JPS5688520A - Malfunction preventing system - Google Patents

Malfunction preventing system

Info

Publication number
JPS5688520A
JPS5688520A JP16655479A JP16655479A JPS5688520A JP S5688520 A JPS5688520 A JP S5688520A JP 16655479 A JP16655479 A JP 16655479A JP 16655479 A JP16655479 A JP 16655479A JP S5688520 A JPS5688520 A JP S5688520A
Authority
JP
Japan
Prior art keywords
voltage
controlled
detection line
input
potential
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
JP16655479A
Other languages
Japanese (ja)
Inventor
Shigeru Yamakawa
Yukio Goto
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP16655479A priority Critical patent/JPS5688520A/en
Publication of JPS5688520A publication Critical patent/JPS5688520A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To prevent a fault due to malfunction of a device to be controlled even if malfunction occurs at a controller side, by providing a signal line that transmits the power voltage of a logic circuit in the controller to the device to be controlled and also by providing the device to be controlled with a means of detecting the potential of the signal line.
CONSTITUTION: Logic circuit 2 of the controller, receiving an operating voltage from power source 1, sends a control signal to driving circuit 4 via interface IF31, bus 6, and input-output side IF32 of a device to be controlled, such as a line printer, to drive mechanism part 5. The power voltage of the controller side is applied to the input-output device to be controlled by way of power voltage detection line 7. At the input-output device side, specific supply voltage V for the input-output device itself can be applied to detection line 7 via diode D2 and voltage source Vcc higher than a prescribed voltage is connected via resistance R so as to hold detection line 7 at the voltage. The potential of detection line 7 is compared by comparator 8 with a prescribed potential obtained by resistances r1 and r2 and when the potential of detection line 7 is lower, control signal 9 is sent to circuit 4 to suppress the driving operation of mechanism part 8.
COPYRIGHT: (C)1981,JPO&Japio
JP16655479A 1979-12-21 1979-12-21 Malfunction preventing system Pending JPS5688520A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16655479A JPS5688520A (en) 1979-12-21 1979-12-21 Malfunction preventing system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16655479A JPS5688520A (en) 1979-12-21 1979-12-21 Malfunction preventing system

Publications (1)

Publication Number Publication Date
JPS5688520A true JPS5688520A (en) 1981-07-18

Family

ID=15833407

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16655479A Pending JPS5688520A (en) 1979-12-21 1979-12-21 Malfunction preventing system

Country Status (1)

Country Link
JP (1) JPS5688520A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6082724U (en) * 1983-11-15 1985-06-07 岩崎通信機株式会社 Processor stop state detection and display device in magnetic printing device

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4818041B1 (en) * 1967-01-23 1973-06-02

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4818041B1 (en) * 1967-01-23 1973-06-02

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6082724U (en) * 1983-11-15 1985-06-07 岩崎通信機株式会社 Processor stop state detection and display device in magnetic printing device

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