Operation: Control the Environment
PID controls
Path: Main > Setup > System # > System Config > PID Controls
The Proportional plus Integral plus Derivative (PID) loop is used to control the output of the cool, reheat, and dehumidify modes.
Choose which mode or actuator PID loop to tune, using the 01of03: [Mode/Actuator name] setting.
Mode. Choose the multipliers to use in the PID algorithm. You can omit the derivative or the integral and derivative multipliers in the algorithm.
P.The proportional multiplier (gain) for this mode or actuator. The proportional multiplier adjusts for the difference (error) between the measurement (temperature or humidity) and the setpoint. The proportional multiplier is expressed in percent of output per unit error.
I.The integral multiplier (reset rate) for this mode or actuator. The integral multiplier adjusts for error measurement, and the amount of time that the error has existed. The integral multiplier adds to or subtracts from the output in small increments to correct for the offset error caused by the proportional contribution. It is expressed in percent of output for each minute and unit of error (error multiplied by minutes).
D. The derivative multiplier (derivative) for this mode or actuator. The derivative multiplier adjusts the output for rapid changes in the error, correcting for the rate of change of the error over time. It is expressed in percent of output for each unit of error per minute (error divided by minutes).
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