JPS55103604A - Fault diagnosis system of digital control unit - Google Patents

Fault diagnosis system of digital control unit

Info

Publication number
JPS55103604A
JPS55103604A JP1045879A JP1045879A JPS55103604A JP S55103604 A JPS55103604 A JP S55103604A JP 1045879 A JP1045879 A JP 1045879A JP 1045879 A JP1045879 A JP 1045879A JP S55103604 A JPS55103604 A JP S55103604A
Authority
JP
Japan
Prior art keywords
signal
control unit
digital control
memory circuit
deviation
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
JP1045879A
Other languages
Japanese (ja)
Inventor
Shinichi Tajima
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
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP1045879A priority Critical patent/JPS55103604A/en
Publication of JPS55103604A publication Critical patent/JPS55103604A/en
Pending legal-status Critical Current

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  • Testing And Monitoring For Control Systems (AREA)

Abstract

PURPOSE: To detect faults to prevent overrun of operation ends by providing a circuit, which detects rapid change of output signals, in a digital control unit.
CONSTITUTION: Output signal 3 of digital control unit 2 is fatched as inputs of signal memory circuit 11 and deviation detection circuit 12. Signal memory circuit 11 operates to update the output signal as fixed period T by the signal from counter 9. Deviation detection circuit 12 detects deviation between input signal 3 and memory circuit 5; and if the detected value is larger than set value 13, large-deviation signal 6 is issued. Signal 6 lights an indicator lamp, and further, inhibits update of memory circuit 11.
COPYRIGHT: (C)1980,JPO&Japio
JP1045879A 1979-02-02 1979-02-02 Fault diagnosis system of digital control unit Pending JPS55103604A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1045879A JPS55103604A (en) 1979-02-02 1979-02-02 Fault diagnosis system of digital control unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1045879A JPS55103604A (en) 1979-02-02 1979-02-02 Fault diagnosis system of digital control unit

Publications (1)

Publication Number Publication Date
JPS55103604A true JPS55103604A (en) 1980-08-08

Family

ID=11750688

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1045879A Pending JPS55103604A (en) 1979-02-02 1979-02-02 Fault diagnosis system of digital control unit

Country Status (1)

Country Link
JP (1) JPS55103604A (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5028746A (en) * 1973-07-13 1975-03-24

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5028746A (en) * 1973-07-13 1975-03-24

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