Delta Electronics VFD-VL manual 05-14, 05-15, 05-16, 05-17, 05-18

Chapter 4 Parameters

When the asynchronous motor is driven by the drive, the load and slip will be increased. This parameter can be used to correct frequency and lower the slip to make the motor can run near the synchronous speed under rated current. When the output current is larger than the motor no-load current, the drive will compensate the frequency by Pr.05-13 setting. If the actual speed is slower than expectation, please increase the setting and vice versa.

It is only valid in SVC mode.

05-14	Slip Deviation Level				Unit: 1
Control	VFPG	SVC	FOCPG		Factory setting: 0
mode
	Settings	0 to 1000% (0: disable)
05-15	Detection time of Slip Deviation				Unit: 0.1
Control	VFPG	SVC	FOCPG		Factory setting: 1.0
mode
	Settings	0.0 to 10.0 sec
05-16	Over Slip Treatment
Control	VFPG	SVC	FOCPG		Factory setting: 0
mode
	Settings	0		Warn and keep operation
		1		Warn and ramp to stop
		2		Warn and coast to stop

Pr.05-14 to Pr.05-16 are used to set allowable slip level/time and over slip treatment when the drive is running.

05-17	Hunting Gain		Unit: 1
Control	VF	VFPG SVC	Factory setting: 2000
mode
	Settings	0 to 10000 (0: disable)

The motor will have current wave motion in some specific area. It can improve this situation by setting this parameter. (When it is high frequency or run with PG, Pr.05-17 can be set to 0. when the current wave motion happens in the low frequency, please increase Pr.05-17.)

05-18	Accumulative Motor Operation Time (Min.)		Unit: 1
Control	VF	VFPG SVC FOCPG TQCPG	Factory setting: 00
mode
	Settings	00 to1439

4-60 Revision Nov. 2008, VLE1, SW V1.03