Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 540

• 24 V external power supply input
Inverter
MC1
MCCB
R/L1
S/L2
T/L3
R1/L11
S1/L21
+24
24VDC
SD
Standard models
 Operation of the self power management function
• This function controls the magnetic contactor (MC) on the input side using the output relay to reduce the standby power
during inverter stop. With the terminals R1/L11 and S1/L21 (refer to
to page 78), the main circuit power supply and control circuit power supply are separated, and the MC for main circuit power
supply is controlled by the electronic bypass MC1 signal.
• Set Pr.248 Self power management selection = "1 or 2", Pr.30 Regenerative function selection ≠ "20, 21, 120, or 121"
(other than DC feeding mode 2), and Pr.190 to Pr.196 (Output terminal function selection) = "17 (positive logic)" to
assign the Electronic bypass MC1 (MC1) signal to an output terminal.
• After the inverter is stopped and the time set in Pr.11 DC injection brake operation time and Pr.254 Main circuit power
OFF waiting time have passed, turning OFF the MC1 signal releases the MC on the input side (main circuit power supply
OFF). Set Pr.254 to prevent frequent MC operation.
• Turning ON the start signal turns ON the MC1 signal and closes the MC on the input side (main circuit power supply ON).
After the time set in Pr.137 Start waiting time has passed, the inverter starts. Set time slightly longer (about 0.3 to 0.5 s)
than the time period from the MC1-ON to the actual pick-up operation of the MC is turned ON in Pr.137.
Output frequency
(Hz)
STF ON
MC1
Power supply mode RST input
Main circuit power supply
MCCB
U
V M
W
MC1
MC1
24VDC
24VDC
SE
DC brake
Pr.11 Pr.254
OFF
ON OFF
R1S1 input/
external 24 V input
ON OFF
Converter unit
MC1
R/L1 P/+
S/L2 N/-
T/L3
R1/L11 RDA
S1/L21 RSO
Y17
SE
+24
24VDC
SD
Separated converter type
page 76) and 24 V external power supply input (refer
Time
Pr.137
ON
ON
RST input
ON
Inverter
P/+ U
N/- V M
W
X10
RES
MC1
X94
MC1
SD
+24
24VDC
SE
SD
5. PARAMETERS
5.14 (A) Application parameters
1
2
3
4
5
6
7
8
9
10
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