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JPS5788598A - Fault detecting method of storage device - Google Patents

Fault detecting method of storage device

Info

Publication number
JPS5788598A
JPS5788598A JP55138045A JP13804580A JPS5788598A JP S5788598 A JPS5788598 A JP S5788598A JP 55138045 A JP55138045 A JP 55138045A JP 13804580 A JP13804580 A JP 13804580A JP S5788598 A JPS5788598 A JP S5788598A
Authority
JP
Japan
Prior art keywords
contents
ram116
processor
address
storage
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
JP55138045A
Other languages
Japanese (ja)
Inventor
Tetsuo Hirayama
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.)
Yokogawa Electric Corp
Original Assignee
Hokushin Electric Works Ltd
Yokogawa Hokushin Electric 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 Hokushin Electric Works Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP55138045A priority Critical patent/JPS5788598A/en
Publication of JPS5788598A publication Critical patent/JPS5788598A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Techniques For Improving Reliability Of Storages (AREA)

Abstract

PURPOSE:To increase the reliability of the checking function without erasing the contents of storage, by periodically calculating the contents of the address in a prescribed range of a storage device during the actual working and then comparing the result of calculation with the contents of a specific address. CONSTITUTION:When a main power supply 114 becomes faulty during its working to cause a voltage drop, a fault detecting circuit 121 detects this and this detection signal is supplied to a processor 111 in the form of an interruption signal. The processor 111 actuates a power supply changeover device 117 and connects a battery 115 only to an RAM116 to protect the storage of the RAM116. Then the idle time of the processor 111 is detected, and this idle time is utilized to carry out an addition from an address (m) to (n) of the RAM116. This result of addition is compared with the contents of an address n+1, and the coincidence or dissidence is detected to decide the working state of the RAM. Accordingly no erasion of the storage contact is caused at all since no breakdown is given to the contents of the RAM116 although the operation of the processor is discontinued.
JP55138045A 1980-11-21 1980-11-21 Fault detecting method of storage device Pending JPS5788598A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55138045A JPS5788598A (en) 1980-11-21 1980-11-21 Fault detecting method of storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55138045A JPS5788598A (en) 1980-11-21 1980-11-21 Fault detecting method of storage device

Publications (1)

Publication Number Publication Date
JPS5788598A true JPS5788598A (en) 1982-06-02

Family

ID=15212713

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55138045A Pending JPS5788598A (en) 1980-11-21 1980-11-21 Fault detecting method of storage device

Country Status (1)

Country Link
JP (1) JPS5788598A (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS593796A (en) * 1982-06-29 1984-01-10 Shinko Electric Co Ltd Checking method of data in memory
JPS59140699A (en) * 1983-01-31 1984-08-13 Fujitsu Ltd Checking system of memory contents
JPS59178699A (en) * 1983-03-29 1984-10-09 Shimadzu Corp Data processing device
JPS59178700A (en) * 1983-03-29 1984-10-09 Shimadzu Corp Data processing device
JPS59217418A (en) * 1983-05-24 1984-12-07 Noritsu Co Ltd Combustion controller
JPS605363A (en) * 1983-06-22 1985-01-11 Sharp Corp Confirmation system for memory contents
JPS6040381A (en) * 1983-08-12 1985-03-02 三菱電機株式会社 Protective device of controller for elevator
JPS6055456A (en) * 1983-09-05 1985-03-30 Mitsubishi Electric Corp Memory protecting circuit
JPS60173093U (en) * 1984-04-26 1985-11-16 富士電機株式会社 Control device internal clock correction device
JPS6349956A (en) * 1986-08-20 1988-03-02 Canon Inc Memory control system
JPS63268036A (en) * 1987-04-27 1988-11-04 Oki Electric Ind Co Ltd Detecting/recovering method for abnormal operating of signal processor
JPH04542A (en) * 1990-04-17 1992-01-06 Pfu Ltd Memory checking system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS593796A (en) * 1982-06-29 1984-01-10 Shinko Electric Co Ltd Checking method of data in memory
JPS59140699A (en) * 1983-01-31 1984-08-13 Fujitsu Ltd Checking system of memory contents
JPS59178699A (en) * 1983-03-29 1984-10-09 Shimadzu Corp Data processing device
JPS59178700A (en) * 1983-03-29 1984-10-09 Shimadzu Corp Data processing device
JPS59217418A (en) * 1983-05-24 1984-12-07 Noritsu Co Ltd Combustion controller
JPS605363A (en) * 1983-06-22 1985-01-11 Sharp Corp Confirmation system for memory contents
JPS6040381A (en) * 1983-08-12 1985-03-02 三菱電機株式会社 Protective device of controller for elevator
JPS6055456A (en) * 1983-09-05 1985-03-30 Mitsubishi Electric Corp Memory protecting circuit
JPS60173093U (en) * 1984-04-26 1985-11-16 富士電機株式会社 Control device internal clock correction device
JPS6349956A (en) * 1986-08-20 1988-03-02 Canon Inc Memory control system
JPS63268036A (en) * 1987-04-27 1988-11-04 Oki Electric Ind Co Ltd Detecting/recovering method for abnormal operating of signal processor
JPH04542A (en) * 1990-04-17 1992-01-06 Pfu Ltd Memory checking system

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