Basic Parameter Settings - Hitachi X200 Series Instruction Manual

3 12
3 12

Basic Parameter Settings

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).
V
100%
0
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
Inverter for Multiple Motors " on page
Func.
Code
A003 Base frequency setting
F-BASE
A203 Base frequency setting,
2nd motor
2F-BASE
A004 Maximum frequency setting
F-MAX
A204 Maximum frequency setting,
2nd motor
2F-MAX
A003 A004
Base Maximum
Frequency Frequency
"A" Function
Name /
SRW Display
Settable from 30 Hz to the
maximum frequency(A004)
00060Hz
Settable from 30 Hz to the 2nd
maximum frequency(A204)
00060Hz
Settable from the base
frequency to 400 Hz
00060Hz
Settable from the 2nd base
frequency to 400 Hz
00060Hz
V
100%
f
0
4-58.
Description
A003
A004
f
Base Frequency =
Maximum Frequency
" Configuring the
Defaults
Run
Mode -FE -FU
Units
Edit
(EU) (USA)
50.0 60.0
50.0 60.0
50.0 60.0
50.0 60.0
Hz
Hz
Hz
Hz