Hitachi SJ7002 Series Instruction Manual page 101

Sj7002 series
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Vector Control with Encoder Feedback – This method of torque control uses an encoder as a
motor shaft position sensor. Accurate position feedback allows the inverter to close the velocity
loop and provide very accurate speed control, even with variations in motor loads. To use
encoder feedback you will need to add an SJ–FB Encoder Feedback Card in the inverter's
expansion bay. Please refer to
manual for details. The following table shows the methods of torque control selection.
Func.
Name/
Code
Description
A041
Torque boost method selection
A241
Torque boost method selection, 2nd
motor
A042
Manual torque boost value
Can boost starting torque between 0 and 20% above
normal V/f curve
A242
Manual torque boost value, 2nd motor
Can boost starting torque between 0 and 20% above
normal V/f curve
A342
Manual torque boost value, 3rd motor
Can boost starting torque between 0 and 20% above
normal V/f curve
A043
Manual torque boost frequency adjustment
Sets the frequency of the V/f breakpoint A in graph (top of
previous page) for torque boost
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
A343
Manual torque boost frequency adjustment, 3rd motor
Sets the frequency of the V/f breakpoint A in graph (top of
previous page) for torque boost
A044
V/f characteristic curve selection,
1st motor
Torque control modes
A244
V/f characteristic curve selection,
2nd motor
Torque control modes
"Expansion Cards" on page 5–5
Keypad
Range and Settings
SRW
OPE
00
MANUAL
Manual torque boost
0 1
AUTO
Automatic torque boost
00
MANUAL
Manual torque boost
0 1
AUTO
Automatic torque boost
0.0 to 20.0 (%)
0.0 to 20.0 (%)
0.0 to 20.0 (%)
0.0 to 50.0 (%)
0.0 to 50.0 (%)
0.0 to 50.0 (%)
00
VC
V/f constant torque
0 1
VP
V/f variable torque
02
FREE-V/F
V/f free-setting curve
03
Sensorless vector SLV
SLV
04
0SLV
0Hz domain SLV
05
V2
Vector control with encoder
feedback
00
VC
V/f constant torque
0 1
VP
V/f variable torque
02
FREE-V/F
V/f free-setting curve
03
SLV
Sensorless vector SLV
04
0SLV
0Hz domain SLV
SJ700
Inverter
2
in this manual or the SJ–FB
Defaults
Run
Mode
FEF2
FUF2
FF2
Edit
FE2
FU2
F2
Lo Hi
(EU)
(USA)
(Jpn)
✘ ✘
00
00
00
✘ ✘
00
00
00
✔ ✔
1.0
1.0
1.0
✔ ✔
1.0
1.0
1.0
✔ ✔
1.0
1.0
1.0
✔ ✔
5.0
5.0
5.0
✔ ✔
5.0
5.0
5.0
✔ ✔
5.0
5.0
5.0
✘ ✘
00
00
00
✘ ✘
00
00
00
3–17

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