Hitachi L100 Jump Frequencies –

3–17

L100 Inverter

Jump Frequencies – Some motors or machines exhibit resonances at particular speed(s), which can be destructive for prolonged running at those speeds. The inverter has up to three jump frequencies as shown in the graph. The hysteresis around the jump frequencies causes the inverter output to skip around the sensitive frequency values

Output

frequency

						A 68
A 67
	Jump frequencies					A 68
				A 66
A 65					Hysteresis values
				A 66
A 63		A 64
0		A 64
			Frequency command

		“A” Function		Run		Defaults
									Configuring ParametersDrive
Func.	Name /		Description	Mode	–FE	–FU	–FR	Units
				Edit
Code	SRW Display				(CE)	(UL)	(Jpn)
A_63,	Jump (center)		Up to 3 output frequencies can	✘	0.0	0.0	0.0	Hz
A_65,	frequency setting		be defined for the output to		0.0	0.0	0.0
A_67			jump past to avoid motor		0.0	0.0	0.0
	JUMP F1	000.0Hz
	JUMP F2	000.0Hz	resonances (center frequency)
			Range is 0.0 to 360.0 Hz
	JUMP F3	000.0Hz
A_64,	Jump (hysteresis)		Defines the distance from the	✘	0.5	0.5	0.5	Hz
A_66,	frequency width setting		center frequency at which the		0.5	0.5	0.5
A_68			jump around occurs		0.5	0.5	0.5
	JUMP W1	00.50Hz
	JUMP W2	00.50Hz	Range is 0.0 to 10.0 Hz
	JUMP W3	00.50Hz