Advanced Settings - Siemens SINAMICS G120D Operating Instructions Manual

With control units cu250d-2
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Advanced commissioning
7.5 Motor control
7.5.2.4

Advanced settings

K
- and T
adaptation
p
n
The K
commissioning, the inverter optimizes the speed controller using the "rotating measurement"
function. If you have performed the rotating measurement, then the K
been set.
You can find additional information in the List Manual, function block diagram 6050.
Droop
The droop function reduces the speed setpoint as a function of the torque setpoint.
Figure 7-19
The droop function ensures even torque distribution between two or more mechanically
coupled drives. Load distribution using the droop function also masters soft mechanical
couplings or a permanent speed difference as a result of slip.
Preconditions for using the droop function
● All coupled drives must be operated in vector control, with or without an encoder.
● Only a one common ramp-function generator may be used for mechanically coupled
drives.
Par.
r1482
p1488
p1489
r1490
p1492
You can find additional information in the List Manual, function block diagram 6030.
152
- and T
adaptation suppresses possible speed controller oscillations. During basic
p
n
Effect of droop in the speed controller
Explanation
Speed controller I torque output
Droop input source (factory setting: 0)
0: Droop feedback not connected
1: Droop from the torque setpoint
2: Droop from the speed control output
3: Droop from the integral output, speed controller
Droop feedback scaling (factory setting: 0,05)
A value of 0.05 means: At the rated motor torque, the inverter reduces the speed by 5% of
the rated motor speed.
Droop feedback speed reduction
Droop feedback enable (factory setting: 0)
Converter with control units CU250D-2
Operating Instructions, 04/2015, FW V4.7.3, A5E34261542B AB
- and T
adaptation has
p
n

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