPS58134304A (en) 1982-02-05 1982-02-05 Monitor device

Country Status (1)

Country Link
JP (1) JPS58134304A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6223397A (en) * 1985-07-19 1987-01-31 Fuji Electric Co Ltd Generator exciting system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5155643A (en) * 1974-11-11 1976-05-15 Omron Tateisi Electronics Co Denshikeisankiseigyohoshiki
JPS54112150A (en) * 1978-02-23 1979-09-01 Marantz Japan Inc Pulse interrupt detection circuit
JPS56110102A (en) * 1980-01-21 1981-09-01 Siemens Ag Method of and apparatus for selecting digital frequency

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5155643A (en) * 1974-11-11 1976-05-15 Omron Tateisi Electronics Co Denshikeisankiseigyohoshiki
JPS54112150A (en) * 1978-02-23 1979-09-01 Marantz Japan Inc Pulse interrupt detection circuit
JPS56110102A (en) * 1980-01-21 1981-09-01 Siemens Ag Method of and apparatus for selecting digital frequency

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6223397A (en) * 1985-07-19 1987-01-31 Fuji Electric Co Ltd Generator exciting system

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