2.10 n: Special Adjustment
406 YASKAWA TOEPYAIGA5002A GA500 DRIVE PROGRAMMING
Note:
When you set n1-05 = 0, the value set in n1-02 [Hunting Prevention Gain Setting] is effective when the motor rotates in reverse.
Adjust this parameter in these conditions:
• When n1-01 = 1 [Hunting Prevention Selection = Enabled (Normal), if oscillation occurs when you operate a
motor with a light load, increase the setting value in 0.1-unit increments.
• When n1-01 = 2, if the motor stalls, decrease the setting value in 0.1-unit increments.
■ n1-13: DC Bus Stabilization Control
No.
(Hex.)
Name Description
Default
(Range)
n1-13
(1B59)
Expert
DC Bus Stabilization
Control
Sets the oscillation suppression function for the DC bus voltage.
0
(0, 1)
0 : Disabled
1 : Enabled
Note:
If the DC bus voltage does not become stable with light loads and the drive detects ov [Overvoltage], set this parameter to 1.
■ n1-14: DC Bus Stabilization Time
No.
(Hex.)
Name Description
Default
(Range)
n1-14
(1B5A)
Expert
DC Bus Stabilization Time
Adjusts the responsiveness of the oscillation suppression function for the DC bus voltage. Set n1-13
= 1 [DC Bus Stabilization Control = Enabled] to enable this parameter.
100.0 ms
(50.0 - 500.0 ms)
Note:
Adjust this parameter in 100 ms increments.
◆ 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.
■ n2-01: Automatic Freq Regulator Gain
No.
(Hex.)
Name Description
Default
(Range)
n2-01
(0584)
Automatic Freq Regulator
Gain
Sets the gain of the AFR function 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.
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