56
Momentary Power Loss Ridethrough Method (n47)
When constant n47 is set to 1 or 2, operation automatically restarts even
if a momentary power loss occurs.
* 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 (n20)
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.
Setting
Description
0
Continuous operation after momentary power
loss not enabled.
1
*1
Continuous operation after power recovery
within momentary power loss ridethrough time
2
*1,
*2
Continuous operation after power recovery
(Fault output not produced.)
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