JPS56143001A - Switching method of control system - Google Patents

Switching method of control system

Info

Publication number
JPS56143001A
JPS56143001A JP4459780A JP4459780A JPS56143001A JP S56143001 A JPS56143001 A JP S56143001A JP 4459780 A JP4459780 A JP 4459780A JP 4459780 A JP4459780 A JP 4459780A JP S56143001 A JPS56143001 A JP S56143001A
Authority
JP
Japan
Prior art keywords
switched
output
limiter
pid controller
control valve
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
JP4459780A
Other languages
Japanese (ja)
Inventor
Kazuyuki Sugaya
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 JP4459780A priority Critical patent/JPS56143001A/en
Publication of JPS56143001A publication Critical patent/JPS56143001A/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
    • G05B7/00—Arrangements for obtaining smooth engagement or disengagement of automatic control
    • G05B7/02—Arrangements for obtaining smooth engagement or disengagement of automatic control electric

Abstract

PURPOSE:To reduce the burden of the operator and to switch the control system not to cause variations in the process, by controlling with one system and switching the control valve of the other system, during the other system is in the waiting state as the spare system. CONSTITUTION:With the system A in control and with the system B in waiting as spare system, when the spare system is switched to the system A, if a change-over switch 13 selects the control from the system A to B, the output of the system A is switched from the output of a PID controller 3 to that of a limiter 4 for rate of change. The limiter 4 reduces the output value of the PID controller 3, and controls the control valve 6 to totally close it. Further, the system A is switched from automatic to manual. The system B is switched from manual to automatic, the output is switched from a signal generator to the PID controller 9, and the control valve 12 is gradually opened in response to the close operation of the control valve 6 of the system B, to suppress the variation of the process. The output of the PID controller 9 is always input to the limiter 10, to obtain the output value of the limiter 10 at start when the system B is switched to the spare system.
JP4459780A 1980-04-07 1980-04-07 Switching method of control system Pending JPS56143001A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4459780A JPS56143001A (en) 1980-04-07 1980-04-07 Switching method of control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4459780A JPS56143001A (en) 1980-04-07 1980-04-07 Switching method of control system

Publications (1)

Publication Number Publication Date
JPS56143001A true JPS56143001A (en) 1981-11-07

Family

ID=12695857

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4459780A Pending JPS56143001A (en) 1980-04-07 1980-04-07 Switching method of control system

Country Status (1)

Country Link
JP (1) JPS56143001A (en)

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