JPS5710803A - False signal transmission preventing circuit - Google Patents

False signal transmission preventing circuit

Info

Publication number
JPS5710803A
JPS5710803A JP8456480A JP8456480A JPS5710803A JP S5710803 A JPS5710803 A JP S5710803A JP 8456480 A JP8456480 A JP 8456480A JP 8456480 A JP8456480 A JP 8456480A JP S5710803 A JPS5710803 A JP S5710803A
Authority
JP
Japan
Prior art keywords
output
relay
channels
signal
false signal
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
JP8456480A
Other languages
Japanese (ja)
Inventor
Kanetaka Kanda
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.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Atomic Power Industries Inc
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 Mitsubishi Atomic Power Industries Inc filed Critical Mitsubishi Atomic Power Industries Inc
Priority to JP8456480A priority Critical patent/JPS5710803A/en
Publication of JPS5710803A publication Critical patent/JPS5710803A/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

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Safety Devices In Control Systems (AREA)

Abstract

PURPOSE:To prevent a malfunction which is caused by a false signal, by providing a final output consisting of an OR output of a relay, to which an output of plural channels is provided in parallel with a relay rack to which the same output is provided, and an AND output of a final stage output of the relay rack. CONSTITUTION:A safety protection system signal transmitting circuit 10 is equipped with, for instance, 4 channels, and outputs a protection signal when inputs of 2 channels among them have coincided. An analog signal of a process quantity detector 11 is provided to a bystable multivibrator 12, and when it has exceeded a set point, a logical value 1 is outputted. An output of the bistable multivibrator 12 is provided to a relay rack 14, and when 2 channels become the logical value 1, a relay 16 is operated. The output of the bistable multivibrator 12 is simultaneously provided to a block relay 21 of a false signal transmission preventing circuit 20, an OR output of said outputs is provided to an AND circuir 23 together with an output of the relay 16, and its output is made a protection signal.
JP8456480A 1980-06-24 1980-06-24 False signal transmission preventing circuit Pending JPS5710803A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8456480A JPS5710803A (en) 1980-06-24 1980-06-24 False signal transmission preventing circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8456480A JPS5710803A (en) 1980-06-24 1980-06-24 False signal transmission preventing circuit

Publications (1)

Publication Number Publication Date
JPS5710803A true JPS5710803A (en) 1982-01-20

Family

ID=13834142

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8456480A Pending JPS5710803A (en) 1980-06-24 1980-06-24 False signal transmission preventing circuit

Country Status (1)

Country Link
JP (1) JPS5710803A (en)

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