JPS57174708A - Plant controller - Google Patents

Plant controller

Info

Publication number
JPS57174708A
JPS57174708A JP5848881A JP5848881A JPS57174708A JP S57174708 A JPS57174708 A JP S57174708A JP 5848881 A JP5848881 A JP 5848881A JP 5848881 A JP5848881 A JP 5848881A JP S57174708 A JPS57174708 A JP S57174708A
Authority
JP
Japan
Prior art keywords
station
communication line
communication
common
transmission
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.)
Granted
Application number
JP5848881A
Other languages
Japanese (ja)
Other versions
JPS6326956B2 (en
Inventor
Kanman Hamada
Norihiko Sugimoto
Ikuro Masuda
Jinichi Sakurai
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 JP5848881A priority Critical patent/JPS57174708A/en
Priority to US06/335,689 priority patent/US4500951A/en
Publication of JPS57174708A publication Critical patent/JPS57174708A/en
Publication of JPS6326956B2 publication Critical patent/JPS6326956B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/22—Detection or location of defective computer hardware by testing during standby operation or during idle time, e.g. start-up testing
    • 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
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F11/00—Error detection; Error correction; Monitoring
    • G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
    • G06F11/16—Error detection or correction of the data by redundancy in hardware
    • G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
    • G06F11/202—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements where processing functionality is redundant
    • G06F11/2023—Failover techniques
    • G06F11/2033—Failover techniques switching over of hardware resources

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Quality & Reliability (AREA)
  • Computer Hardware Design (AREA)
  • Automation & Control Theory (AREA)
  • Selective Calling Equipment (AREA)

Abstract

PURPOSE:To attain an LSI conversion, by connecting each controller station equivalently to a circular communication line, using each controller station in common with a communication interface circuit and a self-diagnosis circuit and sending sequentially the statation having the control right for transmission. CONSTITUTION:A circular connection is given with a double system equivalent type communication line 7 between the function module groups including controller stations 1 and 2, a display station 5 and an N:1 backup station 4. A task relation to an exclusive function, a communication interface circuit 11 which shares the common communication/diagnosis function and a silf-diagnosis circuit 12 are provided in common to each function module. Each station monitors the existence of the transmission right signal on the communication line through a monitor mechanism using a self-excited timer and confirms that only the signal exists on the communication line. Thus the station having the transmission control right can be sent sequentially. In such way, the reliability is increased for the communication system and at the same time an LSI conversion is possible.
JP5848881A 1981-01-07 1981-04-20 Plant controller Granted JPS57174708A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP5848881A JPS57174708A (en) 1981-04-20 1981-04-20 Plant controller
US06/335,689 US4500951A (en) 1981-01-07 1981-12-30 Plant control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5848881A JPS57174708A (en) 1981-04-20 1981-04-20 Plant controller

Publications (2)

Publication Number Publication Date
JPS57174708A true JPS57174708A (en) 1982-10-27
JPS6326956B2 JPS6326956B2 (en) 1988-06-01

Family

ID=13085810

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5848881A Granted JPS57174708A (en) 1981-01-07 1981-04-20 Plant controller

Country Status (1)

Country Link
JP (1) JPS57174708A (en)

Also Published As

Publication number Publication date
JPS6326956B2 (en) 1988-06-01

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