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KFU 2-/4-
121
The synchronization changes the parameterized starting behavior of the selected
configuration. First, the start command activates the search run in order to determine
the rotary frequency of the drive. In operation modes 1 to 5, the
Current / Rated mo-
tor current
647
is used for synchronization as a percentage of the
Rated current
371
.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
647 Current / Rated Motor Current
1.00 %
100.00 %
70.00 %
The sensor-less control is extended for the search run by a PI-Controller, which regu-
lates the parameterized
Current / Rated Motor Current
647
. The proportional and
integrating part of the current controller can be set via the parameters
Amplifica-
tion
648
and
Integral Time
649
. The control functions can be deactivated by setting
the parameters to 0.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
648
Amplification
0.00
10.00
1.00
649 Integral time
0 ms
1000 ms
20 ms
If the
Operation mode Synchronization
645
parameter was set to operation mode 1 to
5 (search run), the search run is not started before the
Demagnetization time
633
has
elapsed.
If synchronization to the drive mechanism is not possible, the
Braking current
631
is
impressed into the motor in operation modes 1 to 5 for the duration of the
Braking
time
after search run
646
. The impress of the direct current set in the parameters of
the direct current brake leads to a heating of the motor and should only be done for a
short period in internally ventilated motors.
Parameter
Settings
No.
Description
Min.
Max.
Fact. sett.
646 Brak. time after search run
0.0 s
200.0 s
10.0 s
11.6 Positioning
Positioning is done in operation mode "Reference positioning" via the definition of the
positioning distance or in operation mode "Axle positioning" via the definition of the
position angle.
Reference positioning uses a digital reference signal from a selectable signal source
for positioning the drive independent of the speed.
Axle positioning uses a digital reference signal from a speed sensor.
The function "Reference positioning" is available in configurations 110, 210, 410 and
510 and is activated by selecting operation mode 1 for parameter
Operation
mode
458
.