Procedure
1. Set p3845 = 1: The converter accelerates the motor successively in both directions of rotation
and averages the measurement results of the positive and negative directions.
2. Switch on the motor (ON/OFF1 = 1).
3. The converter accelerates the motor.
During measurement, the converter signals the alarm A07961.
When the converter has determined all the intermediate points of the friction characteristic
without fault code F07963, the converter stops the motor.
You have recorded the friction characteristic.
❒
Adding friction characteristic for the torque setpoint
If you enable the friction characteristic (p3842 = 1), the converter adds the output of the friction
characteristic r3841 to the torque setpoint.
Parameters
Parameter Description Setting
p3820[0...n]
…
p3839[0...n]
Intermediate points of the friction
characteristic [rpm; Nm]
The friction characteristic is dened by 10 value
pairs.
r3840.0...8 CO/BO: Friction characteristic sta‐
tus word
Display and BICO output for the status word of the
friction characteristic.
.00 1 signal: Friction characteristic OK
.01 1 signal: Determination of the friction charac‐
teristic is active
.02 1 signal: Determination of the friction charac‐
teristic is complete
.03 1 signal: Determination of the friction charac‐
teristic has been aborted
.08 1 signal: Friction characteristic positive direc‐
tion
r3841 CO: Friction characteristic output
[Nm]
Display and connector output for the torque of the
friction characteristic dependent on the speed.
p3842 Friction characteristic activation Setting to activate and deactivate the friction char‐
acteristic.
0: Friction characteristic deactivated (factory set‐
ting)
1: Friction characteristic activated
Advanced commissioning
7.20Motor control
SINAMICS G115D Wall Mounted distributed drive
298 Operating Instructions, 07/2023, FW V4.7 SP14, A5E52808211A AA
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