YASKAWA CR700, Техническое руководство, Страница: 771 / 886

Parameter
Details
11
11.10 n: Special Adjustment
YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual 771
If the motor oscillates, set n1-01 = 2 . If that does not have an effect, increase this parameter in 0.2-unit
increments.
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n1-17: Hunting Prevent High Fc Filter
No.
(Hex.)
Name Description
Default
(Range)
n1-17
(0BFC)
Expert
Hunting Prevent High Fc
Filter
Sets the responsiveness of the hunting prevention function. Usually it is not necessary to change
this parameter.
500 ms
(0 - 1000 ms)
When n1-01 = 2 [Hunting Prevention Selection = Enabled (High Carrier Frequency)] , if the motor stalls when
the load changes, increase the value set in this parameter in 100 ms increments.
If you set
n1-01 = 2 and you cannot suppress hunting, increase the value set in this parameter in 100 ms
increments.
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n1-20: Voltage Calibration Duration
No.
(Hex.)
Name Description
Default
(Range)
n1-20
(1588)
Expert
Voltage Calibration
Duration
Sets the calibration time at start. Usually it is not necessary to change this parameter.
50 ms
(10 - 500 ms)
◆
n2: Auto Freq Regulator (AFR)
The speed feedback detection reduction function (or AFR: Automatic Frequency Regulator) helps the speed
become stable when you suddenly apply or remove a load.
Note:
Before you change
n2-xx parameters
, do one of these procedures:
• Set the motor parameters and V/f pattern correctly.
• Do Rotational Auto-Tuning.
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n2-01: Automatic Freq Regulator Gain(F)
No.
(Hex.)
Name Description
Default
(Range)
n2-01
(0584)
Automatic Freq Regulator
Gain(F)
Sets the gain of the AFR function for forward run as a magnification value. Usually it is not
necessary to change this setting.
1.00
(0.00 - 10.00)
Adjust this parameter in these conditions:
• If hunting or oscillation occurs with light loads, increase the setting value in 0.05-unit increments and examine
the response.
• When torque is not sufficient with heavy loads or to make the torque or speed response better, decrease the
setting value in 0.05-unit increments and examine the response.
■
n2-02: Automatic Freq Regulator Time 1
No.
(Hex.)
Name Description
Default
(Range)
n2-02
(0585)
Automatic Freq Regulator
Time 1
Sets the time constant that sets the rate of change for the AFR function. Usually it is not necessary
to change this setting.
50 ms
(0 - 2000 ms)
Adjust this parameter in these conditions:
• If there is hunting or oscillation with a light load, increase the setting value in 50 ms increments and examine
the response. If the load inertia is large, increase the setting value in 50 ms increments and examine the
response.
• If torque is not sufficient with a heavy load or if you must increase torque or speed responsiveness, decrease the
setting value in 10 ms increments and examine the response.
Note:
• Set n2-02 ≤ n2-03 [Automatic Freq Regulator Time 2] . If n2-02 > n2-03 , the drive will detect oPE08 [Parameter Selection Error] .
• When you change the value in n2-02 , also change the value in C4-02 [Torque Compensation Delay Time] by the same ratio.
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV