Siemens SINAMICS S120 Function Manual page 295

Parame‐ Meaning
ter values
2 Parabolic characteris‐
tic
3 Programmable char‐
acteristic
4 Linear characteristic
and ECO
5 Precise frequency
drives
6 Precise frequency
drives with flux cur‐
rent control (FCC)
Drive functions
Function Manual, 06/2019, 6SL3097-5AB00-0BP2
Characteristic that takes into account the
motor torque curve (e.g. fan, pump).
● Quadratic characteristic (f
characteristic)
● Energy saving because the low voltage
also results in small currents and losses
Characteristic that takes into account mo‐
tor/machine torque curve (e.g. synchro‐
nous motor).
Characteristic, see parameter 0 and Eco mode at a constant operating point.
● In the ECO mode, the efficiency at a constant operating point is optimized. This
optimization is only effective in steady-state operation and when the ramp-function
generator is not bypassed.
● You must activate slip compensation and set the scaling of the slip compensation
(p1335) so that the slip is completely compensated (generally, 100%).
Characteristic that takes into account the technological particularity of an application
(e.g. textile applications):
● Whereby the current limitation (Imax controller) only affects the output voltage and
not the output frequency
● By disabling slip compensation
Characteristic that takes into account the technological particularity of an application
(e.g. textile applications):
● Whereby the current limitation (Imax controller) only affects the output voltage and
not the output frequency
● By disabling slip compensation
Voltage losses in the stator resistance for static/dynamic loads are also compensated
(Flux Current Control FCC). This function is required for small motors, as, in comparison
to large motors, they have a relatively high stator resistance.
Application / property
2
U/f control (vector control)
293