Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual page 599

• 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 operation
A710 level for restart
611 Acceleration time at a
F003 restart
*1 The coasting time when Pr.57 = "0" is as shown below. (When Pr.162 and 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
• 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".
• 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.
 Automatic restart after instantaneous power failure function
Power
ON
supply
IPF
OFF
 10 to 100 ms for IP55 compatible models
• The inverter output is shut off at the activation of the Instantaneous power failure (E.IPF) or Undervoltage (E.UVT). (Refer
to page 754 for E.IPF or E.UVT.)
• When E.IPF or E.UVT is activated, the Instantaneous power failure/undervoltage (IPF) signal is output.
598
5. PARAMETERS
5.14 (A) Application parameters
Initial Setting
value range
0
1
2
3
0
10
11
12
13
0
1
0
9999
0
9999
0.1 to 30 s
9999
1 s 0 to 60 s
0 s 0 to 20 s
0% 0 to 100%
150% 0 to 400%
0 to 3600 s
9999
9999

15 to 100 ms
OFF
ON
Frequency search only performed at the first start
Reduced voltage start only at the first start
(no frequency search)
Encoder detection frequency search
Frequency search only performed at the first start (reduced impact restart)
Frequency search at every start
Reduced voltage start at every start (no frequency search)
Encoder detection frequency search at every start
Frequency search at every start (reduced impact restart)
Without rotation direction detection
With rotation direction detection
When Pr.78 Reverse rotation prevention selection = "0", with rotation
direction detection
When Pr.78 Reverse rotation prevention selection= "1 or 2", without
rotation direction detection
Coasting time differs according to the inverter capacity.
Set the waiting time for the inverter to perform a restart after restoring power
due to an instantaneous power failure.
No restart
Set the voltage cushion time for restart.
Set the voltage cushion time for restart.
Consider this matched to the size of the load amount (moment of inertia/
torque).
Set the stall prevention level at restart operation on the assumption that the
inverter rated current is 100%.
Set the acceleration time to reach Pr.20 Acceleration/deceleration
reference frequency at restart.
Standard acceleration time (for example, Pr.7) is applied as the acceleration
time at restart.
Description
*1