Siemens SINAMICS S120 Function Manual page 198

Servo control
4.21 Voltage precontrol
4. The result can be improved by compensating the voltage emulation error (only for
synchronous motors).
– To do this, activate function module "Extended torque control (Page 485)" (r0108.1).
– Determine the voltage emulation error with the stationary motor data identification
– Activate the compensation of the voltage emulation error (p1780.8 = 1).
5. If, after reaching the current setpoint, the current actual value dips, correct the current
actual value via p1734 or p1735 (see the subsequent diagram).
Figure 4-32
198
(p1909.14 = 1 and p1910).
Example: Voltage precontrol before optimization (with dip)
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Drive functions