Mitsubishi Electric FR-A820-00046 Instruction Manual page 863

Parameters
● Operation example at the time of power failure occurrence 1
Fig. 5-341:
● Operation example at the time of power failure occurrence 2 (when the AC power supply is
restored)
Fig. 5-342:
FR-A800
Control power supply AC power supply
ON
AC power supply
Y85 (MC)
X70
X71
STF (STR)
Output
frequency [Hz]
Operation example 1 at power failure
Control power supply
AC power supply
ON
AC power supply
Y85 (MC)
X70
X71
STF (STR)
Output
frequency [Hz]
Operation example 2 at power failure (when DC power is restored))
DC power supply
ON
ON
ON
Motor
coasting
Back up operation
DC
ON
ON
ON
Motor
coasting
Approx. 200 ms
Back up operation
(G) Control parameters
ON
ON
Time
Approx. 200 ms
AC
Power restoration
Turns off after stop
while running
ON
Time
I001563E
I001564E
5 - 683