YASKAWA V1000 Series Installation & Start-Up Manual page 397

No. Name
Hunting Prevention
n1-02
Gain Setting
Hunting Prevention
n1-03
Time Constant
Hunting Prevention
n1-05
Gain while in Reverse
Use n2 parameters to configure the Speed Feedback Detection Control function operation.
Speed Feedback
n2-01 Detection Control
(AFR) Gain
Speed Feedback
n2-02 Detection Control
(AFR) Time Constant
Speed Feedback
Detection Control
n2-03
(AFR) Time Constant
2
High-Slip Braking
n3-01 Deceleration
Frequency Width
YASKAWA TM.V1000.01 V1000 Drive Installation & Start-Up Manual (Preliminary 01-19-07)
Description
Sets the gain for the Hunting Prevention
Function.
If the motor vibrates while lightly loaded and
n1-01 = 1, increase the gain by 0.1 until
vibration ceases.
If the motor stalls while n1-01 = 1, decrease
the gain by 0.1 until the stalling ceases.
With Hunting Prevention, a derivative of the
output current is taken and the output voltage
is corrected in order to make the excitation
current a fixed value in V/f control. This will
also set a derivative of the time constant.
Sets the gain for Hunting Prevention.
When set to 0, n1-02 is also enabled when the
drive is operating in reverse.
n2: Speed Feedback Detection Control Function
Sets the internal speed feedback detection
control gain in the automatic frequency
regulator (AFR).
This parameter does not typically require
adjustment. Adjust this parameter as follows:
If hunting occurs, increase the set value.
If response is low, decrease the set value.
Sets the time constant to control the rate of
change in the speed feedback detection control.
Increase the setting if 0V occurs during sudden
load changes or the speed overshoots during
fast acceleration.
Sets the time constant to control the amount of
change in the speed at low speed.
n3: High-Slip Braking
Use n3 parameters to configure the high-slip braking function.
Sets the aggressiveness output frequency
reduction as the drive stops the motor using
high-slip braking (HSB).
If Overvoltage (OV) faults occur during HSB,
this parameter may need to be increased.
B.2 Parameter Table
Control
Mode
Range Def. Addr.
O
V/ P
Hex
L
f M
V
0.00 to
1.00 A − −
581
2.50
If this setting is too high, then stall
prevention may result due to
excessive current suppression.
<12
A − −
0 to 500 582
>
0.00 to
0.00 A − −
530
2.50
0.00 to
1.00 − A −
584
10.00
Adjust the setting by 0.05 units at a
time, while checking the response.
0 to 50
− A −
585
2000 ms
0 to 750
− A −
586
2000 ms
1 to 20 5% A − −
588
Pg.
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B
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