Siemens SINAMICS G120XA, Operating Instructions Manual, Page: 525 / 918

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.
p1496[0...n] Acceleration precontrol scaling / a_prectrl scal
CUG120XA_USS
(PM330)
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: T, U Scaling: - Dynamic index: DDS, p0180
Unit group: - Unit selection: - Function diagram: 6020, 6031
Min:
0.0 [%] Max:
10000.0 [%] Factory setting:
100.0 [%]
Description: Sets the scaling for the acceleration precontrol of the speed/velocity controller.
Dependency: See also: p0341, p0342
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.
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.
Parameters
7.3 Parameters
SINAMICS G120XA converter
Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB
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