User`s manual
5-59
5
Automatic Frequency Regulator: N2
High-slip Braking: N3
Param-
eter
Num-
ber
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO-
BUS
Register
Page
V/f
V/f
with
PG
Open
Loop
Vector
Closed
Loop
Vector
N2-01
Speed feed-
back detec-
tion control
(AFR) gain
Sets the internal speed feed-
back detection control gain.
Normally, there is no need to
change this setting.
If necessary, adjust this
parameter as follows:
• If hunting occurs, increase
the set value.
• If response is low, decrease
the set value.
Adjust the setting by 0.05 at a
time, while checking the
response.
0.00 to
10.00
1.00 No No No A No 584H
4-14
6-42
AFR Gain
N2-02
Speed feed-
back detec-
tion control
(AFR) time
constant
Set the time constant 1 to
decide the rate of change in
the speed feedback detection
control.
0 to
2000
50 ms No No No A No 585H 6-42
AFR Time
N2-03
Speed feed-
back detec-
tion control
(AFR) time
constant 2
Set the time constant 2 to
decide the rate of change in
the speed.
0 to
2000
750 ms No No No A No 586H 6-42
AFR Time 2
Param-
eter
Num-
ber
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO-
BUS
Register
Page
V/f
V/f
with
PG
Open
Loop
Vector
Closed
Loop
Vector
Display
N3-01
High-slip
braking
deceleration
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 A No No 588H 6-128
HSB Down
Freq
N3-02
High-slip
braking cur-
rent limit
Sets the current limit for
deceleration 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 A No No 589H 6-128
HSB Current
N3-03
High-slip
braking stop
dwell time
Sets the dwell time of the out-
put frequency for FMIN (1.5
Hz) during V/f control.
Effective only during deceler-
ation with high-slip braking.
0.0 to
10.0
1.0 s No A A No No 58AH 6-128
HSB Dwell
Time
N3-04
High-slip
braking OL
time
Set the OL time when the out-
put frequency does not change
for any reason during deceler-
ation with high-slip braking.
30 to
1200
40 s No A A No No 58BH 6-128
HSB OL
Time