SINAMICS G120 Control Units CU240B-2/CU240E-2
List Manual (LH11), 01/2016, A5E33839529
357
2 Parameters
2.2 List of parameters
Description: Display and connector output for the torque of the friction characteristic dependent on the speed.
Dependency: Refer to: p3842
Description: Setting to activate and de-activate the friction characteristic.
Value: 0: Friction characteristic de-activated
1: Friction characteristic activated
Dependency: Refer to: r3841, p3845
Description: Setting for the friction characteristic record.
After the next switch-on command, the friction characteristic is automatically recorded.
Value: 0: Friction characteristic record de-activated
1: Friction char record activated for all directions
2: Friction char record activated for positive direction
3: Friction char record activated for negative direction
Dependency: When selecting the friction characteristic measurement, the drive data set changeover is suppressed.
For linear drives (refer to r0108 bit 12) it is not permissible to carry out the friction characteristic measurement for
mechanical systems that limit travel.
Danger: For drives with a mechanical system that limit the distance moved, it must be ensured that during recording, the
friction characteristic is not reached. If this is not the case, then it is not permissible that the measurement is carried
out.
Notice: To permanently accept the determined settings they must be saved in a non-volatile fashion (p0971, p0977).
Note: When the friction characteristic record is active, it is not possible to save the parameters (p0971, p0977).
When the friction characteristic record is active (p3845 > 0), it is not possible to change p3820 ... p3829, p3830 ...
p3839 and p3842.
When recording the friction characteristic, in addition to the friction, the motor losses are also determined (e.g. iron
losses, eddy current losses and re-magnetizing losses). A differentiation is not made between these individual loss
components. We recommend that a motor temperature sensor is used because torque deviations can also be
emulated/mapped on the characteristic due to the thermal influence.
03 Friction characteristic record aborted Yes No -
08 Friction characteristic positive direction Yes No -
r3841 CO: Friction characteristic output / Frict outp
Access level: 2 Calculated: - Data type: FloatingPoint32
Can be changed: - Scaling: p2003 Dyn. index: -
Unit group: 7_1 Unit selection: p0505 Func. diagram: 7010
Min Max Factory setting
- [Nm] - [Nm] - [Nm]
p3842 Friction characteristic activation / Frict act
Access level: 2 Calculated: - Data type: Integer16
Can be changed: T Scaling: - Dyn. index: -
Unit group: - Unit selection: - Func. diagram: 7010
Min Max Factory setting
0 1 0
p3845 Friction characteristic record activation / Frict rec act
Access level: 2 Calculated: - Data type: Integer16
Can be changed: T Scaling: - Dyn. index: -
Unit group: - Unit selection: - Func. diagram: 7010
Min Max Factory setting
0 3 0
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