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Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual Page 695

Fr-a800 series.
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Signal name
DC feeding operation
X70
permission
Input
X71
DC feeding cancel
Output Y85
DC current feeding
• Following is the connection diagram of switching to DC power supply using the power failure detection of the inverter.
*1
Assign the function using Pr.178 to Pr.182 (Input terminal function selection).
*2
Assign the function using Pr.190 to Pr.196 (Output terminal function selection).
694
5. PARAMETERS
5.16 (G) Control parameters
Name
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.
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.
This signal 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
1/2W1kΩ
Description
Inverter
MC
Inrush
R/L1
U
current
limit circuit
S/L2
V
T/L3
W
R1/L11
S1/L21
P/+
N/-
STF
STR
∗1
X70
∗1
X71
∗2
Y85
SD
10
SE
2
5
Parameter setting
Set "70" in any of Pr.178 to
Pr.189.
Set "71" in any of Pr.178 to
Pr.189.
Set "85 (positive logic) or
185 (negative logic)" in any
of Pr.190 to Pr.196.
IM
Earth
(Ground)
DC feeding signal
MC1
24VDC

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