5
-32
n: Special Adjustments
The following settings are made with the special adjustments parameters ( n-parameters): Hunting prevention
and speed feedback detection control.
Hunting Prevention Function: n1
High-slip Braking: n3
Param-
eter-
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Access
Level
RS-422A/
485
Register
Page
LCD
Display
n1-01
Hunting-pre-
vention func-
tion selection
0: Hunting-prevention function
disabled
1: Hunting-prevention function
enabled
The hunting-prevention function
suppresses hunting when the
motor is operating with a light
load.
If high response has the priority
over vibration suppression, dis-
able the hunting-prevention func-
tion.
0 or 1
1
No
A
580H
6-29
Hunt Prev
Select
n1-02
Hunting-pre-
vention gain
Set the hunting-prevention gain
multiplication factor.
Normally, there is no need to
change this setting.
Make the adjustments as follows:
• If vibration occurs with light
load, increase the setting.
• If the motor stalls, reduce the
setting.
If the setting is to large, the volt-
age will be to suppressed and the
motor may stall.
0.00 to
2.50
1.00
No
A
581H
4-13
6-29
Hunt Prev
Gain
Param-
eter-
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Access
Level
RS-422A/
485
Register
Page
LCD
Display
n3-01
High-slip brak-
ing decelera-
tion frequency
width
Sets the frequency width for
deceleration during high-slip
braking in percent, taking the
Maximum Frequency (E1-04) as
100%.
1 to 20
5%
No
A
588H
-
HSB Decel
Width
n3-02
High-slip brak-
ing current
limit
Sets the current limit for decelera-
tion during high-slip braking in
percent, taking the motor rated
current as 100%. The resulting
limit must be 150% of the Inverter
rated current or less.
100 to
200
150%
No
A
589H
-
HSB Current
Ref