JPS5779513A - Controller for process control - Google Patents

Controller for process control

Info

Publication number
JPS5779513A
JPS5779513A JP55153886A JP15388680A JPS5779513A JP S5779513 A JPS5779513 A JP S5779513A JP 55153886 A JP55153886 A JP 55153886A JP 15388680 A JP15388680 A JP 15388680A JP S5779513 A JPS5779513 A JP S5779513A
Authority
JP
Japan
Prior art keywords
signal
output
controller
operator
controlled
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
JP55153886A
Other languages
Japanese (ja)
Inventor
Tetsuo Suehiro
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 JP55153886A priority Critical patent/JPS5779513A/en
Publication of JPS5779513A publication Critical patent/JPS5779513A/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
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
    • G05B23/0256—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults injecting test signals and analyzing monitored process response, e.g. injecting the test signal while interrupting the normal operation of the monitored system; superimposing the test signal onto a control signal during normal operation of the monitored system
    • 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
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
    • G05B23/0267—Fault communication, e.g. human machine interface [HMI]
    • G05B23/0272—Presentation of monitored results, e.g. selection of status reports to be displayed; Filtering information to the user

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Human Computer Interaction (AREA)
  • Testing And Monitoring For Control Systems (AREA)

Abstract

PURPOSE:To monitor faults of a process by superposing a distrubing signal, which is small enough not to exert an evil influence upon the process, on the operation output of a controller and monitoring the result by a controlled-variable signal. CONSTITUTION:A controlled-variable signal EPV and a setpoint signal ESV from a target-value setter 5 are applied to a difference output device 11, whose difference signal is processed by control operations, such as proportional and integral operations, at a control operator 2 to obtain an output signal EC. The output signal EC is added to a disturbing signal EN from a disturbing-signal generator 3 to obtain the output EMV of a controller, which drives an operator 7. A fault detector 4 predetermines the variation of a prescribed controlled- variable signal EPV for the distrubing signal EN from the generator 3 and, when signal requirements are not met, outputs a fault signal EFL. Warning display is performed by the fault signal EFL to let an operator at a plant know that.
JP55153886A 1980-11-04 1980-11-04 Controller for process control Pending JPS5779513A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55153886A JPS5779513A (en) 1980-11-04 1980-11-04 Controller for process control

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55153886A JPS5779513A (en) 1980-11-04 1980-11-04 Controller for process control

Publications (1)

Publication Number Publication Date
JPS5779513A true JPS5779513A (en) 1982-05-18

Family

ID=15572256

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55153886A Pending JPS5779513A (en) 1980-11-04 1980-11-04 Controller for process control

Country Status (1)

Country Link
JP (1) JPS5779513A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61107405A (en) * 1984-10-31 1986-05-26 Hitachi Ltd drive device
JPH02116358A (en) * 1988-10-26 1990-05-01 Olympus Optical Co Ltd Ultrasonic endoscope

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61107405A (en) * 1984-10-31 1986-05-26 Hitachi Ltd drive device
JPH02116358A (en) * 1988-10-26 1990-05-01 Olympus Optical Co Ltd Ultrasonic endoscope

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