JPS57146302A - Automatic controller - Google Patents

Automatic controller

Info

Publication number
JPS57146302A
JPS57146302A JP56029890A JP2989081A JPS57146302A JP S57146302 A JPS57146302 A JP S57146302A JP 56029890 A JP56029890 A JP 56029890A JP 2989081 A JP2989081 A JP 2989081A JP S57146302 A JPS57146302 A JP S57146302A
Authority
JP
Japan
Prior art keywords
signal generator
deviation
outputs
output
generators
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
JP56029890A
Other languages
Japanese (ja)
Inventor
Masamichi Hasegawa
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 JP56029890A priority Critical patent/JPS57146302A/en
Publication of JPS57146302A publication Critical patent/JPS57146302A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric
    • G05B9/03—Safety arrangements electric with multiple-channel loop, i.e. redundant control systems

Abstract

PURPOSE:To specify and troubleshoot a failed signal generator if any one of signal generators is in failure, by comparing both of the outputs of the duplicated signal generators with each other and each output with a reference. CONSTITUTION:Signal generators 1 and 2 are located at the same location and no alarm is given at normal state, because the deviation between the both generators and each output and a reference value is within a specified value. When a switching circuit 3 selects the signal generator 1 and an operating device 5 is controlled with the output of the signal generator 1, if the signal generator 1 is in failure, since the deviation from the reference value is increased, a regulator 4 with a deviation alarm output outputs ''1'' to an AND circuit 7 and the switching circuit 3. Thus, the switching circuit 3 selects the signal generator 2. Since the deviation between the outputs of the signal generators is increased, a deviation detector 6 also outputs ''1''. As a result, normal control is continued and a signal generator in failure can be troubleshooted.
JP56029890A 1981-03-04 1981-03-04 Automatic controller Pending JPS57146302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56029890A JPS57146302A (en) 1981-03-04 1981-03-04 Automatic controller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56029890A JPS57146302A (en) 1981-03-04 1981-03-04 Automatic controller

Publications (1)

Publication Number Publication Date
JPS57146302A true JPS57146302A (en) 1982-09-09

Family

ID=12288556

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56029890A Pending JPS57146302A (en) 1981-03-04 1981-03-04 Automatic controller

Country Status (1)

Country Link
JP (1) JPS57146302A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61114303A (en) * 1984-11-07 1986-06-02 Mitsubishi Electric Corp Signal selector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61114303A (en) * 1984-11-07 1986-06-02 Mitsubishi Electric Corp Signal selector

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