Delta Electronics VFD-M manual Parameter Settings for Applications

Chapter 4 Parameters

4.2 Parameter Settings for Applications

Speed Search

Applications	Purpose	Functions	Related
			Parameters
Windmill, winding	Restart free-	Before the free-running motor is	Pr.32~Pr.35
machine, fan and all	running motor	completely stopped, it can be restarted
inertia loads		without detection of motor speed. The
		AC motor drive will auto search motor
		speed and will accelerate when its
		speed is the same as the motor speed.
DC Braking before Running
Applications	Purpose	Functions	Related
			Parameters
When e.g. windmills,	Keep the free-	If the running direction of the free-	Pr.28
fans and pumps rotate	running motor at	running motor is not steady, please	Pr.29
freely by wind or flow	standstill.	execute DC braking before start-up.
without applying power
Energy Saving
Applications	Purpose	Functions	Related
			Parameters
Punching machines	Energy saving and	Energy saving when the AC motor	Pr.95
fans, pumps and	less vibrations	drive runs at constant speed, yet full
precision machinery		power acceleration and deceleration
		For precision machinery it also helps
		to lower vibrations.
Multi-step Operation
Applications	Purpose	Functions	Related
			Parameters
	Cyclic operation by	To control 7-step speeds and duration	Pr.17~Pr.23
Conveying machinery			Pr.78~Pr.79
	multi-step speeds.	by simple contact signals.
			Pr.81~Pr.87

4-14 Revision May 2008, ME14, SW V3.04