Title:
PROCESS CONTROLLER
Document Type and Number:
Japanese Patent JPH04299701
Kind Code:
A
Abstract:
PURPOSE:To attain the smooth switching between two controllers. CONSTITUTION:The controllers 5 and 6 contain the upper and lower limit controllers 23 and 24 which set the upper and lower limit levels equivalent to 0% of an operating part at the lower limit side and 100% at the upper limit side respectively. Then an upper limit level setting means changes the upper limit set level between 0% and 100% of the operating part at a fixed changing rate and in preference to the upper limit set value with use of a switch signal that selects one of both controllers 5 and 6. Meanwhile the other upper limit level setting means changes the upper limit set level between 100% and 0% of the operating part at a fixed changing rate in preference to the upper limit set level at a level equivalent to 100% of the operating part.
Inventors:
ISHIZAKI YOSHISUKE
Application Number:
JP8725091A
Publication Date:
October 22, 1992
Filing Date:
March 28, 1991
Export Citation:
Assignee:
TOSHIBA CORP
International Classes:
G05B7/02; G05D7/06; G05D9/12; (IPC1-7): G05B7/02; G05D7/06; G05D9/12
Attorney, Agent or Firm:
Makoto Monda