Siemens Sinamics S110 Function Manual page 150

Drive functions
7.1 Servo control
Optimizing the speed controller
The speed controller is set in accordance with the motor moment of inertia when the motor is
configured for the first time. The calculated proportional gain is set to approximately 30% of
the maximum possible gain in order to minimize vibrations when the controller is mounted on
the mechanical system of the machine for the first time.
The integral time of the speed controller is always preset to 10 ms.
The following optimization measures are necessary in order to achieve the full dynamic
response:
● Increase the proportional gain Kp_n (p1460)
● Change the integral action time Tn_n (p1462)
Automatic controller setting of the speed controller (frequency response analysis) in STARTER
● The automatic speed controller setting has the following features:
● The automatic controller settings can be verified with the measuring functions.
The "automatic controller setting" parameterization screen form is selected using the
following symbol in the toolbar of the STARTER commissioning tool:
Figure 7-16
Example of measuring the speed controller frequency response
By measuring the speed controller frequency response and the control system, critical
resonance frequencies can, if necessary, be determined at the stability limit of the speed
control loop and dampened using one or more current setpoint filters. This normally enables
the proportional gain to be increased (e.g. Kp_n = 3* default value).
After the Kp_n value has been set, the ideal integral action time Tn_n (e.g. reduced from 10
ms to 5 ms) can be determined.
148
– Section identification using FFT analysis
– Automatic setting of filters in the current setpoint arm, e.g. for damping resonances
– Automatic setting of the controller (gain factor Kp, integral time Tn)
STARTER symbol for "automatic controller setting"
Function Manual, 01/2011, 6SL3097-4AB10-0BP3
Function Manual