Mitsubishi F700 Series Instruction Manual page 122

 The following shows the connection diagram when switching to DC power supply using inverter power failure
detection.
Three-phase AC
power supply
DC power
(+)
(-)
DC feeding permission signal
DC feeding cancel signal
Contact input common
Frequency command
Frequency setting
potentiometer
1/2W1kΩ
*1 Assign the function using Pr. 178 to Pr. 189 (input terminal function selection).
*2 Assign the function using Pr. 190 to Pr. 196 (output terminal function selection).
 Operation example 1 at power failure
Control power
AC power supply
MCCB MC
R/L1
S/L2
T/L3
R1/L11
S1/L21
MC1
P/+
N/-
STF
Forward rotation start
STR
Reverse rotation start
X70
X71
PC
10
3
2
2
5
1
AC power supply
supply
ON
Y85(MC)
X70
X71
ON
STF(STR)
Output
frequency
(Hz)
Motor brake and stop operation
Inverter
Inrush
current U
limit circuit
V
W
Earth
(Ground)
*1
DC feeding signal
*1
MC1
*2
Y85
SE
DC power supply
ON
ON
ON
ON
Motor
coasting
Approx. 150ms
Back up operation
IM
24VDC
Time
111
4