Mitsubishi Electric FR-A820-00046 Instruction Manual page 862

(G) Control parameters
Signal
name
X70
X71
Y85 DC feeding signal
Tab. 5-312: I/O signals for DC feeding mode 2
● Following is the connection diagram of switching to DC power supply using the power failure
detection of the inverter.
Fig. 5-340:
Assign the function by setting Pr. 178 to Pr. 189 (input terminal function selection).
Assign the function by setting Pr. 190 to Pr. 196 (output terminal function selection).
5 - 682
Name Description
To operate with DC feeding, turn ON the X70 signal.
When the inverter output is shutoff due to power failure, it
will be possible to start up 200 ms after turning ON the X70
DC feeding
signal. (Automatic restart after instantaneous power failure
operation
can start after the time set in Pr. 57 has elapsed.)
permission signal
When the X70 signal is turned OFF while operating the
inverter, output shutoff (Pr. 261 = 0) or deceleration stop
(Pr. 261 ≠ 0) will occur.
Turn ON when stopping the DC feeding.
When the X71 signal is turned ON during the operation of the
inverter and X70 signal is ON, output shutoff (Pr. 261 = 0) or
DC feeding cancel
deceleration stop (Pr. 261 ≠ 0) will occur, and Y85 signal will
signal
turn OFF after stopping.
After turning ON the X71 signal, operation is not possible
even if the X70 signal is turned ON.
This will turn ON during power failure or undervoltage of the
AC power supply. It will turn OFF when the X71 signal turns
ON or power restoration.
The Y85 signal will not turn OFF even with the power
restoration while the inverter is running, but turns OFF after
stopping the inverter.
When the Y85 signal is turned ON due to undervoltage, the
Y85 signal will not turn OFF even when the undervoltage is
resolved.
The ON/OFF status is maintained when the inverter is reset.
MCCB
Three-phase AC
power supply
DC power
MC1
(+)
(-)
Forward rotation start
Reverse rotation start
DC feeding permission signal
DC feeding cancel signal
Contact input common
3
Frequency command
2
Frequency setting
potentiometer
1/2 W 1 k
1
Connection example for DC feeding mode 2
Inverter
MC
Inrush
R/L1
current
limit circuit
S/L2
T/L3
R1/L11
S1/L21
P/+
N/-
STF
STR
∗1
X70
∗1
X71
SD
10
2
5
Parameter setting
Set "70" to either of Pr. 178
to Pr. 189.
Set "71" to either of Pr. 178
to Pr. 189.
Set "85 (positive logic) or
185 (negative logic)" to one
of Pr. 190 to Pr. 196.
U
V
IM
W
Earth
(Ground)
DC feeding signal
MC1
∗2
Y85
24 V DC
SE
Parameters
I002758E