4-16
Adjustable time
The acceleration and deceleration time can be set.
Set a long time to accelerate or decelerate slowly or set a short
time to accelerate or decelerate quickly.
The time setting is the time it takes to accelerate from zero to the
maximum frequency and to decelerate from the maximum
frequency to zero.
Switching of the 1st/2
nd
/3
nd
acceleration time and the 1st/2
nd
/3
nd
deceleration time can be controlled with
intelliginet input terminal assigned to 08 (SET)/17(SET3).
Set item
Function code
Limit of setting
Contents
Acceleration
time
F002/F202
0.01-3600.
Unit : second
Setting acceleration time from zero to maximum
frequency.
Deceleration
time
F003/F203
0.01-3600.
Unit : second
Setting deceleration time from maximum
frequency to zero.
However short you set the adjustable time, the adjustable time of the actual motor can’t be shorter than the
shortest adjustable time determined by the inertial Effect J of the mechanical system and motor torque.
If you set the time shorter than the shortest adjustable time, a protection trip of OC or OV may occur.
Acceleration time t
s
t
s =
Deceleration time t
B
t
B
=
Chapter4 Explanation of function
F002/F202: 1
st
/2
nd
acceleration time
F003/F203: 1
st
/2
nd
deceleration time
A004/A204: 1
st
/2
nd
maximum frequency
Relation code
Output frequency setting
Output frequency
Maxi mum
frequency
A004/A204
Actual
acceleration
time
F002/F202
Actual
deceleration
time
F003/F203
(J
L +
J
M
) x N
M
9.55 x (T
S
- T
L
)
(J
L +
J
M
) x N
M
9.55 x (T
B
+T
L
)
J
L
: J of the load converted into motor shaft (kg•m
2
)
J
M
: J of the motor (kg•m
2
)
N
M
: Motor revolving (r/min)
T
S
: The maximum motor acceleration torque on inverter driving (N•m)
T
B
: The maximum motor deceleration torque on inverter driving (N•m)
T
L
: Needed transit torque (N•m)
