Siemens SINAMICS S120 Function Manual page 97

Variants of torque limitation
The following variants are available:
● No settings entered:
● Fixed limits are required for the torque:
● Dynamic limits are required for the torque:
● A torque offset can be parameterized.
● In addition, the power limits can be parameterized separately for motor and regenerative
Uncontrolled accelerating drives
Negative values at r1534 or positive values at r1535 represent a minimum torque for the
other torque directions and can cause the drives to rotate if no counteractive load torque is
generated (see function diagram 5630 in the SINAMICS S120/S150 List Manual).
Example: Torque limits with or without offset
The signals selected via p1522 and p1523 include the torque limits parameterized via p1520
and p1521.
Figure 3-7
The hatched area in the example shows the permissible torque range.
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
The application does not require any additional restrictions to the torque limits.
The fixed upper and lower limits or alternatively the fixed motor and regenerative limits
can be specified separately by different sources.
– The dynamic upper and lower limit or, alternatively, the dynamic motor and
regenerative limit can be specified separately by different sources.
– Parameters are used to select the source of the current limit.
mode.
WARNING
Example: Torque limits with or without offset
Servo control
3.5 Torque setpoint limitation
95