N: Special Adjustment - YASKAWA A1000 Series Quick Start Manual

B Parameter List

◆ 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. Name
n1-01 Hunting Prevention Selection
Hunting Prevention Gain
n1-02
Setting
Hunting Prevention Time
n1-03
Constant
Hunting Prevention Gain
n1-05
while in Reverse
<6> Default setting value varies by the drive model (o2-04).
n2: Speed Feedback Detection Control (AFR) Tuning
■
No. Name
Speed Feedback Detection
n2-01
Control (AFR) Gain
Speed Feedback Detection
n2-02 Control (AFR) Time
Constant 1
Speed Feedback Detection
n2-03 Control (AFR) Time
Constant 2
n3: High Slip Braking (HSB) and Overexcitation Braking
■
No. Name
High Slip Braking
n3-01 Deceleration Frequency
Width
High Slip Braking Current
n3-02
Limit
High Slip Braking Dwell
n3-03
Time at Stop
High-Slip Braking Overload
n3-04
Time
Overexcitation Deceleration
n3-13
Gain
High Frequency Injection
n3-14 during Overexcitation
Deceleration
High-Slip Suppression
n3-21
Current Level
168
0: Disabled
1: Enabled
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.
Sets the time constant used for Hunting Prevention.
Sets the gain used for Hunting Prevention. If set to 0, the gain set to n1-02 is
used for operation in reverse.
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.
Sets the time constant used for speed feedback detection control (AFR).
Sets the AFR time constant to be used during Speed Search and during regen.
Sets the output frequency reduction step width for when the drive stops the
motor using HSB. Set as a percentage of the maximum output frequency.
Increase this setting if overvoltage occurs during HSB.
Sets the current limit during HSB as a percentage of the motor rated current.
Sets the time the drive will run with minimum frequency (E1-09) at the end of
deceleration.
If this time is set too low, the machine inertia can cause the motor to rotate
slightly after HSB.
Sets the time required for an HSB overload fault (oL7) to occur when the drive
output frequency does not change during an HSB stop. This parameter does not
typically require adjustment.
Sets the gain applied to the V/f pattern during Overexcitation Deceleration (L3-
04 = 4).
0: Disabled
1: Enabled
Sets output current level at which the drive will start reducing the overexcitation
gain in order to prevent a too high motor slip during Overexcitation
Deceleration. Set as a percentage of the drive rated current.
YASKAWA ELECTRIC TOEP C710616 21C YASKAWA AC Drive - A1000 Quick Start Guide
Description
Description
Description
Setting
Default: 1
Min: 0
Max: 1
Default: 1.00
Min: 0.00
Max: 2.50
Default:
<6>
Min: 0 ms
Max: 500 ms
Default: 0.00
Min: 0.00
Max: 2.50
Setting
Default: 1.00
Min: 0.00
Max: 10.00
Default: 50 ms
Min: 0 ms
Max: 2000 ms
Default: 750 ms
Min: 0 ms
Max: 2000 ms
Setting
Default: 5%
Min: 1%
Max: 20%
Default:
<35>
Min: 100%
Max: 200%
Default: 1.0 s
Min: 0.0 s
Max: 10.0 s
Default: 40 s
Min: 30 s
Max: 1200 s
Default: 1.10
Min: 1.00
Max: 1.40
Default: 0
Min: 0
Max: 1
Default: 100%
Min: 0%
Max: 150%