Delta Electronics VFD-VL manual 01-09, 01-10, Output Frequency Upper Limit Unit, 01-11

		Voltage								Chapter 4 Parameters
				Output Frequency					Output Frequency
	1st Output
							01-10		Upper Limit
	Voltage Setting 1		01-11 Lower Limit
		01-02			Frequency output
	2nd Output				ranges limitation
	Voltage Setting 1
		01-04									Regular V/f Curve
	3rd Output										Special V/f Curve
	Voltage Setting 1
		01-06
	4th Output
	Voltage Setting 1										Frequency
		01-08	01-07	01-09 01-05		01-03		01-01
										01-00
		4th Freq.			3rd Freq.	2nd Freq.		1st Freq.		Maximum Output
			Start Freq.							Frequency
					V/f Curve
01-09	Start Frequency										Unit: 0.01
Control	VF	VFPG	SVC	FOCPG							Factory setting: 0.50
mode
	Settings	0.00~120.00Hz

To distinguish which frequency should be start frequency, it needs to compare the value of min. output frequency and start frequency. The larger value will be start frequency.

When min. output frequency > start frequency When start frequency > min. output frequency

min. output	start frequency
frequency
start frequency	min. output
	frequency

01-10	Output Frequency Upper Limit				Unit: 0.01
Control	VF	VFPG	SVC	FOCPG FOCPM	Factory setting: 120.00
mode
	Settings	0.00~120.00Hz
01-11	Output Frequency Lower Limit				Unit: 0.01
Control	VF	VFPG	SVC	FOCPG FOCPM	Factory setting: 0.00
mode
	Settings	0.00~120.00Hz

The upper/lower output frequency setting is used to limit the actual output frequency. If the frequency setting is lower than the start-up frequency, it will run with zero speed. If the frequency setting is higher than the upper limit, it will runs with the upper limit frequency. If output frequency lower limit > output frequency upper limit, this function is invalid.

Revision Nov. 2008, VLE1, SW V1.03 4-31