Dwell Operation - LG SV-iC5 Series Instruction Manual

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.
10.5

Dwell operation

Group LED Display
Function
H 7
group 2
H 8
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.
Where,
Frequency
t
FX
RX
P5 (3-Wire)
Parameter Name
[Dwell frequency]
[Dwell time]
×
 
rpm P
= −
 
f f
s r
 
120
f
= Rated slip frequency
s
f
r = Rated frequency
rpm
= Motor nameplate RPM
P
= Number of Motor poles
P1 FX : I20 = 0
P2 RX : I21 = 1
P5 3-Wire : I24 = 17
CM
Set Min/Max
value
-
-
10-5
10. Advanced functions
Factory
Range Defaults
0/400 5.0
0/10 0.0
SV-iC5
Unit
Hz
sec