YASKAWA U1000 - N: Special Adjustments; N1: Hunting Prevention; N2: Speed Feedback Detection Control (AFR) Tuning

B.11 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
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLVV/f V/f w PG
0: Disabled
1: Enabled
Default: 1
Range: 0, 1
334
n1-02
(0581)
Hunting Prevention Gain
Setting
Hunt Prev Gain
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLVV/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
334
n1-03
(0582)
Hunting Prevention
Time Constant
Hunt Prev Time
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLVV/f V/f w PG
Sets the time constant used for Hunting Prevention.
Default:
<1>
Min.: 0 ms
Max.: 500 ms
334
n1-05
(0530)
Hunting Prevention Gain
while in Reverse
Hprev Gain @Rev
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLVV/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
334
n1-09
(0BAD)
<2>
Vibration Suppression
Level
Vib Suppress Lvl
OLV/PMOLV/PM
There is normally no need to change this parameter from the
default value.
Default: 2.00
Min.: 0.00
Max.: 10.00
334
n1-10
(0BAE)
<2>
Suppression Frequency Suppress Frq
OLV/PMOLV/PM
There is normally no need to change this parameter from the
default value.
Default: 10.0 Hz
Min.: 5.0
Max.: 100.0
335
n1-11
(0BAF)
<2>
Suppression Auxiliary
Frequency
Suppress Sub-Frq
OLV/PMOLV/PM
There is normally no need to change this parameter from the
default value.
Default: 20.0 Hz
Min.: 10.0
Max.: 50.0
335
n1-12
(0B1B)
<2>
Vibration Suppression
Time Constant
VibSuppress-Time
All Modes
There is normally no need to change this parameter from the
default value.
Default: 0 ms
Min.: 0
Max.: 1000
335
<1> Default setting is determined by parameter o2-04, Drive Model Selection.
<2> Available in drive software versions PRG: 1017 and later.
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
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLVOLV
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
335
n2-02
(0585)
Speed Feedback
Detection Control
(AFR) Time Constant 1
AFR Time
V/f
OLV/PM
V/f w PG
AOLV/PM
OLV
CLV/PM
CLVOLV
Sets the time constant used for speed feedback detection control
(AFR).
Default: 50 ms
Min.: 0
Max.: 2000
335
B.11 n: Special Adjustments
558
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual