N: Special Adjustment; N: Special Adjustment; N1: Hunting Prevention; N3: High Slip Braking (Hsb) And Overexcitation Braking - YASKAWA Z1000 User Manual

B.9 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. Name
Hex)
n1-01 Hunting Prevention
(580) Selection
n1-02 Hunting Prevention
(581) Gain Setting
n1-03 Hunting Prevention
(582) Time Constant
n1-05 Hunting Prevention
(530) Gain while in Reverse
<1> Default setting is dependent on parameter o2-04, Drive Model Selection.
u

n3: High Slip Braking (HSB) and Overexcitation Braking

No.
(Addr. Name
Hex)
High-Slip Braking
n3-01
Deceleration Frequency
(588)
Width
n3-02 High-Slip Braking
(589) Current Limit
n3-03 High-Slip Braking
(58A) Dwell Time at Stop
n3-04 High-Slip Braking
(58B) Overload Time
n3-13 Overexcitation
(531) Deceleration Gain
n3-21 High-Slip Suppression
(579) Current Level
n3-23 Overexcitation
(57B) Operation Selection
<1> Default setting is dependent on parameter L8-38, Frequency Reduction Selection.
YASKAWA ELECTRIC TOEP C710616 45F YASKAWA AC Drive – Z1000 User Manual
LCD Display
Hunt Prev Select 0: Disabled
0: Disabled 1: Enabled
1: Enabled
If the motor vibrates while lightly loaded, increase the gain by
Hunt Prev Gain 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.
Hunt Prev Time
Sets the gain used for Hunting Prevention. If set to 0, the gain
Hprev Gain @Rev set to n1-02 is used for operation in reverse.
LCD Display
Sets the output frequency reduction step width for when the
drive stops the motor using HSB. Set as a percentage of the
HSB DecStepWidth
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.
HSB Current Lim
Sets the time the drive will run with minimum frequency
(E1-09) at the end of deceleration.
HSB DwelTim@Stp
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 OL Time
HSB stop. This parameter does not typically require
adjustment.
Sets the gain applied to the V/f pattern during Overexcitation
Hflux Brake Gain Deceleration (L3-04 = 4).
Sets output current level at which the drive will start reducing
the overexcitation gain in order to prevent a too high motor slip
Hflux I Supp Lvl
during Overexcitation Deceleration. Set as a percentage of the
drive rated current.
Hflux Brake Sel 0: Enabled in both directions
0: Enabled-Both Dir 1: Enabled in forward direction
1: Enabled-Fwd only 2: Enabled in reverse direction
2: Enabled-Rev only
B.9 n: Special Adjustment
Description
Description
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>
Default:
–
Min.: 0%
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: 100%
Min.: 0 –
Max.: 150
Default: 0
–
Range: 0 to 2
B
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