Torque Control - Siemens SINAMICS S120 Function Manual

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.
Figure 4-12
Drive functions
Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5
T
i
p1503[C]
(0)
p1501
r1406.12
p1511[C]
(0)
p1512[C]
(0)
p1513[C]
(0)
Closed-loop speed/torque control
r1547[0]
0
-
1
r1547[1]
1
r1407.2
Vector control
4.7 Torque control
r1538
r0079
r1539
r1515
137