12.10 N: Special Adjustment; N1: Hunting Prevention - YASKAWA GA700 Series Technical Manual

12.10 n: Special Adjustment

12.10 n: Special Adjustment
n parameters set these functions:
• Function to prevent hunting
• High-slip braking
• Motor line-to-line resistance online tuning
• Fine-tune the parameters that adjust motor control
◆

n1: Hunting Prevention

The Hunting Prevention function will not let low inertia or operation with a light load cause hunting. Hunting
frequently occurs when you have a high carrier frequency and an output frequency less than 30 Hz.
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n1-01: Hunting Prevention Selection
No.
Name
(Hex.)
n1-01 Hunting Prevention
Selection
(0580)
When drive response is more important than the decrease of motor vibration, disable this function.
If hunting occurs, or if you use a high carrier frequency or SwingPWM, set this parameter to 2 for better hunting
prevention.
0 : Disabled
1 : Enabled (Normal)
2 : Enabled (High Carrier Frequency)
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n1-02: Hunting Prevention Gain Setting
No.
Name
(Hex.)
n1-02 Hunting Prevention Gain
Setting
(0581)
Expert
Adjust this parameter in these conditions:
• When n1-01 = 1, 2 [Hunting Prevention Selection = Enabled (Normal), Enabled (High Carrier Frequency)]: If
oscillation occurs when you operate a motor with a light load, increase the setting value in 0.1-unit increments.
• When n1-01 = 1, 2, if the motor stalls: Decrease the setting value in 0.1-unit increments.
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n1-03: Hunting Prevention Time Constant
No.
Name
(Hex.)
n1-03 Hunting Prevention Time
Constant
(0582)
Expert
Adjust this parameter in these conditions:
• Load inertia is large: Increase the setting value. If the setting value is too high, response will be slower. Also,
there will be oscillation when the frequency is low.
• Oscillation occurs at low frequencies: Decrease the setting value.
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n1-05: Hunting Prevent Gain in Reverse
No.
Name
(Hex.)
n1-05 Hunting Prevent Gain in
Reverse
(0530)
Expert
918
V/f CL-V/f OLV CLV AOLV
Sets the function to prevent hunting.
V/f CL-V/f OLV CLV AOLV
Sets the performance of the hunting prevention function. Usually it is not necessary to change this
parameter.
V/f CL-V/f OLV CLV AOLV
Sets the primary delay time constant of the hunting prevention function. Usually it is not
necessary to change this parameter.
V/f CL-V/f OLV CLV AOLV
Sets the performance of the hunting prevention function. This parameter adjusts Reverse run.
Usually it is not necessary to change this parameter.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
YASKAWA SIEPC71061705H GA700 Series Technical Manual
Default
(Range)
Determined by o2-04
(0 to 2)
Default
(Range)
1.00
(0.00 - 2.50)
Default
(Range)
Determined by o2-04
(0 - 500 ms)
Default
(Range)
0.00
(0.00 - 2.50)