Yaskawa iQpump1000 AC Drive Quick Start - Manual (Page 368)

B.9 n: Special Adjustment
The n parameters adjust more advanced performance characteristics such as Hunting Prevention, High Slip Braking, and
Overexcitation Braking.
u n1: Hunting Prevention
No.
(Addr.
Hex)
Name LCD Display Description Values Page
n1-01
(0580)
Hunting Prevention
Selection
Hunt Prev Select
0: Disabled
1: Enabled
V/f V/f
0: Disabled
1: Enabled
Default: 1
Range: 0, 1
–
n1-02
(0581)
Hunting Prevention
Gain Setting
Hunt Prev Gain
V/f V/f
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.
Default: 1.00
Min.: 0.00
Max.: 2.50
–
n1-03
(0582)
Hunting Prevention
Time Constant
Hunt Prev Time
V/f V/f
Sets the time constant used for Hunting Prevention.
Default: <1>
Min.: 0 ms
Max.: 500 ms
–
n1-05
(0530)
Hunting Prevention
Gain while in Reverse Hprev Gain @Rev
V/f V/f
Sets the gain used for Hunting Prevention. If set to 0, the gain
set to n1-02 is used for operation in reverse.
Default: 0.00
Min.: 0.00
Max.: 2.50
–
<1> Default setting is dependent on parameter o2-04, Drive Model Selection.
u n2: Speed Feedback Detection Control (AFR) Tuning
No.
(Addr.
Hex)
Name LCD Display Description Values Page
n2-01
(0584)
Speed Feedback
Detection Control
(AFR) Gain
AFR Gain
OLV OLV OLV OLV
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.
Default: 1.00
Min.: 0.00
Max.: 10.00
–
n2-02
(0585)
Speed Feedback
Detection Control
(AFR) Time Constant
1
AFR Time
OLV OLV OLV OLV
Sets the time constant used for speed feedback detection control
(AFR).
Default: 50 ms
Min.: 0
Max.: 2000
–
n2-03
(0586)
Speed Feedback
Detection Control
(AFR) Time Constant
2
AFR Time 2
OLV OLV OLV OLV
Sets the AFR time constant to be used during Speed Search and
during regen.
Default: 750 ms
Min.: 0
Max.: 2000
–
u n3: High Slip Braking (HSB) and Overexcitation Braking
No.
(Addr.
Hex)
Name LCD Display Description Values Page
n3-01
(0588)
High-Slip Braking
Deceleration Frequency
Width
HSB DecStepWidth
V/f V/f
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.
Default: 5%
Min.: 1
Max.: 20
–
n3-02
(0589)
High-Slip Braking
Current Limit
HSB Current Lim
V/f V/f
Sets the current limit during HSB as a percentage of the motor
rated current.
Default: <1>
Min.: 100%
Max.: 200%
–
n3-03
(058A)
High-Slip Braking
Dwell Time at Stop
HSB DwelTim@Stp
V/f V/f
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.
Default: 1.0 s
Min.: 0.0
Max.: 10.0
–
B.9 n: Special Adjustment
368 YASKAWA TOEP YAIP1W 01B YASKAWA AC Drive - iQpump1000 Quick Start Guide