Important Notes For Parameterization - Siemens SINAMICS S120 Function Manual

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Important notes for parameterization

The function always requires a direct measuring system. If an axis is equipped with a

measuring system (encoder 2 or encoder 3), then this can be selected using p3701. BICO sink

p3749 can be activated by setting p3700.9 = 1. The load speed actual value can now be freely

interconnected, e.g. from a master axis. Scaling can be set using p3748.

An external acceleration sensor can be used as direct measuring system. This must be

integrated in the system (e.g. via TM31) and wired with BICO sink p3750. To eliminate low-

frequency disturbances from the measurement signal, a highpass filter can be parameterized

using p3751. The acceleration sensor for APC is activated with p3700.1 = 1.

There are two feedback branches for this function. Each branch is parameterized using a gain

factor (p3761 and p3766). Frequently, practical values for the gain lie in a range between 1 ms

and 10 ms; however, this depends on the mechanical system of the axis.

Filters can be activated for both branches (see function diagram and Chapter "Additional

information (Page 579)").

For applications where a high contour precision is required (in the mold making area) we

recommend that p3700.3 is set = 1. As a consequence, the setpoint motion of the axis within

APC is better taken into account.

We recommend that p3700.4 = 1 is used.

Drive functions

Function Manual, 06/2019, 6SL3097-5AB00-0BP2

9.14 Advanced Position Control (including Active Vibration Suppression)

Load frequency response with APC: 1 feedback closed

Load frequency response with APC: 2 feedbacks closed

Function modules