KFU 2-/4-
191
If the mains voltage is restored after the shutdown of the drive but before the under-
voltage switch-off has been reached, the frequency inverter signals a fault. The con-
trol unit displays the fault message "F0702".
If the mains failure without shutdown (
Shutdown threshold
675
= 0 Hz) takes so long
that the frequency has been reduced to 0 Hz, the drive is accelerated to the reference
frequency when the mains supply is restored.
If the mains failure with or without shutdown takes so long that the frequency inverter
shuts off completely (LED's = OFF), the frequency inverter will be in the "Standby"
state when the mains supply is restored. If the inverter is released again, the drive will
start. If the drive is to start automatically after restoration of the mains supply if the
inverter is released permanently,
Operation mode
651
of Auto Start must be switched
on.
Parameter
Settings
No.
Description
KFU
Min.
Max.
Fact. sett.
675
Shutdown
Threshold
0.00 Hz
999.99 Hz
0.00 Hz
2- 225 387.5
365
676 Reference Shutdown Value
4- 425
770
730
The voltage controller uses the limit values of the DC link voltage. The frequency
change necessary for this is parameterized by the generator reference current value
or the ramp. The
Gen. ref. current limit
683
or the ramp
Mains support deceleration
673
defines the maximum deceleration of the drive necessary in order to reach the
voltage value
Reference mains support value
672
. The
Acceleration on mains re-
sumption
674
replaces the set values of the ramp parameters
Acceleration (clock-
wise)
420
or
Acceleration anticlockwise
422
if the figure set in the factory is changed.
The voltage control in a mains failure changes from the frequency limit
Shutdown
threshold
675
from
Reference mains support value
672
to the
Reference shutdown
value
676
.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
683 Gen. ref. current limit
0.0 A
ü
I
FUN
I
FUN
673 Mains support deceleration
0.01 Hz/s
9999.99 Hz/s
50.00 Hz/s
674 Acceleration on mains resumption
0.00 Hz/s
9999.99 Hz/s
0.00 Hz/s
The proportional and integrating part of the current controller can be set via parame-
ters
Amplification
677
and
Integral time
678
. The control functions are deactivated
by setting the parameters to 0. The controllers are P and I controllers in the corre-
sponding settings.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
1
1)
677
Amplification
0.00
30.00
2
2)
8 ms
1)
678 Integral time
0 ms
10000 ms
23 ms
2)
The factory settings depend on the selected configuration and control procedure.
According to the setup of parameter
Configuration
30
there is the following assign-
ment.
1)
Configurations 1xx
2)
Configurations 4xx, 2xx, 5xx
