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10. Advanced functions
10-5 SV-iC5
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 Parameter Name
Set
value
Min/Max
Range
Factory
Defaults
Unit
H 7 [Dwell frequency] -
0/400 5.0 Hz
Function
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.
×
−=
120
Prpm
ff
rs
Where,
s
f
= Rated slip frequency
r
f
= Rated frequency
rpm
= Motor nameplate RPM
P
= Number of Motor poles
P1
P2
P5
CM
FX : I20 = 0
RX : I21 = 1
3-Wire : I24 = 17
FX
RX
Frequency
P5 (3-Wire)
t