Siemens SINAMICS S120 Function Manual page 615

Principle of operation of the two feedback loops
The following diagrams show the principle of operation of the two combined APC feedback
loops:
● Block diagram
Figure 8-44
● Load frequency response without APC
Figure 8-45
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
8.14 Advanced Position Control (including Active Vibration Suppression)
Control loop with two APC feedbacks
Sample load frequency response
Function modules
615