YASKAWA Varispeed V7 Instruction Manual page 146

* 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.
Setting
0
1
2
3
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.
Frequency
reference
Output
frequency
S-curve characteristic time (Tsc)
The following time chart shows switching between FWD/REV run
when decelerating to a stop.
FORWARD RUN command
REVERSE RUN command
Output frequency
S-curve characteristics in
S-curve characteristic not provided.
Acceleration
Min. Output
Frequency n016
7. Programming Features
S-curve Selection
0.2 s
0.5 s
1.0 s
Output
frequency
Deceleration
MIN. OUTPUT FREQUENCY
n016
Acceleration
Time
DC Injection Braking
Time at Stop
n090
Deceleration
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