Hitachi CP-X200 instruction manual Basic Parameter Settings, Base, 2F-BASE, Max

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Basic Parameter Settings

&RQ¿JXULQJ'ULYH	Parameters	Parameters
	Drive
	Configuring

These settings affect the most fundamental behavior of the inverter – the outputs to the motor. The frequency of the inverter’s AC output determines the motor speed. You may select from three different sources for the reference speed. During application development you may prefer using the potentiometer, but you may switch to an external source (control terminal setting) in the finished application, for example.

The base frequency and maximum frequency settings interact according to the graph below (left). The inverter output operation follows the constant V/f curve until it reaches the full-scale output voltage at the base frequency. This initial straight line is the constant-torque part of the operating characteristic. The horizontal line over to the maximum frequency serves to let the motor run faster, but at a reduced torque. This is the constant-power operating range. If you want the motor to output constant torque over its entire operating range (limited to the motor nameplate voltage and frequency rating), then set the base frequency and maximum frequency equal as shown (below right).

				A003
V	A003	A004	V	A004
100%			100%

0	f	f
	Maximum	0
Base		Base Frequency =
Frequency	Frequency	Maximum Frequency

NOTE: The “2nd motor” settings in the table in this chapter store an alternate set of parameters for a second motor. The inverter can use the 1st set or 2nd set of parameters to generate the output frequency to the motor. See “Configuring the Inverter for Multiple Motors” on page 4-58.

	“A” Function		Run		Defaults
Func.	Name /	Description	Mode -FE -FU			Units
Code	SRW Display		Edit	(EU)	(USA)

A003	Base frequency setting		Settable from 30 Hz to the	50.0	60.0	Hz
			maximum frequency(A004)
	F-BASE	00060Hz
A203	Base frequency setting,		Settable from 30 Hz to the 2nd	50.0	60.0	Hz
	2nd motor		maximum frequency(A204)
	2F-BASE	00060Hz
A004	Maximum frequency setting		Settable from the base	50.0	60.0	Hz
			frequency to 400 Hz
	F-MAX	00060Hz
A204	Maximum frequency setting,		Settable from the 2nd base	50.0	60.0	Hz
	2nd motor		frequency to 400 Hz

2F-MAX 00060Hz