Program features 49Pump control featuresNote: ABB recommends reading the pump manufacturer’s instructions for optimalperformance. Reference rampingAcceleration and deceleration ramping times can be set individually for speed andfrequency reference (Menu - Primary settings - Ramps).With a speed or frequency reference, the ramps are defined as the time it takes forthe drive to accelerate or decelerate between zero speed or frequency and the valuedefined by parameter 46.01 Speed scaling or 46.02 Frequency scaling. For speedand frequency reference, also the shape of the ramp can be controlled.Special acceleration/deceleration rampsThe change rate of the motor potentiometer function (page 80) is adjustable. Thesame rate applies in both directions.A deceleration ramp can be defined for emergency stop (“Off3” mode).Pump protections - Quick rampsThe quick ramp function allows you to use two additional ramp sets to accelerate ordecelerate the pump. The following figure illustrates the acceleration in a quick rampmode when both additional ramp sets are used.In submersible (a.k.a borehole) pumps, the mechanical wearing of bearings can bereduced by ramping the pump quickly to a certain speed.1 82.07 Quick ramp 1 upper limit2 82.12 Quick ramp 2 upper limita First stage of accelerationb Second stage of accelerationc Third stage of accelerationa b c TimeSpeed reference [rpm]12
