LG Electronics SV-iC5 Series manual Advanced functions, s = r −  rpm ⋅ P  f f  120 

10. Advanced functions

P1	FX : I20	= 0
P2	RX : I21 = 1
P5	3-Wire :	I24 = 17
CM

Frequency

t

FX

RX

P5 (3-Wire)

If both 3-Wire and Up-Down operation are selected, the former will be ignored.

The bandwidth of pulse (t) should be above 50msec.

Speed search operation is valid even in the case of LVT (low voltage trip) following instant power failure.

10.5Dwell operation

Group	LED Display	Parameter Name	Set		Min/Max		Factory	Unit
			value		Range		Defaults
Function	H 7	[Dwell frequency]	-	0/400		5.0		Hz
group 2
	H 8	[Dwell time]	-	0/10		0.0		sec

In this setting, motor begins to accelerate after dwell operation is executed for dwell time at the dwell frequency.

It is mainly used to release mechanical brake in elevators after operating at dwell frequency.

Dwell frequency : This function is used to output torque in an intended direction. It is useful in hoisting applications to get enough torque before releasing a mechanical brake. Rated Slip frequency is calculated by the formula shown below.

s = r −  rpm ⋅ P  f f  120 

Where, fs = Rated slip frequency

fr = Rated frequency

rpm = Motor nameplate RPM

P= Number of Motor poles

10-5 SV-iC5