Energy-Saving Mode - Siemens SINAMICS G120 CU230P-2 HVAC Operating Instructions Manual

7.9.14

Energy-saving mode

The energy-saving mode is mainly used for pumps and fans. Typical applications include
pressure and temperature controls.
In the energy-saving mode, the inverter stops and starts the motor depending on the system
conditions. The energy-saving mode can be activated via the technology controller (without
external commands via terminals or bus interface) and via an external setpoint input.
The energy-saving mode offers the advantages of energy saving, lowering mechanical wear
and reduced noise.
Note
In the energy-saving mode, if the setpoint is to be entered from the motorized potentiometer
or from the motorized potentiometer of the technology controller, you must set p1030.4 or
p2230.4 = 1.
NOTICE
After the inverter has been powered up, the motor goes into the energy-saving mode if the
energy-saving mode start speed has still not been reached after the highest value from
p1120 (ramp-up time), p2391 (energy-saving mode delay time) and 20 s have expired.
Operating principle
The energy-saving mode starts as soon as the motor speed drops below the energy-saving
mode start speed. However, the motor is only switched off after an adjustable time has
expired. If, during this time, the speed setpoint increases above the energy-saving mode
start speed due to pressure or temperature changes, the energy-saving mode is exited and
the inverter goes into normal operation.
Frequency inverters with Control Units CU230P-2 HVAC, CU230P-2 DP, CU230P-2 CAN
Operating Instructions, 01/2011, FW 4.4, A5E02430659B AD
7.9 Application-specific functions
Functions
269