5-68
îš„Feed Forward: N5
User constants for the feed forward control are shown in the following table.
* The factory setting depends on the Inverter capacity. The value for a 200 V Class Inverter for 0.4 kW is given.
N3-03
High-slip
braking stop
dwell time
Set in seconds the dwell time
for the output frequency for
FMIN (1.5 Hz) during V/f
control.
Effective only during decel-
eration for high-slip braking.
0.0 to
10.0
1.0 s No A A No No 58AH -
N3-04
High-slip
braking OL
time
Set the OL time when the
output frequency does not
change for some reason dur-
ing deceleration for high-slip
braking.
30 to
1200
40 s No A A No No 58BH -
Con-
stant
Number
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
Page
V/f
V/f
with
PG
Open
Loop
Vec-
tor
Flux
Vec-
tor
N5-01
Feed for-
ward con-
trol
selection
Select the feed forward con-
trol.
0: Disabled
1: Enabled
0 or 1 0 No No No No A 5B0H
4-20
6-141
N5-02
Motor
accelera-
tion time
Set the time required to
accelerate the motor at the
rated torque (T
100
) to the
rated speed (Nr).
J: GD
2
/4, P: Motor rated out-
put
However,
0.001
to
10.000
0.178 s
*
No No No No A 5B1H
4-20
6-141
N5-03
Feed for-
ward pro-
portional
gain
Set the proportional gain for
feed forward control.
Speed reference response
will increase as the setting of
N5-03 is increased.
0.00 to
100.00
1.0 No No No No A 5B2H
4-20
6-141
N5-04
Response
frequency
for speed
command
Sets the response frequency
to a speed command in units
of 0.01 Hz.
Used when the machine
rigidity is high and the N5-
03 is correctly adjusted.
Usually, setting is not
required.
0.00 to
50.00
40.00
Hz
No No No No A 5B3H
4-20
6-141
Con-
stant
Number
Name Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
MEMO
BUS
Regis-
ter
Page
V/f
V/f
with
PG
Open
Loop
Vec-
tor
Flux
Vec-
tor
2Ï€ x J [kgm
2
] x Nr [min
-1
]
ta =
60
x T
100
[N x m]
[s]
T
100
=
×
10
3
[N
x
m]
60
2
x
P [kW]
Nr [min
-1
]
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