A.11 n: Special Adjustment
The n parameters adjust more advanced performance characteristics such as Hunting Prevention, speed feedback detection,
High Slip Braking, and Online Tuning for motor line-to-line resistance.
u
n1: Hunting Prevention
No.
(Addr.
Hex)
Name
Description
Values
Page
n1-01
(580)
Hunting Prevention
Selection
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLV
V/f
V/f w PG
0: Disabled
1: Enabled
Default: 1
Range: 0, 1
n1-02
(581)
Hunting Prevention Gain
Setting
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLV
V/f
V/f w PG
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
(582)
Hunting Prevention Time
Constant
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLV
V/f
V/f w PG
Sets the time constant used for Hunting Prevention.
Default:
Min.: 0 ms
Max.: 500 ms
n1-05
(530)
Hunting Prevention Gain
while in Reverse
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLV
V/f
V/f w PG
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
<1> Default setting is dependent on parameter o2-04, Drive Model Selection.
u
n2: Speed Feedback Detection Control (AFR) Tuning
No.
(Addr.
Hex)
Name
Description
Values
Page
n2-01
(584)
Speed Feedback Detection
Control (AFR) Gain
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLV
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
(585)
Speed Feedback Detection
Control (AFR) Time
Constant 1
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLV
OLV
Sets the time constant used for speed feedback detection control (AFR).
Default: 50 ms
Min.: 0
Max.: 2000
n2-03
(586)
Speed Feedback Detection
Control (AFR) Time
Constant 2
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLV
OLV
Sets the AFR time constant to be used during Speed Search and during regen.
Default: 750 ms
Min.: 0
Max.: 2000
u
n3: High Slip Braking (HSB) and Overexcitation Braking
No.
(Addr.
Hex)
Name
Description
Values
Page
n3-13
(531)
Overexcitation Deceleration
Gain
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLV
V/f
V/f w PG
OLV
CLV
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLV
V/f
V/f w PG
OLV
CLV
Sets the gain applied to the V/f pattern during Overexcitation Deceleration
(L3-04 = 4).
Default: 1.10
Min.: 1.00
Max.: 1.40
A.11 n: Special Adjustment
290
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual