Mitsubishi Electric 800 Series, Instruction Manual, Page: 612 / 727

(G) Control parameters
PARAMETERS
611
5
GROUP
G
 DC feeding mode 1 (Pr.30 = "10, 11") (Standard models)
• For standard models, setting Pr.30 ="10 or 11" allows operation with a DC power supply.
• Do not connect anything to the AC power supply connecting terminals R/L1, S/L2, and T/L3, and connect the DC power
supply to the terminals P/+ and N/-. Also, remove the jumpers between terminal R/L1 and R1/L11 and between S/L2 and
S1/L21, and connect the terminals R1/L11 and S1/L21 to the terminals P/+ and N/- respectively.
• Following is a connection example.
 DC feeding mode 2 (Pr.30 = "20 or 21") (Standard models)
• When Pr.30 = "20, 21", it will normally operate with AC power supply and operate with DC power supply such as batteries
at the time of power failure.
• Connect the AC power supply to the AC power supply connecting terminals R/L1, S/L2, and T/L3, and connect the DC
power supply to the terminals P/+ and N/-. Also, remove the jumpers between terminal R/L1 and R1/L11 and between S/L2
and S1/L21, and connect the terminals R1/L11 and S1/L21 to the terminals P/+ and N/- respectively.
• Operation with DC current is possible by turning ON the DC feeding operation permission signal (X70). For details on I/O
signal, refer to following table.
CAUTION
 Do not connect a separated converter type inverter to a DC power supply. Doing so may damage the
inverter.
Signal
name
Name Description
Parameter
setting
Input
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 .
DC power
R/L1
S/L2
T/L3
U
V
W
P/+
N/-
IM
Forward rotation start
Reverse rotation start
Contact input common
STF
STR
SD
R1/L11
S1/L21
Earth
(Ground)
Inverter
10
2
2
3
1
Frequency command
Frequency setting
potentiometer
1/2 W 1 k
Ω
5
(+)
(-)
Inrush
current
limit circuit
MC