Siemens SINAMICS S120 - Torque Limiting

Vector control
5.8 Torque limiting
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
237
5.8
Torque limiting
Description
The torque limiting value specifies the maximum permissible torque. Different limits can be
parameterized for motoring and generating operation.
Figure 5-14 Torque limit
● p0640[0...n] Current limit
● p1520[0...n] CO: Torque limit, upper/motoring
● p1521[0...n] CO: Torque limit, lower/regenerative
● p1522[0...n] CI: Torque limit, upper/motoring
● p1523[0...n] CI: Torque limit, lower/regenerative
● p1524[0...n] CO: Torque limit, upper/motoring, scaling
● p1525[0...n] CO: Torque limit, lower/regenerative scaling
● p1530[0...n] Motor mode power limit
● p1531[0...n] Regenerative mode power limit
The currently active torque limit values are displayed in the following parameters:
● r0067 CO: Output current maximum
● r1526 Torque limit, upper/motoring without offset
● r1527 Torque limit, lower/regenerative without offset
All of the following limits apply to the torque setpoint, which is present either at the speed
controller output in the case of speed control, or at the torque input in the case of torque
control. The minimum/maximum value of the different limits is used in each case. This
minimum/maximum is cyclically calculated and displayed in the following parameters:
● r1538 CO: Upper effective torque limit
● r1539 CO: Lower effective torque limit