C
Co
on
ns
stta
an
ntt S
S--C
Cu
urrv
ve
e A
Ac
cc
ce
ell/
/D
De
ec
ce
ell
Factory Setting: 0
n
n 4
4 9
9
S
Se
elle
ec
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n
An S-curve pattern is used to reduce shock and provide smooth transitions during
machine acceleration and deceleration.
Setting
Description
0
S-Curve not provided
1
S-Curve for 0.2 seconds
2
S-Curve for 0.5 seconds
3
S-Curve for 1.0 seconds
NOTE: S-curve characteristic
time is the time from current
frequency to the regular rate
determined by the set
accel/decel time.
The following figure shows
FWD/REV run switching and
acceleration & deceleration to
a stop with S-curve active.
48
OUTPUT
FREQUENCY
FREQUENCY
REFERENCE
TIME
S-CURVE CHARACTERISTIC TIME (sec)
OUTPUT FREQUENCY
FORWARD RUN COMMAND
= S-CURVE CHARACTERISTIC
REVERSE RUN COMMAND
MIN. OUTPUT
FREQUENCY
n29
n29
ACCELERATION
DECELERATION
ACCELERATION
DC INJECTION
BRAKING
TIME AT STOP
n47
DECELERATION
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