7.1.9 Manual Reset Nr

In a full three-term controller (that is, a PID controller), the integral term automatically removes the steady state error from the setpoint. If the controller is set as a proportional only or PD controller, the integral term will be set to ‘OFF’. Under these conditions the measured value will not settle precisely at setpoint due to the losses in temperature. The Manual Reset parameter (MR) represents the value of the power output that will be delivered when the error is zero. This value must be set manually in order to remove the steady state error.