JPS5450772A - Erroneous control preventive method in process control system - Google Patents

Erroneous control preventive method in process control system

Info

Publication number
JPS5450772A
JPS5450772A JP11717677A JP11717677A JPS5450772A JP S5450772 A JPS5450772 A JP S5450772A JP 11717677 A JP11717677 A JP 11717677A JP 11717677 A JP11717677 A JP 11717677A JP S5450772 A JPS5450772 A JP S5450772A
Authority
JP
Japan
Prior art keywords
printed circuit
circuit plates
interface unit
pwb
erroneous
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
JP11717677A
Other languages
Japanese (ja)
Inventor
Saburo Hayato
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP11717677A priority Critical patent/JPS5450772A/en
Publication of JPS5450772A publication Critical patent/JPS5450772A/en
Pending legal-status Critical Current

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  • Safety Devices In Control Systems (AREA)

Abstract

PURPOSE: To narrow the extent of the system-down as well as to dissolve erroneous control and erroneous transmission followed after exchanging printed circuit plates, etc. by providing a function to discriminate normally the rigging of the printed circuit plates installed on an interface unit.
CONSTITUTION: An electronic computer 1 is connected through an interface unit 2 to a process unit 3, the interface unit 2 incorporates n-pieces of printed circuit plates PWB. Electroconductive parts (A) are provided on respective printed circuit plates PWB resulting in that in-between portions of terminals of connecting plugs whereinto the printed circuit plates PWB are inserted are short-circuited by the electroconductive parts (A). Information that in-between portions of the terminals of these connecting plugs are short-circuited, in other words, the printed circuit plates are normally inserted is given the input to the electronic computer 1, and it begins control operation upon confirming the normality of the interface unit 2 from this information
COPYRIGHT: (C)1979,JPO&Japio
JP11717677A 1977-09-29 1977-09-29 Erroneous control preventive method in process control system Pending JPS5450772A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11717677A JPS5450772A (en) 1977-09-29 1977-09-29 Erroneous control preventive method in process control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11717677A JPS5450772A (en) 1977-09-29 1977-09-29 Erroneous control preventive method in process control system

Publications (1)

Publication Number Publication Date
JPS5450772A true JPS5450772A (en) 1979-04-20

Family

ID=14705304

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11717677A Pending JPS5450772A (en) 1977-09-29 1977-09-29 Erroneous control preventive method in process control system

Country Status (1)

Country Link
JP (1) JPS5450772A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5764802A (en) * 1980-10-08 1982-04-20 Toshiba Corp Controller
JPS5764803A (en) * 1980-10-01 1982-04-20 Ibm Moduled controller

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5764803A (en) * 1980-10-01 1982-04-20 Ibm Moduled controller
JPH01113702U (en) * 1980-10-01 1989-07-31
JPS5764802A (en) * 1980-10-08 1982-04-20 Toshiba Corp Controller

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