Extended Method: Closed-Loop Controlled Operation Down To 0 Hz - Siemens SINAMICS S120 Function Manual

Vector control
5.2 Vector control without encoder (SLVC)
Enabling controlled operation with test signal
1. Set the required operating mode (p1300[0...n]).
2. Activate the higher-level method with test signal (controlled operation) with p1750.05 = 1.
If required by the system, the message F01040 appears when the power unit is
configured. This warning indicates that a parameter has been changed, which requires
saving the parameters and restarting the system.
5.2.8

Extended method: Closed-loop controlled operation down to 0 Hz

The actual rotor position can be continuously determined down to 0 Hz (standstill). With
Siemens 1FW4 and 1PH8 torque motors, the load can be maintained at standstill or, from
standstill, the motor can accelerate any load up to rated torque.
When the function is activated, at low speeds, additional noise can be heard, depending on
the motor design.
The procedure is suitable for motors with internal magnets.
Figure 5-5 Zero point in closed-loop operation down to zero speed
Note
Only open-loop controlled operation is permitted when using a sine-wave filter.
216
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Drive functions