B.10 n: Special Adjustments
The n parameters adjust more advanced performance characteristics such as Hunting Prevention, speed feedback detection,
and Online Tuning for motor line-to-line resistance.
u
n1: Hunting Prevention
No.
(Addr.
Hex)
Name
LCD Display
Description
Values
Page
n1-01
(0580)
Hunting Prevention
Selection
Hunt Prev Select
0: Disabled
1: Enabled
0: Disabled
1: Enabled
Default: 1
Range: 0, 1
–
n1-02
(0581)
Hunting Prevention Gain
Setting
Hunt Prev Gain
If the motor vibrates while lightly loaded, increase the gain by
0.1 until vibration ceases. If the motor stalls, decrease the gain
by 0.1 until the stalling ceases.
Default: 1.00
Min.: 0.00
Max.: 2.50
–
n1-03
(0582)
Hunting Prevention
Time Constant
Hunt Prev Time
Sets the time constant used for Hunting Prevention.
Default:
Min.: 0 ms
Max.: 500 ms
–
n1-05
(0530)
Hunting Prevention Gain
while in Reverse
Hprev Gain @Rev
Sets the gain used for Hunting Prevention. If set to 0, the gain
set to n1-02 is used for operation in reverse.
Default: 0.00
Min.: 0.00
Max.: 2.50
–
n1-12
(0B1B)
Vibration Suppression
Time Constant
VibSuppress-Time
There is normally no need to change this parameter from the
default value.
Default: 0 ms
Min.: 0
Max.: 1000
–
<1> Default setting is determined by parameter o2-04, Drive Model Selection.
u
n2: Speed Feedback Detection Control (AFR) Tuning
No.
(Addr.
Hex)
Name
LCD Display
Description
Values
Page
n2-01
(0584)
Speed Feedback
Detection Control
(AFR) Gain
AFR Gain
OLV
OLV
OLV
OLV
Sets the internal speed feedback detection control gain in the
automatic frequency regulator (AFR).
If hunting occurs, increase the set value. If response is low,
decrease the set value.
Default: 1.00
Min.: 0.00
Max.: 10.00
–
n2-02
(0585)
Speed Feedback
Detection Control
(AFR) Time Constant 1
AFR Time
OLV
OLV
OLV
OLV
Sets the time constant used for speed feedback detection control
(AFR).
Default: 50 ms
Min.: 0
Max.: 2000
–
u
n3: Overexcitation Braking
No.
(Addr.
Hex)
Name
LCD Display
Description
Values
Page
n3-13
(0531)
Overexcitation
Deceleration Gain
Hflux Brake Gain
Sets the gain applied to the V/f pattern during Overexcitation
Deceleration (L3-04 = 4).
Default: 1.10
Min.: 1.00
Max.: 2.00
–
u
n6: Online Tuning
No.
(Addr.
Hex)
Name
LCD Display
Description
Values
Page
n6-01
(0570)
Online Tuning
Selection
Online Tune Sel
OLV
OLV
OLV
OLV
0: Disabled
1: Line-to-line resistance tuning
2: Voltage correction. Setting not possible when Energy Saving
is enabled (b8-01).
Default: 0
Range: 0 to 2
–
n6-05
(05C7) Online Tuning Gain
R1 Comp Gain
OLV
OLV
OLV
OLV
Decrease this setting for motors with a relatively large rotor
time constant.
Default: 1.0
Min.: 0.1
Max.: 50.0
–
B.10 n: Special Adjustments
YASKAWA TOEPYAIUPW01A YASKAWA AC Drive - U1000 iQpump Matrix Drive User Manual
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B
Parameter List