N: Special Adjustment; N: Special Adjustment; N1: Hunting Prevention; N2: Speed Feedback Detection Control (Afr) Tuning - YASKAWA A1000 Series Quick Start Manual

B.9 n: Special Adjustment
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
(0580) Selection
n1-02 Hunting Prevention Gain
(0581) Setting
n1-03 Hunting Prevention
(0582) Time Constant
n1-05 Hunting Prevention Gain
(0530) while in Reverse
<1> Default setting is determined by parameter o2-04, Drive Model Selection.
u

n2: Speed Feedback Detection Control (AFR) Tuning

No.
(Addr. Name
Hex)
Speed Feedback
n2-01
Detection Control (AFR)
(0584)
Gain
Speed Feedback
n2-02
Detection Control (AFR)
(0585)
Time Constant 1
Speed Feedback
n2-03
Detection Control (AFR)
(0586)
Time Constant 2
u

n3: High Slip Braking (HSB) and Overexcitation Braking

No.
(Addr. Name
Hex)
High-Slip Braking
n3-01
Deceleration Frequency
(0588)
Width
n3-02 High-Slip Braking
(0589) Current Limit
n3-03 High-Slip Braking
(058A) Dwell Time at Stop
n3-04 High-Slip Braking
(058B) Overload Time
n3-13 Overexcitation
(0531) Deceleration Gain
308
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 internal speed feedback detection control gain in the
automatic frequency regulator (AFR).
AFR Gain
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 Time (AFR).
Sets the AFR time constant to be used during Speed Search and
AFR Time 2 during regen.
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).
YASKAWA ELECTRIC TOEP C710616 41G YASKAWA AC Drive - A1000 Quick Start Guide
Description
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: 1.00
Min.: 0.00 –
Max.: 10.00
Default: 50 ms
Min.: 0 –
Max.: 2000
Default: 750 ms
Min.: 0 –
Max.: 2000
Values Page
Default: 5%
Min.: 1 –
Max.: 20
<1>
Default:
Min.: 100% –
<1>
Max.:
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