Hitachi SJ700-4000HFU2 Instruction Manual page 88

Chapter 4
(3) Free V/f characteristic setting
The free V/f characteristic setting function allows you to set an arbitrary V/f characteristic by specifying
the voltages and frequencies (b100 to b113) for the seven points on the V/f characteristic curve.
The free V/f frequencies (1 to 7) set by this function must always be in the collating sequence of
"1 ≤ 2 ≤ 3 ≤ 4 ≤ 5 ≤ 6 ≤ 7".
Since all free V/f frequencies are set to 0 Hz as default (factory setting), specify their arbitrary values
(begin setting with free-setting V/f frequency (7)). (The inverter cannot operate with the free V/f characteristic
in the factory setting.)
Enabling the free V/f characteristic setting function disables the torque boost selection (A041/A241),
base frequency setting (A003/A203/A303), and maximum frequency setting (A004/A204/A304).
(The inverter assumes the value of free-setting V/f frequency (7) as the maximum frequency.)
Item
Free-setting V/f frequency (7)
Free-setting V/f frequency (6)
Free-setting V/f frequency (5)
Free-setting V/f frequency (4)
Free-setting V/f frequency (3)
Free-setting V/f frequency (2)
Free-setting V/f frequency (1)
Free-setting V/f voltage (7)
Free-setting V/f voltage (6)
Free-setting V/f voltage (5)
Free-setting V/f voltage (4)
Free-setting V/f voltage (3)
Free-setting V/f voltage (2)
Free-setting V/f voltage (1)
(Example)
Output voltage (V)
*1 Even if 800 V is set as a free-setting V/f voltage (1 to 7), the inverter output voltage cannot exceed the inverter
input voltage or that specified by the AVR voltage select.
Carefully note that selecting an inappropriate control system (V/f characteristic) may result in overcurrent during
motor acceleration or deceleration or vibration of the motor or other machine driven by the inverter.
Output voltage (V)
Function code
b112
b110 0. to free-setting V/f frequency (7) (Hz)
b108 0. to free-setting V/f frequency (6) (Hz)
b106 0. to free-setting V/f frequency (5) (Hz)
b104 0. to free-setting V/f frequency (4) (Hz)
b102 0. to free-setting V/f frequency (3) (Hz)
b100 0. to free-setting V/f frequency (2) (Hz)
b113
b111
b109
b107
b105
b103
b101
V7
V6
V5
V4
V1
V2,V3
f1 f2
0
V7
V6
0 f6
4-17
Explanation of Functions
Data
0.to 400.(Hz)
0.0 to 800.0(V)
f3 f4 f5 f6 f7
Voltage that can be output by the
inverter or that was specified by
the AVR voltage select
f7
Output frequency (Hz)
Description
Setting of the output
frequency at each
breakpoint of the V/f
characteristic curve
Setting of the output
voltage at each
breakpoint of the V/f
characteristic curve (*1)
Output frequency (Hz)