YASKAWA H6B1A002, Technical Reference

Page: 347 / 794

Parameter
Details
5
5.9 n: Special Adjustment
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference 347
5.9 n: Special Adjustment
n parameters set these functions:
•
Function to prevent hunting
•
High-slip braking
•
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. 1
(0, 1)
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 Swing PWM, set this parameter to 2 for better hunting
prevention.
0 : Disabled
1 : Enabled (Normal)
■
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.
■
n1-05: Hunting Prevent Gain in Reverse
No.
(Hex.)
Name Description
Default
(Range)
n1-05
(0530)
Expert
Hunting Prevent Gain in
Reverse Sets the performance of the hunting prevention function. This parameter adjusts Reverse run. Usually
it is not necessary to change this parameter. 0.00
(0.00 - 2.50)