Title:
PID CONTROLLER
Document Type and Number:
Japanese Patent JPH052401
Kind Code:
A
Abstract:
PURPOSE:To prevent the level variance of a controlled variable kept in a stable state when the set value is manually changed in an automatic control mode. CONSTITUTION:The set value SV varies with push of a set-down button 12 even if the process value PV is ket at a fixed level. Thus a deviation epsilon is produced between both values PV and SV. When a manual operating state detecting circuit 16 detects a manual operating state, a manipulated variable tracking means 17 restrains a proportion gain multiplication means 5 from outputting a manipulated variable MV and outputs the manipulated variable which is already read and not manually operated yet to a controlled system 6. Therefore no variance is caused to the level of the stable value PV even though the value SV is changed.
Inventors:
ONO MAKOTO
Application Number:
JP15323591A
Publication Date:
January 08, 1993
Filing Date:
June 25, 1991
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
G05B11/36; G05B7/02; G05B21/02; (IPC1-7): G05B11/36; G05B21/02
Attorney, Agent or Firm:
Kazuo Sato (3 others)
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