Sako SKI600, Manual

Page: 133 / 180

127
Notice
When the network voltage is low, the
output torque of motor will decrease. In
conditions of constant power load and
constant torque load, the low network
voltage will increase the input an output
current of VFD, so as to lower the reliability
of VFD operation. Therefore the VFD
need to run in derated capacity when the
network voltage is quite low for long term.
Notice
In the normal VF mode, FA.06 is used for
amplitude limiting during accelerating
or constant speed running; in Vector VF
mode, FA.06 is used for amplitude limiting
during accelerating, and no such limit
process during constant speed running; in
vector mode, the amplitude limit during
constant speed running is only related to
F4.20 ～ F4.21.
This parameter defines the action voltage of
stall over voltage protection.
FA.04
Overvoltage limit level
220V: 350 ～ 390V 370V
380V: 550 ～ 780V 660V
Depending
on model
During decelerating, the larger of this value,
the stronger of the overvoltage suppressing
ability.
FA.05
voltage limit factor in decelerating
0 ～ 100 0: overvoltage
stall protection invalid
Depending
on model
0: limited by current limiting threshold of
FA.06.
When output frequency is within 50Hz,
FA.06 is used for amplitude limiting.
1: limited based on corrected current from
FA.06
When output frequency is above 50Hz,
amplitude limiting is processed based on
corrected current from FA.06.
FA.07
current limiting in field weakening
region
0 ～ 1
0
During accelerating, the larger of this value,
the stronger of the overcurrent suppressing
ability.
FA.08
Current limit factor in accelerating
0 ～ 100 0: current limit
of accelerating invalid
Depending
on model
0: disabled
1: enabled
FA.09
Current limit in constant speed
running
0 ～ 1
1
This parameter defines auto current limiting
threshold, and the set value is the percentage
relative to the rated current of VFD.
FA.06
Current limit threshold (only valid in
V/F mode)
G tyep: 80％～ 200％
*VFD rated current 160%
P tyep: 80％～ 200％
*VFD rated current 120%
Depending
on model
4.2 Detailed Function Description