JPS57111701A - Backup system for digital process control device - Google Patents

Backup system for digital process control device

Info

Publication number
JPS57111701A
JPS57111701A JP18669880A JP18669880A JPS57111701A JP S57111701 A JPS57111701 A JP S57111701A JP 18669880 A JP18669880 A JP 18669880A JP 18669880 A JP18669880 A JP 18669880A JP S57111701 A JPS57111701 A JP S57111701A
Authority
JP
Japan
Prior art keywords
control
control part
current
output
parts
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
JP18669880A
Other languages
Japanese (ja)
Inventor
Haruo Takatsu
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.)
Yokogawa Electric Corp
Original Assignee
Hokushin Electric Works Ltd
Yokogawa Hokushin Electric Corp
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 Hokushin Electric Works Ltd, Yokogawa Hokushin Electric Corp filed Critical Hokushin Electric Works Ltd
Priority to JP18669880A priority Critical patent/JPS57111701A/en
Publication of JPS57111701A publication Critical patent/JPS57111701A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B9/00—Safety arrangements
    • G05B9/02—Safety arrangements electric
    • G05B9/03—Safety arrangements electric with multiple-channel loop, i.e. redundant control systems

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Automation & Control Theory (AREA)
  • Feedback Control In General (AREA)

Abstract

PURPOSE:To make a complicated switching part and etc. unnecessary and to back up the control automatically with a simple constitution, by taking all signals on a transmission line into a waiting operation control part and executing the control operation in this operation control part synchronously with the signal transmission of the current operation control part and performing the control operation immediately when the current operation part is faulty. CONSTITUTION:Signals from a process field 11 are inputted to plural input and output parts 12-14, and output data of input and output parts 12-14 are taken into operation control parts 16 and 17, and outputs of control parts 16 and 17 are outputted to output lines 18 and 19 respectively. These output lines 18 and 19 are connected to respective fixed contacts of a switching part 24, and the movable contact of the switching part 24 is connected to input and output parts 12-14 commonly. Unidirectional signal transfer elements 25 and 26 are connected between output lines 18 and 19 and input and output parts 12 and 14. One control part 16 or 17 is operated as the current control part, and all signals are taken into the waiting control part successively on a basis of the indication of the current control part, and the control operation is performed synchronously with the signal of the current control part, and the control operation is performed immediately when the current operation part is faulty.
JP18669880A 1980-12-29 1980-12-29 Backup system for digital process control device Pending JPS57111701A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18669880A JPS57111701A (en) 1980-12-29 1980-12-29 Backup system for digital process control device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18669880A JPS57111701A (en) 1980-12-29 1980-12-29 Backup system for digital process control device

Publications (1)

Publication Number Publication Date
JPS57111701A true JPS57111701A (en) 1982-07-12

Family

ID=16193062

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18669880A Pending JPS57111701A (en) 1980-12-29 1980-12-29 Backup system for digital process control device

Country Status (1)

Country Link
JP (1) JPS57111701A (en)

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