JPS5614302A - Process control system - Google Patents

Process control system

Info

Publication number
JPS5614302A
JPS5614302A JP8820579A JP8820579A JPS5614302A JP S5614302 A JPS5614302 A JP S5614302A JP 8820579 A JP8820579 A JP 8820579A JP 8820579 A JP8820579 A JP 8820579A JP S5614302 A JPS5614302 A JP S5614302A
Authority
JP
Japan
Prior art keywords
subsystem
auxiliary
control part
faulty
aux
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
JP8820579A
Other languages
Japanese (ja)
Inventor
Satoshi Matsuo
Katsuji Murai
Yukinori Kodama
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 JP8820579A priority Critical patent/JPS5614302A/en
Publication of JPS5614302A publication Critical patent/JPS5614302A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make it possible to back up the system with one auxiliary subsystem, by transferring the control program of a faulty subsystem to the auxiliary subsystem in case of fault of the subsystem in the process control system having plural subsystem.
CONSTITUTION: When control part 34 of subsystem 4 becomes faulty, control part 34 sends the contact signal to loop control part 24, control part 35 os auxiliary system Aux, and process input/output unit 16. Loop control part 24 disconnects subsystem 4 from series loop 10. Control part 35 causes loop control part 25 to connect series loop 10 and auxiliary system Aux and sends OS of memory 44 of faulty subsystem 4 to memory 45 of auxiliary system Aux through memory bus 17. Process I/0 unit 16 switches the driving part from driving part 16a for normalcy to auxiliary driving part 16b. As a result, auxiliary subsystem Aux operates in stead of faulty subsystem 4.
COPYRIGHT: (C)1981,JPO&Japio
JP8820579A 1979-07-13 1979-07-13 Process control system Pending JPS5614302A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8820579A JPS5614302A (en) 1979-07-13 1979-07-13 Process control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8820579A JPS5614302A (en) 1979-07-13 1979-07-13 Process control system

Publications (1)

Publication Number Publication Date
JPS5614302A true JPS5614302A (en) 1981-02-12

Family

ID=13936392

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8820579A Pending JPS5614302A (en) 1979-07-13 1979-07-13 Process control system

Country Status (1)

Country Link
JP (1) JPS5614302A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161901A (en) * 1981-03-31 1982-10-05 Hitachi Ltd Plant control device
JPS57174701A (en) * 1981-04-20 1982-10-27 Hitachi Ltd Decentralized controlling system
JPS5868104A (en) * 1981-10-16 1983-04-22 Yokogawa Hokushin Electric Corp Redundant decentralized controller
JPS5868103A (en) * 1981-10-17 1983-04-22 Yokogawa Hokushin Electric Corp Redundant decentralized controller
JPS5868102A (en) * 1981-10-17 1983-04-22 Yokogawa Hokushin Electric Corp Redundant decentralized controller
JPS5884307A (en) * 1981-11-16 1983-05-20 Toshiba Mach Co Ltd Programmable sequence controller
JPS5887323A (en) * 1981-11-16 1983-05-25 Teijin Ltd Preparation of heat-resistant spun yarn

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478945A (en) * 1977-12-06 1979-06-23 Toshiba Corp Process control computer system

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5478945A (en) * 1977-12-06 1979-06-23 Toshiba Corp Process control computer system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57161901A (en) * 1981-03-31 1982-10-05 Hitachi Ltd Plant control device
JPS57174701A (en) * 1981-04-20 1982-10-27 Hitachi Ltd Decentralized controlling system
JPS6361681B2 (en) * 1981-04-20 1988-11-30
JPS5868104A (en) * 1981-10-16 1983-04-22 Yokogawa Hokushin Electric Corp Redundant decentralized controller
JPS5868103A (en) * 1981-10-17 1983-04-22 Yokogawa Hokushin Electric Corp Redundant decentralized controller
JPS5868102A (en) * 1981-10-17 1983-04-22 Yokogawa Hokushin Electric Corp Redundant decentralized controller
JPS5884307A (en) * 1981-11-16 1983-05-20 Toshiba Mach Co Ltd Programmable sequence controller
JPS5887323A (en) * 1981-11-16 1983-05-25 Teijin Ltd Preparation of heat-resistant spun yarn
JPS6317126B2 (en) * 1981-11-16 1988-04-12 Teijin Ltd
JPH0157802B2 (en) * 1981-11-16 1989-12-07 Toshiba Machine Co Ltd

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