Siemens SINAMICS G115D Operating Instructions Manual page 267

When droop is active, the ramp-function generators of all of the coupled drives must be set to
have identical ramp-up and ramp-down times as well as rounding-off.
Parameter
r1482
p1488[0...n]
p1489[0...n]
r1490
p1492[0...n]
You can find additional information in the List Manual, function block diagram 6030.
Special settings for a pulling load
For a pulling load, e.g. a hoisting gear, a permanent force is exerted on the motor, even
when the motor is stationary.
If you use encoderless vector control with a pulling load, the following settings are required:
• Set the following parameters:
• When opening the motor holding brake, enter a speed setpoint > 0.
For speed setpoint = 0, and with the motor holding brake open, the load drops because
the asynchronous motor rotates with the slip frequency as a result of the pulling load.
• Set the ramp-up and ramp-down times ≤ 10 s in the ramp-function generator.
SINAMICS G115D distributed drive
Operating Instructions, 12/2020, FW V4.7 SP13, A5E48681219B-002
Description
CO: Speed controller I torque
output [Nm]
Droop input source
Droop feedback scaling
CO: Droop feedback speed reduc-
tion [rpm]
BI: Droop feedback enable
Parameter Description
p1750[0...n] Motor model configuration
p1610[0...n] Static torque setpoint (encoder-
less) [%]
Advanced commissioning
Setting
Display and connector output for the torque set-
point at the output of the I speed controller.
Sets the source for droop feedback.
0: Droop feedback not connected (factory setting)
1: Droop from the torque setpoint
2: Droop from the speed control output
3:
Droop from the integral output, speed controller
Sets the scaling for the droop feedback
A value of 0.05 means: At the rated motor torque,
the converter reduces the speed by 5% of the
rated motor speed.
Factory setting: 0.05
Displays the output signal of the droop calculation.
Enables the droop to be applied to the
speed/velocity setpoint.
Factory setting: 0
Setting
Sets the configuration for the motor model.
Bit 07 = 1: Use speed switchover limits that are
less sensitive to external effects.
Sets the static torque setpoint for sensorless
vector control in the low speed range.
Set a value which is higher than the maximum
load torque that occurs.
Factory setting: 50
6.18 Motor control
265