N: Special Adjustment; N: Special Adjustment; N1: Hunting Prevention; N2: Speed Feedback Detection Control (Afr) Tuning - YASKAWA AC Drive-A1000 Technical Manual

B.11 n: Special Adjustment
B.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. 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.
u

n2: Speed Feedback Detection Control (AFR) Tuning

No.
(Addr. Name
Hex)
n2-01 Speed Feedback Detection
(584) Control (AFR) Gain
Speed Feedback Detection
n2-02
Control (AFR) Time
(585)
Constant 1
Speed Feedback Detection
n2-03
Control (AFR) Time
(586)
Constant 2
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 Current
(589) Limit
436
V/f V/f V/f w PG V/f w PG OLV
OLV/PM AOLV/PM CLV/PM
0: Disabled
1: Enabled
V/f V/f V/f w PG V/f w PG OLV
OLV/PM AOLV/PM CLV/PM
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.
V/f V/f V/f w PG V/f w PG OLV
OLV/PM AOLV/PM CLV/PM
Sets the time constant used for Hunting Prevention.
V/f V/f V/f w PG V/f w PG OLV
OLV/PM AOLV/PM CLV/PM
Sets the gain used for Hunting Prevention. If set to 0, the gain set to n1-02 is
used for operation in reverse.
V/f V/f w PG OLV OLV
OLV/PM AOLV/PM CLV/PM
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.
V/f V/f w PG OLV OLV
OLV/PM AOLV/PM CLV/PM
Sets the time constant used for speed feedback detection control (AFR).
V/f V/f w PG OLV OLV
OLV/PM AOLV/PM CLV/PM
Sets the AFR time constant to be used during Speed Search and during regen.
V/f V/f V/f w PG V/f w PG OLV
OLV/PM AOLV/PM CLV/PM
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.
V/f V/f V/f w PG V/f w PG OLV
OLV/PM AOLV/PM CLV/PM
Sets the current limit during HSB as a percentage of the motor rated current.
YASKAWA ELECTRIC SIEP C710616 31B YASKAWA AC Drive – A1000 Technical Manual
Description
CLV
CLV
CLV
CLV
Description
CLV
CLV
CLV
Description
CLV
CLV
Values Page
Default: 1
269
Range: 0, 1
Default: 1.00
Min.: 0.00 269
Max.: 2.50
<1>
Default:
269
Min.: 0 ms
Max.: 500 ms
Default: 0.00
Min.: 0.00 269
Max.: 2.50
Values Page
Default: 1.00
Min.: 0.00 270
Max.: 10.00
Default: 50 ms
Min.: 0 270
Max.: 2000
Default: 750 ms
Min.: 0 270
Max.: 2000
Values Page
Default: 5%
Min.: 1 270
Max.: 20
<1>
Default:
270
Min.: 0%
Max.: 200%