Patent Document ID: 7669777
Application ID: 11811767
Patent Flag: 1

Claim One:
1. A method for implementing PID control having a proportional term, an integral term, and a derivative term, the method comprising: measuring a controlled variable; calculating an error between the controlled variable and a desired condition; comparing the error to a threshold; if the error is greater than the threshold, setting a PID output to a maximum value and accumulating the integral term; if the error is less than the threshold, determining whether the error is within a deadband; if the error is within the deadband, calculating the PID output by updating only the proportional term; and if the error is outside the deadband, calculating the PID output by updating the proportional term and the integral term; adjusting a control set point based upon the PID output; and controlling an adjustable control element of a control system based upon the control set point.