Maximum Output Frequency (Fmax); Maximum Voltage Frequency (Fbase); Maximum Output Voltage (Vmax); Mid-Point Frequency (Fmid) - Delta VFD-B User Manual

Chapter 5 Parameters|VFD-B Series
Group 1: Basic Parameters

Maximum Output Frequency (Fmax)

01 - 00
Settings
This parameter determines the AC motor drive's Maximum Output Frequency. All the AC
motor drive frequency command sources (analog inputs 0 to +10V, 4 to 20mA and -10V to
+10V) are scaled to correspond to the output frequency range.
01 - 01

Maximum Voltage Frequency (Fbase)

Settings
This value should be set according to the rated frequency of the motor as indicated on the
motor nameplate. Maximum Voltage Frequency determines the v/f curve ratio. For example, if
the drive is rated for 460 VAC output and the Maximum Voltage Frequency is set to 60Hz, the
drive will maintain a constant ratio of 7.66 V/Hz (460V/60Hz=7.66V/Hz). This parameter value
must be equal to or greater than the Mid-Point Frequency (Pr.01-03).
01 - 02

Maximum Output Voltage (Vmax)

Settings 230V series 0.1 to 255.0V
This parameter determines the Maximum Output Voltage of the AC motor drive. The Maximum
Output Voltage setting must be smaller than or equal to the rated voltage of the motor as
indicated on the motor nameplate. This parameter value must be equal to or greater than the
Mid-Point Voltage (Pr.01-04).
01 - 03

Mid-Point Frequency (Fmid)

Settings
This parameter sets the Mid-Point Frequency of the V/f curve. With this setting, the V/f ratio
between Minimum Frequency and Mid-Point frequency can be determined. This parameter
must be equal to or greater than Minimum Output Frequency (Pr.01-05) and equal to or less
than Maximum Voltage Frequency (Pr.01-01).
5-28
50.00 to 400.00 Hz
0.10 to 400.00Hz
460V series 0.1 to 510.0V
575V series 0.1 to 637.0V
0.10 to 400.00Hz
Factory Setting: 60.00
Factory Setting: 60.00
Factory Setting: 220.0
Factory Setting: 440.0
Factory Setting: 575.0
Factory Setting: 0.50
Revision July 2008, BE16, SW V4.08 & V5.00
Unit: 0.01
Unit: 0.01
Unit: 0.1
Unit: 0.01