Mitsubishi Electric 800 Series, Instruction Manual, Page: 516 / 727

(A) Application parameters
PARAMETERS
515
5
GROUP
A
5.14.14
Automatic restart after instantaneous power
failure/flying start with an induction motor

The coasting time when Pr.57 = "0" is as shown below. (When Pr.162, Pr.570 are set to the initial value.)
FR-A860-00027: 0.5 s
FR-A860-00061 to FR-A860-00170: 1 s
FR-A860-00320 to FR-A860-01080: 3.0 s
FR-A860-01440 or higher: 5.0 s
POINT POINT
• To operate the inverter with the automatic restart after instantaneous power failure function enabled, check the following
points.
• Set Pr.57 Restart coasting time = "0".
• Turn the terminal CS (Selection of automatic restart after instantaneous power failure, flying start) ON.
• When the Selection of automatic restart after instantaneous power failure / flying start (CS) signal is assigned to the input
terminal, restart operation is enabled at turn-ON of the CS signal.
The inverter can be restarted without stopping the motor in the following conditions:
• When switching from commercial power supply operation over to inverter running
• When an instantaneous power failure occurs during inverter running
• When the motor is coasting at start
Pr. Name
Initial
value Setting
range
Description
162
A700
Automatic restart after
instantaneous power
failure selection
0
0, 1000 Frequency search only performed at the first start
1, 1001
Reduced voltage start only at the first start
(no frequency search)
2, 1002 Encoder detection frequency search
3, 1003
Frequency search only performed at the first start (reduced
impact restart)
10, 1010 Frequency search at every start
11, 1011 Reduced voltage start at every start (no frequency search)
12, 1012 Encoder detection frequency search at every start
13, 1013 Frequency search at every start (reduced impact restart)
299
A701
Rotation direction
detection selection at
restarting
0
0 Without rotation direction
1 With rotation direction
9999
When Pr.78 ="0", with rotation direction
When Pr.78 ="1, 2" without rotation direction
57
A702
Restart coasting time
9999
0 Coasting time differs according to the inverter capacity.

0.1 to 30 s
Set the time delay for the inverter to perform a restart after
restoring power due to an instantaneous power failure.
9999 No restart
58
A703
Restart cushion time
1 s 0 to 60 s Set the voltage cushion time for restart.
163
A704 First cushion time for
restart
0 s 0 to 20 s
Set the voltage cushion time for restart.
Consider this matched to the size of the load (moment of
inertia/torque)
164
A705 First cushion voltage for
restart
0% 0 to 100%
165
A710 Stall prevention
operation level for restart
150% 0 to 400%
Set the stall prevention operation level at a restart operation
on the assumption that the inverter rated current is 100%.
611
F003 Acceleration time at a
restart
9999
0 to 3600 s
Set the acceleration time that takes to reach Pr.20
Acceleration/deceleration reference frequency setting at a
restart.
9999
Standard acceleration time (for example, Pr.7 ) is applied as
the acceleration time at restart.
V/F V/F V/F Magnetic flux Magnetic flux Magnetic flux Sensorless Sensorless Sensorless Vector Vector Vector