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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.
Parameters
Number
p1300
r1348
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
Name
Open-loop/closed-loop control operating mode
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
Factory setting
20: Speed control
(encoderless)
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437
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