12.10 N: Special Adjustment; N1: Hunting Prevention - YASKAWA CIPR-GA50C 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)
Note:
When you replace a V1000-series drive with a GA500 drive, set n1-01 = 1 [Hunting Prevention Selection = Enabled].
When drive response is more important than the decrease of motor vibration, disable this function.
0 : Disable
1 : Enabled
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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 [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.
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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.
■
n1-05: Hunting Prevent Gain in Reverse
No.
Name
(Hex.)
n1-05 Hunting Prevent Gain in
Reverse
(0530)
Expert
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:
710
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the function to prevent hunting.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the performance of the hunting prevention function. Usually it is not necessary to change this
parameter.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the primary delay time constant of the hunting prevention function. Usually it is not
necessary to change this parameter.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the performance of the hunting prevention function. This parameter adjusts Reverse run.
Usually it is not necessary to change this parameter.
Description
Description
Description
Description
YASKAWA SIEPC71061753A GA500 Technical Manual
Default
(Range)
0
( 0, 1 )
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)