Sako SKI600 - Page 92

086
These above function codes are used to
keep the output frequency of VFD away from
resonance frequency of mechanical load.
The set frequency of VFD can be specified
in a jumping mode around some frequency
point as showed in the following 󽗉gure, which
means the VFD frequency will never stay in
hopping frequency range, but the decelerating
process will pass this range.
F1.25
Hopping freq. 1
0.00 ～ upper limit freq. 0.00
F1.26
Hopping freq. 1 range
0.00 ～ upper limit freq. 0.00
F1.27
Hopping freq. 2
0.00 ～ upper limit freq. 0.00
F1.28
Hopping freq. 2 range
0.00 ～ upper limit freq. 0.00
F1.29
Hopping freq. 3
0.00 ～ upper limit freq. 0.00
F1.30
Hopping freq. 3 range
0.00 ～ upper limit freq. 0.00
Fig. F1-6 Hopping Frequency
0: run at lower limit frequency
VFD runs at lower limit frequency when
set frequency is lower than lower limit
frequency setting value (F0.17).
1: run at zero frequency after delay time
When set frequency is lower than lower limit
(F0.17), after delay time (F1.32), the VFD will
run at zero frequency.
2: stop running after delay time
When set frequency is lower than lower limit
(F0.17), after delay time (F1.32), the VFD will
stop running.
F1.31
Action when set freq. is lower than
lower limit freq.
0～2 0
For details check F1.31 parameter description.
F1.32
Delay time of stopping when
frequency is lower than lower limit
0.0 ～ 3600.0s 10.0
This parameter is the percentage of rated
current of motor.
F1.33
zero frequency brake current
0.0 ～ 150.0% 0.0
Fig. F1-7 FWD/REV run dead band time
The waiting time VFD transit from forward
running to reverse running or the other way
around is as t1 showed in the following 󽗉gure.
It is also related to F1.35 setting.
F1.34
FWD/REV transition time
0.0 ～ 100.0s 0.0
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4.2 Detailed Function Description