Mitsubishi Electric FR-F740 EC Instruction Manual page 252

Motor brake and stop operation
Operation example 1 at power failure
Operation example 2 at power failure (when DC power is restored)
Operation example 3 at power failure (when continuous operation is performed)
Fig. 6-51:
6 - 102
AC power supply
Control power supply
ON
AC power supply
Y85 (MC)
X70
X71
ON
STF (STR)
Output frequency
(Hz)
Control power supply AC
AC power supply
ON
Y85 (MC)
X70
OFF
X71
STF (STR)
ON
Output frequency
(Hz)
Control power supply
AC
AC power supply
ON
Y85 (MC)
X70
ON
OFF
X71
STF (STR)
ON
Output frequency
(Hz)
Operation examples at power failure
DC power supply
ON
ON
ON
ON
Motor
coasting
Approx. 150 ms
Back up operation
DC AC
Power restoration
Turns off after stop
while running
ON
ON
ON
Motor
coasting
Approx. 150 ms
Back up operation
DC AC
Power restoration
ON Remains on while running
Back up operation
Parameter
Time
Time
Time
I002096E