Sako SKI600, Manual

Page: 90 / 180

084
Fig. F1-4 Stop DC Braking
The setting value of stop DC brake current is
the percentage relative to rated current value
of VFD. When stop brake time is 0.0s, there
would be no DC brake process.
F1.09
Frequency threshold of DC brake
0.00 ～【F0.16】upper limit
freq.
0.00
F1.10
DC brake delay time
0.0 ～ 100.0s
0.0
F1.11
DC brake current
0.0 ～ 150.0％ *rated current
of motor
0.0%
F1.12
DC brake time at stop
0.0: DC brake no action
0.1 ～ 100.0s
0.0
Fig. F1-3 Straight Line and S Curve of Acc./Dec.
Details described in S curve Acc./Dec. item of
F1.05.
F1.06
Time ratio of initial segment in S curve
10.0 ～ 50.0％
20.0%
F1.07
Time ratio of end segment in S curve
10.0 ～ 50.0％
20.0%
0: accelerating stop
When receiving stop command, the VFD
decreases output frequency gradually
according to decelerating time until zero
and then stop. If stop DC brake function
is valid, after reaching the stop DC brake
initial frequency (according to F1.09 set,
F1.08
Stop mode
0 ～ 1
0
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4.2 Detailed Function Description
it may takes a period of stop DC brake
waiting time), the VFD will conduct DC brake
process and then stop.
1: free stop
Upon receiving the stop command, the
VFD stops immediately, and the load stops
according to mechanical inertia.
the accelerating start and speed reaching
period, and decrease start and decreasing
reaching period, set the speed as S curve.
Thus the increasing and decreasing action
become smooth and the impact to load is
decreased. The S curve Acc./Dec. is suitable
for carry or deliver the start and stop of
load, like elevator, conveyor, etc. As showed
in the following figure: t1 is accelerating
time, t2 is decreasing time, ts is time of S
curve initial segment, te is time of S curve
end segment, F1.06=ts/t1, F1.07=te/t2.