Chapter 5 Parameters|VFD-S Series
Revision August 2008, SE09, SW V2.61 5-61
8-15 Automatic Voltage Regulation (AVR)
Factory Setting: d0
Settings d0 AVR function enabled
d1 AVR function disabled
d2 AVR function disabled when deceleration
AVR function automatically regulates the AC drive output voltage to the Maximum Output
Voltage (Pr.1-02). For instance, if Pr.1-02 is set at 200 VAC and the input voltage is at 200V
to 264VAC, then the Maximum Output Voltage will automatically be reduced to a maximum of
200 VAC.
Without AVR function, the Maximum Output Voltage may vary between 180V to 264VAC, due
to the input voltage varying between 180V to 264 VAC.
Selecting program value d2 enables the AVR function and also disables the AVR function
during deceleration. This offers a quicker deceleration.
8-16
Software Brake Level
Unit: 1
Settings 230V series: d350 to d450V Factory Setting: d380
460V series: d700to d900V Factory Setting: d760
During deceleration, the DC-bus voltage will increase due to motor regeneration. When DC
bus voltage level exceeds the Software Brake Level, the DC brake output pins (B1, B2) will be
activated.
8-17
Lower Bound of DC Brake Start-up Frequency
Unit: 0.1
Settings d0.0 to d400 Hz Factory Setting: d0.0
The setting frequency is lower than Pr.8-17, the DC Brake will not be activated when stops.
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