
The proportional multiplier adjusts for the difference (error) between the measured value and the setpoint. Rate (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. Deriv (D). The derivative multiplier (derivative) for this