11.10 N: Special Adjustment; N1: Hunting Prevention Function - YASKAWA GA700 Technical Manual

11.10 n: Special Adjustment

11.10 n: Special Adjustment
n parameters are used to set the following functions.
• Hunting prevention function
• High-slip braking
• Motor line-to-line resistance online tuning
• Fine tune the parameters that adjust motor control
◆

n1: Hunting Prevention Function

Hunting Prevention prevents the drive from hunting as a result of low inertia or operating with light load. Hunting
often occurs with a high carrier frequency and an output frequency below 30 Hz.
■
n1-01: Hunting Prevention Selection
No.
Name
(Hex.)
n1-01 Hunting Prevention
Selection
(0580)
Disable this function to prioritize responsiveness over motor vibration reduction.
If hunting occurs, or when a high carrier frequency or SwingPWM is being used, greater suppression of hunting
can be obtained by selecting n1-01 = 2.
0 : Disabled
1 : Enabled
2 : Enable (High carry)
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n1-02 Hunting Prevention Gain Setting
No.
Name
(Hex.)
n1-02 Hunting Prevention
Gain Setting
(0581)
Adjust this parameter in the following circumstances.
• With settings of n1-01 = 1, 2 [Hunting Prevention Selection = Enabled, Enable (High carry)]: If oscillation
occurs when operating a motor with a light load, increase the setting value in increments of 0.1.
• With settings of n1-01 = 1, 2, if the motor stalls: Reduce the setting value in increments of 0.1.
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n1-03: Hunting Prevention Time Constant
No.
Name
(Hex.)
n1-03 Hunting Prevention
Time Constant
(0582)
Adjust this parameter in the following circumstances.
• Load inertia is great: Increase the setting value. However, response will be slower if the setting value is too
high. Also, since the frequency is low, oscillation will occur.
• Oscillation occurs at low frequencies: Reduce the setting value.
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n1-05: HuntingPreventionGain whileinRev
No.
Name
(Hex.)
n1-05 HuntingPrevention
Gain whileinRev
(0530)
874
V/f CL-V/f OLV CLV AOLV
Enables or disables the hunting prevention function.
V/f CL-V/f OLV CLV AOLV
Adjusts the behavior of the hunting prevention function. Normally there is
no need to configure this setting.
V/f CL-V/f OLV CLV AOLV
Adjusts the responsiveness (primary delay time constant) of the hunting
prevention function. Normally there is no need to configure this setting.
V/f CL-V/f OLV CLV AOLV
Adjusts the behavior of the hunting prevention function. Used to adjust
Reverse run. Normally there is no need to configure this setting.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
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
Default
(Range)
1
(0 - 2)
Default Setting
(Range)
1.00
(0.00 - 2.50)
Default Setting
(Range)
Determined by o2-04
(0 - 500 ms)
Default Setting
(Range)
0.00
(0.00 - 2.50)