gefran VDI100 Series Instruction Manual page 227

When the output frequency rises above the value set in parameter 11-18 manual energy savings function is
enabled. Setting parameter 11-18 manual energy savings frequency to 0.0 Hz disables the manual energy
savings frequency activation function. Refer to figure 4.4.88 for more information.
Note:
Only use manual energy savings functions in combination with light loads.
Manual energy saving gain (11-12) determines the output voltage of the inverter when manual energy savings
is enabled. Output voltage is percentage gain times the V/f voltage.
Manual energy saving control uses the voltage recovery time (07-23) to change the output voltage
Code Parameter Name / Range
11-19 Automatic energy saving function
0: Automatic energy saving is disabled
1: Automatic energy saving is enabled
11-20 Filter time of automatic energy saving
0~200 msec
11-21 Voltage upper limit of energy saving tuning
0~100%
11-22 Adjustment time of automatic energy saving
0~5000 msec
11-23 Detection level of automatic energy saving
0~100%
11-24 Coefficient of automatic energy saving
0.00~655.35
In the V/f control mode the automatic energy saving (AES) function automatically adjusts the output voltage
and reduces the output current of the inverter to optimize energy savings based on the load.
The output power changes proportional to the motor load. Energy savings is minimal when the load exceeds
70% of the output power and savings become greater when the load decreases.
The parameter of automatic energy saving function has been set at the factory before shipment. In general, it is
no need to adjust. If the motor characteristic has significant difference from the Gefran standard, please refer to
the following commands for adjusting parameters:
Enable Automatic Energy Savings Function
(1) To enable automatic energy saving function set 11-19 to 1.
(2) Filter time of automatic energy saving (11-20)
(3) Commissioning parameter of energy saving (11-21 to 11-22)
In AES mode, the optimum voltage value is calculated based on the load power requirement but is also affect-
ed by motor temperature and motor characteristic.
In certain applications the optimum AES voltage needs to be adjusted in order to achieve optimum energy sav-
ings. Use the following AES parameters for manual adjustment:
11-21: Voltage limit value of AES commissioning operation
VDI100 • Instruction manual
Figure 4.4.88 Manual energy saving operation
RUN Command
OFF
ON
Manual Energy
Saving Command
OFF
Output
Frequency
Output
Voltage
ON
Frequency reference ≥ 11-18
Voltage change rated = 07-23 (Voltage recovery time
V/f pattern (01-02 to 01-09) x 11-12
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