Hitachi L300P - Manual (Page 85)

“A” Group: Standard Functions
Configur
ing Dr
iv
e
P
a
ra
meters
3–16
The V/f free-setting endpoint f7/V7
parameters must stay within the more
basic inverter limits in order for the
specified free-setting characteristic
curve to be achieved. For example, the
inverter cannot output a higher voltage
than the input voltage or the AVR
setting voltage (Automatic Voltage
Regulation), set by parameter A082.
The graph to the right shows how the
inverter input voltage would clip (limit)
the characteristic curve if exceeded.
The following table shows the methods of torque control selection.
0
Output voltage
Output
frequency
f6 f7
V6
V7
Hz
(even)
B101 to
B113
(odd)
Voltage to output or AVR voltage
B100 to B112
“A” Function Run
Mode
Edit
Lo Hi
Defaults
Units SRW Display
Func.
Code
Name Description
–FE2
(CE)
–FU2
(UL)
–FR
(Jpn)
A041 Torque boost method
selection
Two options:
00 Manual torque boost
01 Automatic torque boost
✘ ✘
00 00 00 — >A041 V-Boost
Mode MANUAL
A241 Torque boost method
selection, 2nd motor
Two options (for 2nd
motor):
00 Manual torque boost
01 Automatic torque boost ✘ ✘ 00 00 00 — >A241 2V-Boost
Mode MANUAL
A042 Manual torque boost
value
Can boost starting torque
between 0 and 20% above
normal V/f curve, from 0 to
1/2 base frequency
✔ ✔
1.0 1.0 1.0 — >A042 V-Boost
Code 01.0%
A242 Manual torque boost
value, 2nd motor
Can boost starting torque
between 0 and 20% above
normal V/f curve, from 0 to
1/2 base frequency
✔ ✔
1.0 1.0 1.0 — >A242 2V-Boost
Code 01.0%
A043 Manual torque boost
frequency adjustment
Sets the frequency of the
V/f breakpoint A in graph
(top of previous page) for
torque boost ✔ ✔ 5.0 5.0 5.0 % >A043 V-Boost
F 05.0%
A243 Manual torque boost
frequency adjustment,
2nd motor
Sets the frequency of the
V/f breakpoint A in graph
(top of previous page) for
torque boost
✔ ✔
5.0 5.0 5.0 % >A243 2V-Boost
F 05.0%
A044 V/f characteristic curve
selection, 1st motor
Three torque control modes:
00 V/f constant torque
01 V/f variable torque
02 V/f free-setting curve
✘ ✘
00 01 00 — >A044 Control
1st VC
A244 V/f characteristic curve
selection, 2nd motor
Three torque control modes:
00 V/f constant torque
01 V/f variable torque
02 V/f free-setting curve
✘ ✘
00 01 00 — >A244 2Control
2nd VC
A045 V/f gain setting Sets voltage gain of the
inverter from 20 to 100% ✔ ✔ 100. 100. 100. % >A045 V-Gain
Gain 100%