Siemens SINAMICS G120X - Accelerating Torque Smoothing Time Constant; M_Accel T_Smooth; CO: Accelerating Torque; M_Accel; CO: Torque Limit Upper; M_Max Upper; CO: Torque Setpoint before Supplementary Torque; M_Set Bef. M_Suppl

WARNING
The acceleration precontrol r1518 is kept at the old value if the ramp-function generator tracking (r1199.5) is active or
the ramp-function generator output is set (r1199.3). This is used to avoid torque peaks. Depending on the application,
it may therefore be necessary to disable the ramp-function generator tracking (p1145 = 0) or the acceleration
precontrol (p1496 = 0).
The acceleration precontrol is set to zero, if the Vdc control is active (r0056.14/15).
Note
The parameter is set to 100% by the rotating measurement (refer to p1960).
The acceleration precontrol may not be used if the speed setpoint manifests significant ripple (e.g. analog setpoint) and
the rounding-off in the speed ramp-function generator is disabled.
We also recommend that the precontrol mode is not used if there is gearbox backlash.
r1508 CO: Torque setpoint before supplementary torque / M_set bef. M_suppl
Access level: 2 Calculated: - Data type: FloatingPoint32
Can be changed: - Scaling: p2003 Dynamic index: -
Unit group: 7_1 Unit selection: p0505 Function diagram: 6030, 6060,
6722
Min:
- [Nm]
Max:
- [Nm]
Factory setting:
- [Nm]
Description: Displays the torque setpoint before entering the supplementary torque.
For closed-loop speed control, r1508 corresponds to the speed controller output.
p1517[0...n] Accelerating torque smoothing time constant / M_accel T_smooth
Access level: 4 Calculated: - Data type: FloatingPoint32
Can be changed: T, U Scaling: - Dynamic index: DDS, p0180
Unit group: - Unit selection: - Function diagram: 6060
Min:
0.00 [ms]
Max:
100.00 [ms]
Factory setting:
4.00 [ms]
Description: Sets the smoothing time constant of the accelerating torque.
Note
The acceleration precontrol is inhibited if the smoothing is set to the maximum value.
r1518[0...1] CO: Accelerating torque / M_accel
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: - Scaling: p2003 Dynamic index: -
Unit group: 7_1 Unit selection: p0505 Function diagram: 6060
Min:
- [Nm]
Max:
- [Nm]
Factory setting:
- [Nm]
Description: Displays the accelerating torque for precontrol of the speed controller.
Index: [0] = Unsmoothed
[1] = Smoothed
Dependency: See also: p0341, p0342, p1496
p1520[0...n] CO: Torque limit upper / M_max upper
Access level: 2 Calculated:
CALC_MOD_LIM_REF
Data type: FloatingPoint32
Can be changed: T, U Scaling: p2003 Dynamic index: DDS, p0180
Unit group: 7_1 Unit selection: p0505 Function diagram: 6020, 6630
Min:
-1000000.00 [Nm]
Max:
20000000.00 [Nm]
Factory setting:
0.00 [Nm]
Parameters
7.2 Parameter list
SINAMICS G120X converter
684 Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC