Closed-Loop Torque Control - Siemens SINAMICS S150 NEMA Operating Instructions Manual

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Closed-loop torque control

For speed control without encoder (p1300 = 20) or speed control with encoder (p1300 = 21),

a changeover can be made to torque control (following drive) using BICO parameter p1501.

A changeover 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 for torque and

speed control. This particular feature with the supplementary torque setpoint allows a

precontrol torque to be applied for speed control.

No interconnection to fixed torque setpoints

For safety reasons, connecting to fixed torque setpoints is presently not possible.

Regenerative energy without feedback capability

If energy is regenerated and cannot be injected back into the line supply, then a Braking

Module with connected braking resistor must be used.

Enclosed Drives

Operating Instructions, 12/2018, A5E36652151A

Closed-loop speed/torque control

Setpoint channel and closed-loop control

7.4 Vector speed/torque control with/without an encoder