Siemens Sinamics CU240D-2 DP Operating Instructions Manual page 208

Advanced commissioning
6.15 Motor control
Procedure
1. Set P3845 = 1: The inverter 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 inverter accelerates the motor.
During measurement, the inverter signals the alarm A07961.
When the inverter has determined all the intermediate points of the friction characteristic
without fault code F07963, the inverter 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 inverter adds the output of the friction
characteristic r3841 to the torque setpoint.
Parameter
Parameter
p3820 ...
p2839
r3840
r3841
p3842
p3845
p3846
p3847
Further information on this topic is provided in the List Manual.
206
Explanation
Intermediate points of the friction characteristic [rpm; Nm]
Friction characteristic status word
.00 1 signal: Friction characteristic OK
.01 1 signal: Determination of the friction characteristic is active
.02 1 signal: Determination of the friction characteristic is complete
.03 1 signal: Determination of the friction characteristic has been aborted
.08 1 signal: Friction characteristic positive direction
Friction characteristic, output [Nm]
Activate friction characteristic
0: Friction characteristic deactivated
1: Friction characteristic activated
Activate friction characteristic plot (factory setting: 0)
0: Friction characteristic plot deactivated
1: Friction characteristic plot activated, both directions
2: Friction characteristic plot activated, positive direction
3: Friction characteristic plot activated, negative direction
Friction characteristic plot ramp-up/ramp-down time (factory setting: 10 s)
Ramp-up/ramp-down time for automatic plotting of the friction characteristic.
Friction characteristic plot warm-up period (factory setting: 0 s)
At the start of automatic plotting, the inverter accelerates the motor up to the speed =
p3829 und keeps the speed constant for this time.
Converter with the control units CU240D-2
Operating Instructions, 04/2018, FW V4.9 SP10, A5E34262100B AF