7. Programming Features
145
* 1. Hold the operation signal to continue operation after recovery from a
momentary power loss.
* 2. When 2 is selected, the Inverter restarts if power supply voltage recovers
while the control power supply is held.
No fault signal is output.
S-curve Selection (n023)
To prevent shock when starting and stopping the machine, acceleration/
deceleration can be performed using an S-curve pattern.
Note: The S-curve characteristic time is the time from acceleration/decelera-
tion rate 0 to the normal acceleration/deceleration rate determined by the
set acceleration/deceleration time.
The following time chart shows switching between FWD/REV run
when decelerating to a stop.
Setting
S-curve Selection
0
S-curve characteristic not provided.
1
0.2 s
2
0.5 s
3
1.0 s
Frequency
reference
Output
frequency
Time
S-curve characteristic time (Tsc)
Output
frequency
FORWARD RUN command
REVERSE RUN command
Acceleration
Output frequency
Min. Output
Frequency n016
S-curve characteristics in
Acceleration
Deceleration
DC Injection Braking
Time at Stop
n090
Deceleration
MIN. OUTPUT FREQUENCY
n016
