YASKAWA Z1000U Series, Programming Manual

Page: 234 / 323

A.11 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.
Hex)
Name LCD Display Description Values Page
n1-01
(0580)
Hunting Prevention
Selection
Hunt Prev Select
0: Disabled
1: Enabled
0: Disabled
1: Enabled
Default: 1
Range: 0, 1
129
n1-02
(0581)
Hunting Prevention
Gain Setting
Hunt Prev Gain
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
129
n1-03
(0582)
Hunting Prevention
Time Constant
Hunt Prev Time
Sets the time constant used for Hunting Prevention.
Default:
<1>
Min.: 0 ms
Max.: 500 ms
129
n1-05
(0530)
Hunting Prevention
Gain while in Reverse
Hprev Gain @Rev
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
129
<1> Default setting is dependent on parameter o2-04, Drive Model Selection.
u
n3: Overexcitation Braking
No.
(Addr.
Hex)
Name LCD Display Description Values Page
n3-13
(0531)
Overexcitation
Deceleration Gain
Hflux Brake Gain
Sets the gain applied to the V/f pattern during Overexcitation
Deceleration (L3-04 = 4).
Default: 1.10
Min.: 1.00
Max.: 2.00
130
u
n8: PM Motor Control Tuning
No.
(Addr.
Hex)
Name LCD Display Description Values Page
n8-45
(0538)
Speed Feedback
Detection Control Gain
PM Spd Fdbk Gain
OLV/PM OLV/PM
Increase this setting if hunting occurs. Decrease to lower the
response.
Default: 0.80
Min.: 0.00
Max.: 10.00
131
n8-47
(053A)
Pull-In Current
Compensation Time
Constant
PM Pull-in I Tc
OLV/PM OLV/PM
Sets the time constant to make the pull-in current reference and
actual current value agree. Decrease the value if the motor
begins to oscillate, and increase the value if it takes too long for
the current reference to equal the output current.
Default: 5.0 s
Min.: 0.0
Max.: 100.0
131
n8-48
(053B) Pull-In Current
PM No-load Curr
OLV/PM OLV/PM
Defines the d-Axis current reference during no-load operation
at a constant speed. Set as a percentage of the motor rated
current. Increase this setting if hunting occurs while running at
constant speed.
Default: 30%
Min.: 20
Max.: 200
131
n8-49
(053C)
d-Axis Current for High
Efficiency Control
EnergySav ID Lvl
OLV/PM OLV/PM
Sets the d-Axis current reference when running a high load at
constant speed. Set as a percentage of the motor rated current.
Default:
<1>
Min.: -200.0%
Max.: 0.0%
131
n8-51
(053E)
Acceleration/
Deceleration Pull-In
Current
PM Pull-in I@Acc
OLV/PM OLV/PM
Sets the d-Axis current reference during acceleration/
deceleration as a percentage of the motor rated current. Set to a
high value when more starting torque is needed.
Default: 50%
Min.: 0
Max.: 200
131
n8-54
(056D)
Voltage Error
Compensation Time
Constant
PM V Error CompT
OLV/PM OLV/PM
Adjusts the value when hunting occurs at low speed. If hunting
occurs with sudden load changes, increase n8-54 in increments
of 0.1. Reduce this setting if oscillation occurs at start.
Default: 1.00 s
Min.: 0.00
Max.: 10.00
131
A.11 n: Special Adjustment
234 YASKAWA ELECTRIC SIEP C710636 10C Z1000U HVAC MATRIX Drive Programming Manual