Instruction manual

57
To prevent shock at machine start/stop, accel/decel can be performed in S-
curve pattern.
Note : S-curve characteristic time is the time from accel/decel rate 0 to a regular accel/decel
rate determined by the set accel/decel time.
Soft-start characteristics (n023)
Setting
0
1
2
3
S-curve selection
S-curve characteristic not provided
0.2 s
0.5 s
1.0 s
FREQUENCY
REFERENCE
OUTPUT
FREQUENCY
S-CURVE CHARACTERISTIC TIME (Tsc)
OUTPUT
FREQUENCY
TIME
The following time chart shows FWD/REV run switching at deceleration to
a stop.
DC INJECTION BRAKING
TIME AT STOP
n090
MIN. OUTPUT FREQUENCY
MIN. OUTPUT
FREQUENCY n016
DECELERATION
DECELERATION
ACCELERATION
FORWARD RUN COMMAND
REVERSE RUN COMMAND
OUTPUT FREQUENCY
S-curve characteristics in
ACCELERATION
n016