Apparatus and method for break recovery in a paper machine or other system

An apparatus, comprising:

• a control module operable to determine one or more setpoint changes for one or more actuators in a process control system, the control module operable to determine the one or more setpoint changes by:
• making larger or more frequent setpoint changes when operating in a first mode;
• and
• making smaller or less frequent setpoint changes when operating in a second mode;
• and
• an interface operable to output the one or more setpoint changes to the one or more actuators;
• wherein the control module comprises:
• control logic operable to determine the smaller or less frequent setpoint changes;
• and
• a gain unit operable to apply again to the smaller or less frequent setpoint changes to produce the larger or more frequent setpoint changes.

A computer readable medium embodying a computer program, the computer program comprising:

• computer readable program code for determining one or more setpoint changes for one or more actuators in a process control system, wherein the computer readable program code for determining the one or more setpoint changes comprises:
• computer readable program code for making larger or more frequent setpoint changes when operating in a first mode;
• and
• computer readable program code for making smaller or less frequent setpoint changes when operating in a second mode;
• and
• computer readable program code for outputting the one or more setpoint changes to the one or more actuators;
• wherein the computer readable program code for making the smaller or less frequent setpoint changes implements control logic for determining the smaller or less frequent setpoint changes;
• and
• wherein the computer readable program code for making the larger or more frequent setpoint changes comprises computer readable program code for applying a gain to the smaller or less frequent setpoint changes.

A system, comprising:

• a paper machine operable to produce a paper sheet, the paper machine comprising a plurality of actuators;
• and
• a controller operable to determine one or more setpoint changes for one or more of the actuators, the controller operable to determine the one or more setpoint changes by:
• making larger or more frequent setpoint changes when operating in a first mode;
• and
• making smaller or less frequent setpoint changes when operating in a second mode;
• wherein the controller:
• control logic operable to determine the smaller or less frequent setpoint changes;
• and
• a gain unit operable to apply a gain to the smaller or less frequent setpoint changes to produce the larger or more frequent setpoint changes.