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SE8205152D0 - WATCH-DOG TIMER CIRCUIT - Google Patents

WATCH-DOG TIMER CIRCUIT

Info

Publication number
SE8205152D0
SE8205152D0 SE8205152A SE8205152A SE8205152D0 SE 8205152 D0 SE8205152 D0 SE 8205152D0 SE 8205152 A SE8205152 A SE 8205152A SE 8205152 A SE8205152 A SE 8205152A SE 8205152 D0 SE8205152 D0 SE 8205152D0
Authority
SE
Sweden
Prior art keywords
power plant
control pulses
control system
control
watch
Prior art date
Application number
SE8205152A
Other languages
Swedish (sv)
Other versions
SE8205152L (en
Inventor
T S Malinowski
A E Taylor
Original Assignee
United Technologies 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 United Technologies Corp filed Critical United Technologies Corp
Publication of SE8205152D0 publication Critical patent/SE8205152D0/en
Publication of SE8205152L publication Critical patent/SE8205152L/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/14—Error detection or correction of the data by redundancy in operation
    • G06F11/1402—Saving, restoring, recovering or retrying
    • G06F11/1415—Saving, restoring, recovering or retrying at system level
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0706—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment
    • G06F11/0736—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation the processing taking place on a specific hardware platform or in a specific software environment in functional embedded systems, i.e. in a data processing system designed as a combination of hardware and software dedicated to performing a certain function
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0751—Error or fault detection not based on redundancy
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0751—Error or fault detection not based on redundancy
    • G06F11/0754—Error or fault detection not based on redundancy by exceeding limits
    • G06F11/0757—Error or fault detection not based on redundancy by exceeding limits by exceeding a time limit, i.e. time-out, e.g. watchdogs
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/0703—Error or fault processing not based on redundancy, i.e. by taking additional measures to deal with the error or fault not making use of redundancy in operation, in hardware, or in data representation
    • G06F11/0793—Remedial or corrective actions

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Safety Devices In Control Systems (AREA)
  • Testing And Monitoring For Control Systems (AREA)
  • Fuel Cell (AREA)
  • Power Sources (AREA)
  • Debugging And Monitoring (AREA)

Abstract

A watch-dog timer monitor for the control system of a power plant including a pulse monitor which measures the length of time between successive control pulses from an output port of a computer. In the event that any control pulses exceeds the preselected time interval, the pulse monitor sends a disable signal through a latch to the buffers in the path of the control signals. The buffers instantaneously transition to a blocked condition preventing any subsequent control pulses from reaching the control system of the power plant. A reset button is toggled to reset an initializer which restarts the program in the computer. A start-up delay is also provided to insure that no spurious control pulses reach the control system of the power plant during a warm-up period when the digital logic circuits are settling out.
SE8205152A 1981-09-14 1982-09-10 KONTROLLTIDKRETS SE8205152L (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US30179881A 1981-09-14 1981-09-14

Publications (2)

Publication Number Publication Date
SE8205152D0 true SE8205152D0 (en) 1982-09-10
SE8205152L SE8205152L (en) 1983-03-15

Family

ID=23164929

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8205152A SE8205152L (en) 1981-09-14 1982-09-10 KONTROLLTIDKRETS

Country Status (17)

Country Link
JP (1) JPS5860309A (en)
AU (1) AU560530B2 (en)
BE (1) BE894388A (en)
BR (1) BR8205190A (en)
CA (1) CA1190307A (en)
CH (1) CH659718A5 (en)
DE (1) DE3232513A1 (en)
DK (1) DK402282A (en)
ES (1) ES8306411A1 (en)
FR (1) FR2512978B1 (en)
GB (1) GB2105877A (en)
IL (1) IL66716A (en)
IT (1) IT1152572B (en)
MX (1) MX151842A (en)
NO (1) NO823071L (en)
SE (1) SE8205152L (en)
ZA (1) ZA826740B (en)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59211143A (en) * 1983-05-17 1984-11-29 Nissan Motor Co Ltd Car control circuit using microcomputer
DE3332802A1 (en) * 1983-09-12 1985-03-28 Siemens AG, 1000 Berlin und 8000 München CIRCUIT ARRANGEMENT FOR CHECKING THE CORRECT STARTING OF A TWO-CHANNEL FAIL-SAFE MICROCOMPUTER SWITCHGEAR, ESPECIALLY FOR RAILWAY LOCKING SYSTEMS
JPS60239803A (en) * 1984-05-15 1985-11-28 Yokogawa Hokushin Electric Corp Dispersion type control system
JPS6155746U (en) * 1984-09-19 1986-04-15
US4747057A (en) * 1985-03-12 1988-05-24 Pitney Bowes Inc. Electronic postage meter having power up and power down protection circuitry
US4701856A (en) * 1985-03-12 1987-10-20 Pitney Bowes Inc. Reset delay circuit for an electronic postage meter
DE3603807C1 (en) * 1986-02-07 1987-07-30 Triumph Adler Ag Method and circuit arrangement for protecting typewriters or similar office machines against the consequences of electrostatic discharges
GB2187909B (en) * 1986-03-13 1990-09-12 Lake Electronic Tech An interface circuit
GB8630674D0 (en) * 1986-12-23 1987-02-04 Qualter Hall & Co Ltd Microprocessor-based controllers
GB2200476B (en) * 1987-01-29 1991-02-06 British Gas Plc Monitor system
DD275546A1 (en) * 1988-09-16 1990-01-24 Adw Ddr Kybernetik Inf METHOD AND ARRANGEMENT FOR TESTING MICRORE-DRIVEN MODULES AND DEVICES
JP2008262740A (en) * 2007-04-10 2008-10-30 Toshiba Fuel Cell Power Systems Corp Fuel cell power generation system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2636352C3 (en) * 1976-08-12 1979-12-20 Kraftwerk Union Ag, 4330 Muelheim Protection system for a nuclear reactor
US4118792A (en) * 1977-04-25 1978-10-03 Allen-Bradley Company Malfunction detection system for a microprocessor based programmable controller
DE2851190C3 (en) * 1978-11-27 1981-06-11 Nsm-Apparatebau Gmbh & Co Kg, 6530 Bingen Fault protection arrangement
GB2087119B (en) * 1980-11-06 1985-05-15 British Gas Corp Fail-safe supervisory circuit

Also Published As

Publication number Publication date
FR2512978A1 (en) 1983-03-18
IL66716A (en) 1985-08-30
ES515665A0 (en) 1983-06-01
MX151842A (en) 1985-04-01
IT8223256A0 (en) 1982-09-14
AU560530B2 (en) 1987-04-09
AU8832082A (en) 1983-03-24
NO823071L (en) 1983-03-15
SE8205152L (en) 1983-03-15
IT1152572B (en) 1987-01-07
ZA826740B (en) 1983-07-27
BE894388A (en) 1983-01-03
JPS5860309A (en) 1983-04-09
ES8306411A1 (en) 1983-06-01
BR8205190A (en) 1983-08-16
FR2512978B1 (en) 1988-02-19
CH659718A5 (en) 1987-02-13
CA1190307A (en) 1985-07-09
DE3232513A1 (en) 1983-03-24
GB2105877A (en) 1983-03-30
DK402282A (en) 1983-03-15

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NAV Patent application has lapsed

Ref document number: 8205152-5

Effective date: 19880624