JPS5657103A - Preventing device for erroneous control of controlling computer - Google Patents

Preventing device for erroneous control of controlling computer

Info

Publication number
JPS5657103A
JPS5657103A JP13298279A JP13298279A JPS5657103A JP S5657103 A JPS5657103 A JP S5657103A JP 13298279 A JP13298279 A JP 13298279A JP 13298279 A JP13298279 A JP 13298279A JP S5657103 A JPS5657103 A JP S5657103A
Authority
JP
Japan
Prior art keywords
relay
anomaly
contact
erroneous control
control
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
JP13298279A
Other languages
Japanese (ja)
Inventor
Hironobu Watanabe
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 JP13298279A priority Critical patent/JPS5657103A/en
Publication of JPS5657103A publication Critical patent/JPS5657103A/en
Pending legal-status Critical Current

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  • Safety Devices In Control Systems (AREA)

Abstract

PURPOSE: To make it possible to prevent efficiently erroneous control, by monitoring periodically whether control command logic, input point information of the input device, and output point information of the output device are present or not respectively.
CONSTITUTION: In computer 1, three elements, namely, control command logic, input point 12 of relay 6 in the input device, and output point 11 of relay 6 in the output device are monitored. If one or two of these three elements do not exist, anomaly is decided, and contact 7A of relay 7 for erroneous control prevention is turned off, and contact 8A of relay 8 for anomaly detection is closed to display anomaly of the input device, the output device, and so on. Since contact 7A is turned off for anomaly in this manner, operation commands (electric power applying) to control device 5 are not issued independently of the switching state of contact 6B of relay 6. As a result, erroneous control for anomaly is prevented. Thus, erroneous control can be prevented efficiently.
COPYRIGHT: (C)1981,JPO&Japio
JP13298279A 1979-10-17 1979-10-17 Preventing device for erroneous control of controlling computer Pending JPS5657103A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13298279A JPS5657103A (en) 1979-10-17 1979-10-17 Preventing device for erroneous control of controlling computer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13298279A JPS5657103A (en) 1979-10-17 1979-10-17 Preventing device for erroneous control of controlling computer

Publications (1)

Publication Number Publication Date
JPS5657103A true JPS5657103A (en) 1981-05-19

Family

ID=15094013

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13298279A Pending JPS5657103A (en) 1979-10-17 1979-10-17 Preventing device for erroneous control of controlling computer

Country Status (1)

Country Link
JP (1) JPS5657103A (en)

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