JPS56143060A - Self-diagnosis for digital input circuit - Google Patents

Self-diagnosis for digital input circuit

Info

Publication number
JPS56143060A
JPS56143060A JP4636280A JP4636280A JPS56143060A JP S56143060 A JPS56143060 A JP S56143060A JP 4636280 A JP4636280 A JP 4636280A JP 4636280 A JP4636280 A JP 4636280A JP S56143060 A JPS56143060 A JP S56143060A
Authority
JP
Japan
Prior art keywords
memory
cpu
input
signal
data
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
JP4636280A
Other languages
Japanese (ja)
Inventor
Hiroshi Yatake
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.)
Meidensha Electric Manufacturing Co Ltd
Original Assignee
Meidensha Electric Manufacturing Co 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 Meidensha Electric Manufacturing Co Ltd filed Critical Meidensha Electric Manufacturing Co Ltd
Priority to JP4636280A priority Critical patent/JPS56143060A/en
Publication of JPS56143060A publication Critical patent/JPS56143060A/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
    • G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
    • G06F11/26—Functional testing
    • G06F11/273—Tester hardware, i.e. output processing circuits
    • G06F11/277—Tester hardware, i.e. output processing circuits with comparison between actual response and known fault-free response

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Test And Diagnosis Of Digital Computers (AREA)
  • Emergency Protection Circuit Devices (AREA)

Abstract

PURPOSE:To make an input printed board self-monitored all the time and to prevent mis-outputs, by providing the input circuit with the memory section storing the test data signal from CPU for processing. CONSTITUTION:When the address through the address bus 10 from CPU judges the device of itself with the receiver 2 and decoder 4, the logical product signal with the OUT signal from the receiver 3 is input to the memory section 5. The memory 5 fetches one of the circuit test signals from the data bus 11, opens the gate of the memory 6 and reads in the test data from CPU to the memory 6. The memory 6 transmits this data to each photocoupler 7 of input circuits ID1-IDn and outputs to the line driver 1 via the amplifier. Input is made to the driver 1 via NAND2, and the gate is open with the signal from the receiver 3 and decoder 4, and the signal from the circuits ID1-IDn is fed to CPU via the bus 11. CPU compares the test data transmitted before with the data from the circuits ID1-IDn and if they are different, they are judged as failure and alarm is output.
JP4636280A 1980-04-09 1980-04-09 Self-diagnosis for digital input circuit Pending JPS56143060A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4636280A JPS56143060A (en) 1980-04-09 1980-04-09 Self-diagnosis for digital input circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4636280A JPS56143060A (en) 1980-04-09 1980-04-09 Self-diagnosis for digital input circuit

Publications (1)

Publication Number Publication Date
JPS56143060A true JPS56143060A (en) 1981-11-07

Family

ID=12745034

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4636280A Pending JPS56143060A (en) 1980-04-09 1980-04-09 Self-diagnosis for digital input circuit

Country Status (1)

Country Link
JP (1) JPS56143060A (en)

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