N: Special Adjustment - YASKAWA A1000 Technical Manual

No. (Addr.) Name
L8-95 Average LSo Frequency at Low
(77FH) Speed
<3> Parameter setting value is not reset to the default value when the drive is initialized.
<6> Default setting value varies by the drive model (o2-04).
<10> Default setting is determined by the control mode (A1-02).
<16> Default setting is determined by the control mode (A1-02) and the drive model (o2-04).

L9: Drive Protection 2
No. (Addr.) Name
L9-03 Carrier Frequency Reduction
(819H) Level Selection
 n: Special Adjustment
The n parameters are used to adjust more advanced performance characteristics such as Hunting Prevention, speed
feedback detection, High Slip Braking, and Online Tuning for motor line-to-line resistance.

n1: Hunting Prevention
No. (Addr.) Name
n1-01
Hunting Prevention Selection
(580H)
n1-02
Hunting Prevention Gain Setting
(581H)
n1-03
Hunting Prevention Time Constant
(582H)
n1-05 Hunting Prevention Gain while in
(530H) Reverse
<6> Default setting value varies by the drive model (o2-04).

n2: Speed Feedback Detection Control (AFR) Tuning
No. (Addr.) Name
n2-01 Speed Feedback Detection Control
(584H) (AFR) Gain
n2-02 Speed Feedback Detection Control
(585H) (AFR) Time Constant 1
n2-03 Speed Feedback Detection Control
(586H) (AFR) Time Constant 2
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the average number of times LSo can occur at low speed.
V/f V/f w/PG
OLV/PM AOLV/PM
There is normally no need to change this parameter from the default value.
Selects the level to start the reduction of the frequency or to clear the current frequency level for
the automatic reduction of the carrier frequency.
0: Reduces the carrier frequency based on the drive's rated current that is not derated.
1: Reduces the carrier frequency based on the drive's rated current that is derated by the carrier
frequency and the temperature selected for C6-02.
Note: This parameter is not available with models CIMR-A4A0930 and 4A1200.
V/f V/f w/PG
OLV/PM AOLV/PM
0: Disabled
1: Enabled
V/f V/f w/PG
OLV/PM AOLV/PM
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.
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the time constant used for Hunting Prevention.
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the gain used for Hunting Prevention. If set to 0, the gain set to n1-02 is used for operation
in reverse.
V/f V/f w/PG
OLV/PM AOLV/PM
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.
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the time constant used for speed feedback detection control (AFR).
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the AFR time constant to be used during Speed Search and during regen.
Description
OLV CLV
CLV/PM
Description
OLV CLV
CLV/PM
Description
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
Description
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV
CLV
CLV/PM
B.3 Parameter Table
Setting Page
Default: 10 times
Min: 1 time 301
Max: 50 times
Setting Page
Default: 0
Min: 0 301
Max: 1
Setting Page
Default: 1
Min: 0 302
Max: 1
Default: 1.00
Min: 0.00 302
Max: 2.50

Default:
<6>
Min: 0 ms 302
Max: 500 ms
Default: 0.00
Min: 0.00 302
Max: 2.50
Setting Page
Default: 1.00
Min: 0.00 303
Max: 10.00
Default: 50 ms
Min: 0 ms 303
Max: 2000 ms
Default: 750 ms
Min: 0 ms 303
Max: 2000 ms
501
B