Mitsubishi Electric FR-A820-00046 (0.4K), Instruction Manual

Page: 922 / 1218

(G) Control parameters Parameters
5 - 720
●
Following is the connection diagram of switching to DC power supply using the power failure
detection of the inverter.
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).
Signal
name
Name Description Parameter setting
In
p
u
t
X70
DC feeding
operation
permission signal
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
signal. (Automatic restart after instantaneous power failure
can start after the time set in Pr. 57 has elapsed.)
When the X70 signal is turned OFF while operating the
inverter, output shutoff (Pr. 261 = 0) or deceleration stop
(Pr. 261 ≠ 0) will occur.
Set "70" to either of Pr. 178
to Pr. 189.
X71
DC feeding cancel
signal
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
deceleration stop (Pr. 261 ≠ 0) will occur, and Y85 signal will
turn OFF after stopping.
After turning ON the X71 signal, operation is not possible
even if the X70 signal is turned ON.
Set "71" to either of Pr. 178
to Pr. 189.
Output
Y85 DC feeding signal
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.
Set "85 (positive logic) or
185 (negative logic)" to one
of Pr. 190 to Pr. 196.
Tab. 5-326: I/O signals for DC feeding mode 2
I002758E_G
Fig. 5-358: Connection example for DC feeding mode 2
MCCB MC
R/L1
S/L2
T/L3
U
V
W
P/+
N/-
SE
Y85
STF
STR
X70
X71
PC
R1/L11
S1/L21
10
2
2
3
1
5
(+)
(-)
MC1
MC1
Three-phase AC
power supply
DC power
Inverter
Inrush
current
limit circuit
Earth
(Ground)
DC feeding signal
Forward rotation start
Reverse rotation start
DC feeding permission signal
DC feeding cancel signal
Contact input common
Frequency command
Frequency setting
potentiometer
1/2 W 1 k
24 V DC
IM