JPS57141703A - Preventing method for excessive output - Google Patents

Preventing method for excessive output

Info

Publication number
JPS57141703A
JPS57141703A JP2700481A JP2700481A JPS57141703A JP S57141703 A JPS57141703 A JP S57141703A JP 2700481 A JP2700481 A JP 2700481A JP 2700481 A JP2700481 A JP 2700481A JP S57141703 A JPS57141703 A JP S57141703A
Authority
JP
Japan
Prior art keywords
time
circuit
output
timer
pulse train
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
JP2700481A
Other languages
Japanese (ja)
Inventor
Masahide Takahashi
Hiroshi Yotsumoto
Tetsuya Yamada
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
Hitachi Information and Control Systems Inc
Original Assignee
Hitachi Ltd
Hitachi Control Systems 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 Hitachi Ltd, Hitachi Control Systems Inc filed Critical Hitachi Ltd
Priority to JP2700481A priority Critical patent/JPS57141703A/en
Publication of JPS57141703A publication Critical patent/JPS57141703A/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

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 protect a process from confusion, by avoiding an excessive output signal from an output station to the process from being given, when an abnormal excessive output of a process differential compensating amount takes place because of a failure in a computer system. CONSTITUTION:A circuit 21 shown in broken lines is newly provided to a conventional output station 6. This circuit 21 cuts off a pulse train in a time when the total time of the new pulse train is longer than the time set to a timer 25, thereby interrupting the input of a signal to an output value reception section 3. If the next pulse does not entirely come within a prescribed time after the final pulse of a series of pulse train is inputted to a timer 27, the circuit 21 is initialized. Thus, an output signal of a computer system 1 is transmitted to the reception section 3 via a gate circuit 29 only within the time when the timer 25 is in operation.
JP2700481A 1981-02-27 1981-02-27 Preventing method for excessive output Pending JPS57141703A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2700481A JPS57141703A (en) 1981-02-27 1981-02-27 Preventing method for excessive output

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2700481A JPS57141703A (en) 1981-02-27 1981-02-27 Preventing method for excessive output

Publications (1)

Publication Number Publication Date
JPS57141703A true JPS57141703A (en) 1982-09-02

Family

ID=12208974

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2700481A Pending JPS57141703A (en) 1981-02-27 1981-02-27 Preventing method for excessive output

Country Status (1)

Country Link
JP (1) JPS57141703A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62107301A (en) * 1985-11-05 1987-05-18 Mitsubishi Electric Corp Programmable controller
JPH05164508A (en) * 1991-12-18 1993-06-29 Toyota Motor Corp Displacement detector

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62107301A (en) * 1985-11-05 1987-05-18 Mitsubishi Electric Corp Programmable controller
JPH05164508A (en) * 1991-12-18 1993-06-29 Toyota Motor Corp Displacement detector

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