Siemens SINAMICS G120X - ECO Mode; ECO Mode Activation; ECO Mode Deactivation

6.10.2 ECO mode
Overview
ECO mode works by slightly changing the output voltage either up or down in order to find the
minimum input power. It is suitable for applications with a low dynamic response and constant
speed setpoint, and allows energy savings of up to 40% in the ideal case.
Precondition
The ECO mode can only work under conditions when the load characteristic is low dynamic.
The ECO mode works only in U/f control mode.
In the ECO mode, active slip compensation is necessary. Set the slip compensation (p1335) to
100 %. In the event of minor fluctuations in the setpoint, you have to raise the ramp-function
generator tolerance using p1148.
Function description
ECO mode activation:
When the speed setpoint is reached and remains unchanged for 5 s, the converter
automatically reduces its output voltage to optimize the motor's operating point.
ECO mode deactivation:
ECO mode is deactivated when the setpoint changes or if the converter’s DC-link voltage is too
high or too low.
(&2OLQHDU(&2TXDGUDWLF
(&2
IDFWRU
(&2
IDFWRU
99
II






Parameters
Number Name Factory setting
p1300 Open-loop/closed-loop control operating mode 20: Speed control
(encoderless)
r1348 CO: U/f control Eco factor actual value --
For more information about the parameters, see Chapter "Parameters (Page 467)".
$
%
&
Advanced commissioning
6.10 Energy saving
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC 437