Automatic Restart After Instantaneous Power Failure/Flying Start With An Induction Motor - Mitsubishi FR-A800 Instruction Manual

(A) Application parameters
5.14.13
Automatic restart after instantaneous power
failure/flying start with an induction motor
V/F V/F V/F
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
Automatic restart after
162
instantaneous power
A700
failure selection
Rotation direction
299
detection selection at
A701
restarting
57
Restart coasting time
A702
58
Restart cushion time
A703
163 First cushion time for
A704 restart
164 First cushion voltage for
A705 restart
165 Stall prevention
A710 operation level for restart
611 Acceleration time at a
F003 restart
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The coasting time when Pr.57 = "0" is as shown below. (When Pr.162, Pr.570 are set to the initial value.)
FR-A820-00105(1.5K) or lower and FR-A840-00052(1.5K) or lower: 0.5 s
FR-A820-00167(2.2K) to FR-A820-00490(7.5K) and FR-A840-00083(2.2K) to FR-A840-00250(7.5K): 1 s
FR-A820-00630(11K) to FR-A820-03160(55K), FR-A840-00310(11K) to FR-A840-01800(55K): 3.0 s
FR-A820-03800(75K) or higher and FR-A840-02160(75K) 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.
528
PARAMETERS
Magnetic flux Magnetic flux Sensorless Magnetic flux Sensorless Vector Sensorless Vector Vector
Initial
value
0
0
9999
1 s
0 s
0%
150%
9999
Setting
range
0 Frequency search only performed at the first start
Reduced voltage start only at the first start
1
(no frequency search)
2 Encoder detection frequency search
Frequency search only performed at the first start (reduced
3
impact restart)
10 Frequency search at every start
11 Reduced voltage start at every start (no frequency search)
12 Encoder detection frequency search at every start
13 Frequency search at every start (reduced impact restart)
0 Without rotation direction
1 With rotation direction
When Pr.78 ="0", with rotation direction
9999
When Pr.78 ="1, 2" without rotation direction
0 Coasting time differs according to the inverter capacity.
Set the waiting time for the inverter to perform a restart at
0.1 to 30 s
power restoration after an instantaneous power failure.
9999 No restart
0 to 60 s Set the voltage cushion time for restart.
0 to 20 s
Set the voltage cushion time for restart.
Consider this matched to the size of the load (moment of
inertia/torque)
0 to 100%
Set the stall prevention operation level at a restart operation
0 to 400%
on the assumption that the inverter rated current is 100%.
Set the acceleration time that takes to reach Pr.20
0 to 3600 s Acceleration/deceleration reference frequency setting at a
restart.
Standard acceleration time (for example, Pr.7) is applied as the
9999
acceleration time at restart.
Description
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