Delta Electronics VFD-M manual Skip Frequency Setting

Chapter 4 Parameters

Skip Frequency Setting

Applications	Purpose	Functions	Related
			Parameters
		The AC motor drive cannot run at	Pr.67~Pr.70
Pumps and fans	To prevent	constant speed in the skip frequency
	machine vibrations	range. Three skip frequency ranges
		can be set.
Carrier Frequency Setting
Applications	Purpose	Functions	Related
			Parameters
General application	Low noise	The carrier frequency can be	Pr.71
		increased when required to reduce
		motor noise.
Keep Running when Frequency Command is Lost
Applications	Purpose	Functions	Related
			Parameters
		When the frequency command is lost	Pr.63
Air conditioners	For continuous	by system malfunction, the AC motor
	operation	drive can still run. Suitable for
		intelligent air conditioners.
Output Signal in Zero Speed
Applications	Purpose	Functions	Related
			Parameters
	Provide a signal for	When the output frequency is lower	Pr.45
General application		than the min. output frequency, a	Pr.46
	running status	signal is given for external system or
		control wiring.
Output Signal at Master Frequency
Applications	Purpose	Functions	Related
			Parameters
		When the output frequency is at the	Pr.45
General application	Provide a signal for	master frequency (by frequency	Pr.46
		command), a signal is given for
	running status	external system or control wiring
		(frequency attained).

Revision May 2008, ME14, SW V3.04 4-17