Chapter 5 Parameters_VFD-B Series
5-30
Revision 10/2005, BE13, SW V4.08
Group 1: Basic Parameters
01 - 00
Maximum Output Frequency (Fmax) Unit: 0.01
Settings 50.00 to 400.00 Hz Factory Setting: 60.00
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) Unit: 0.01
Settings 0.10 to 400.00Hz Factory Setting: 60.00
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) Unit: 0.1
Settings 230V series 0.1 to 255.0V Factory Setting: 220.0
460V series 0.1 to 510.0V Factory Setting: 440.0
575V series 0.1 to 637.0V Factory Setting: 575.0
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) Unit: 0.01
Settings 0.10 to 400.00Hz Factory Setting: 0.50
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).
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