Alpha 6000S series User Manual page 150

linear interpolation if the frequency is out range of 5Hz to 50Hz. The setting value is made by the
percentage of motor rated voltage.

In the energy saving control mode, the optimum voltage is calculated according to load power, and the voltage
is supplied to the load. However, the set parameter may vary because of temperature variations or using
various manufacturers' motors; therefore, the optimum voltage may not be supplied in some cases.
Automatic fine-tuning control voltage maintains highly efficient operation.
P9.15 Time of average power
Notes:

Preset the time of average power calculating in energy-saving control mode. The setting range of P9.15 is
25ms×(1~200).
P9.16 AVR function
0: Disabled
2: Disabled in decelerating process
Notes:

AVR means automatic output voltage regulation. When AVR function is invalid, the output voltage will
fluctuate when the power supply voltage fluctuates. When it is valid, the output voltage would not fluctuate
as the input voltage. The output voltage will keep constant within the inverter output capacity.
P9.17 Over modulation enable
0: ineffective; the overmodulation function is
not started
Notes:

When the over modulation function is enabled, the inverter voltage output capacity can be improved. However,
if the output voltage is too high, the output current harmonics will increase.
P9.18 Drop control (load distribution)
Notes:

The function is applicable on the occasion where many frequency inverters drive the same load. By setting the
function, power can be distributed evenly when many frequency inverters drive the same load.

When the load current of a frequency inverter is >50%, the inverter will reduce the output frequency
appropriately automatically according to parameters set with the function to discharge certain load. Once the
load current <=50%, stop reducing the frequency. If the load current is larger than 50% all the time, the
output frequency should be reduced to the setting value of –P9.18.
149
Figure. 5-9-5 Energy saving voltage lower limit
Setting range: 1~200×(25ms) [5]
Setting range: 0~2 [2]
1: Enabled always
Setting range: 0.1 [0]
1: effective; the overmodulation function is started
Setting range: 0.00~10.00Hz [0.00Hz]
Chapter 5 Detailed Function Introductions