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Basic Parameter Settings

Configuring Drive Parameters

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 switch 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 (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

0

f

Maximum

Base Frequency =

Base

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 86
Image 86
Hitachi X200 Series instruction manual Basic Parameter Settings, Base, 2F-BASE, Max, 2F-MAX