Efficient Networks Siemens Sinamics S120 - Manual (Page 129)

Vector control
4.7 Torque control
Drive Functions
Function Manual, (FH1), 07/2007 Edition, 6SL3097-2AB00-0BP4
129
Overview of key parameters (see SINAMICS S List Manual)
● p1488[0...n] Droop input source
● p1489[0...n] Droop feedback scaling
● p1492[0...n] BI: Droop feedback enable
● r1482 CO: Speed controller I torque output
● r1490 CO: Droop feedback speed reduction
4.7 Torque control
With sensorless speed control SLVC (p1300 = 20) or speed control with sensor VC (p1300 =
21), a switchover can be made to torque control (slave drive) via BICO parameter p1501. A
switchover cannot be made between speed and torque control if torque control is selected
directly with p1300 = 22 or 23. The torque setpoint and/or supplementary setpoint can be
entered using BICO parameter p1503 (CI: torque setpoint) or p1511 (CI: supplementary
torque setpoint). The supplementary torque is active both with torque and speed control.
This particular feature with the supplementary torque setpoint allows a pre-control torque to
be applied for speed control.
Note
For safety reasons, connecting to fixed torque setpoints is currently not possible.
Regenerative energy may accumulate, and this must be either fed back into the supply
system or converted into heat using a braking resistor.