Delta Electronics VFD-M manual Pr.03, Pr.04, greater than setting of Mid-Point Frequency Pr.06

							Chapter 4 Parameters
	Hz					Hz
Freq.						Freq.
Motor						Motor
Speed						Speed
					Time					Time
				Stops according					Free running
				to deceleration					to stop
Operation		ON		time			ON OFF
				OFF
command
			Ramp					Coast

Note: The motor stop method is usually determined by the application or system requirements.

Pr.03	Maximum Output Frequency	Unit: 0.1Hz
	Settings 50.00 to 400.0 Hz	Factory Setting: 60.00

This parameter determines the AC drive’s Maximum Output Frequency. All the AC drive analog inputs (0 to +10V, 4 to 20mA) are scaled to correspond to the output frequency range.

Pr.04	Maximum Voltage Frequency (Base Frequency)	Unit: 0.1Hz
	Settings 10.00 to 400.0Hz	Factory Setting: 60.00

This parameter should be set according to the rated frequency as indicated in the motor nameplate. Pr.04 and Pr.03 determine the volts per hertz 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. Setting of Pr.04 must be equal to or

greater than setting of Mid-Point Frequency (Pr.06).

Pr.05 Maximum Output Voltage (Vmax)

Settings 115V/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 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. Setting of Pr.05 must be equal to or greater than setting

of Mid-Point Voltage (Pr.07).

Revision May 2008, ME14, SW V3.04 4-21