YASKAWA GA800 Series, Technical Reference

Page: 949 / 1016

Parameter
Details
12
12.10 n: Special Adjustment
YASKAWA SIEPC71061737B GA800 Drive Technical Reference 949
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.
■
n1-01: Hunting Prevention Selection
No.
(Hex.)
Name Description
Default
(Range)
n1-01
(0580)
Hunting Prevention
Selection
Sets the function to prevent hunting.
Determined by o2-04
(0 to 2)
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)
■
n1-02: Hunting Prevention Gain Setting
No.
(Hex.)
Name Description
Default
(Range)
n1-02
(0581)
Expert
Hunting Prevention Gain
Setting
Sets the performance of the hunting prevention function. Usually it is not necessary to change this
parameter.
1.00
(0.00 - 2.50)
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.
■
n1-03: Hunting Prevention Time Constant
No.
(Hex.)
Name Description
Default
(Range)
n1-03
(0582)
Expert
Hunting Prevention Time
Constant
Sets the primary delay time constant of the hunting prevention function. Usually it is not necessary to
change this parameter.
Determined by o2-04
(0 - 500 ms)
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.
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
V/f CL-V/f OLV CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV