N: Special Adjustment; N1: Hunting Prevention; N3: High Slip Braking (Hsb) And Overexcitation Braking - YASKAWA P1000 Quick Start Manual

B.8 n: Special Adjustment
The n parameters adjust more advanced performance characteristics such as Hunting Prevention, High Slip Braking, and
Overexcitation Braking.

n1: Hunting Prevention

u
No.
(Addr. Name
Hex)
n1-01 Hunting Prevention
(580) Selection
n1-02 Hunting Prevention Gain
(581) Setting
n1-03 Hunting Prevention Time
(582) Constant
n1-05 Hunting Prevention Gain
(530) while in Reverse
<1> Default setting is dependent on parameter o2-04, Drive Model Selection.

n3: High Slip Braking (HSB) and Overexcitation Braking

u
No.
(Addr. Name
Hex)
High-Slip Braking
n3-01
Deceleration Frequency
(588)
Width
n3-02 High-Slip Braking Current
(589) Limit
n3-03 High-Slip Braking Dwell
(58A) Time at Stop
n3-04 High-Slip Braking Overload
(58B) Time
n3-13 Overexcitation Deceleration
(531) Gain
High Frequency Injection
n3-14
during Overexcitation
(532)
Deceleration
n3-21 High-Slip Suppression
(579) Current Level
n3-23 Overexcitation Operation
(57B) Selection
<1> Default setting is dependent on parameter L8-38, Frequency Reduction Selection.
YASKAWA ELECTRIC TOEP YAIP1U 01B YASKAWA AC Drive - P1000 Quick Start Guide
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 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. Default:
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.
0: Enabled in both directions
1: Enabled only when rotating forward
2: Enabled only when in reverse
Description
Description
B.8 n: Special Adjustment
Values Page
Default: 1
–
Range: 0, 1
Default: 1.00
Min.: 0.00 –
Max.: 2.50
<1>
Default:
–
Min.: 0 ms
Max.: 500 ms
Default: 0.00
Min.: 0.00 –
Max.: 2.50
Values Page
Default: 5%
Min.: 1 –
Max.: 20
<1>
–
Min.: 100%
Max.: 200%
Default: 1.0 s
Min.: 0.0 –
Max.: 10.0
Default: 40 s
Min.: 30 –
Max.: 1200
Default: 1.10
Min.: 1.00 –
Max.: 1.40
Default: 0
–
Range: 0, 1
Default: 100%
Min.: 0 –
Max.: 150
Default: 0
–
Range: 0 to 2
217
B