Mitsubishi Electric FR-A800 Series Instruction Manual page 635

• To enable restart operation, set "0" to Pr.57 Restart coasting time. If "0" is set to Pr.57, the coasting time is automatically
set to the following number of seconds. Generally, this setting does not interfere with inverter operation.
00046
(0.4K)
Pr.570 Pr.162
setting setting
00023
(0.4K)
Other
than 3,
0.5
13, 1003,
0 (SLD),
1013
1 (LD)
3, 13,
1003, 1
1013
Other
than 3,
0.5
13, 1003,
1013
2 (ND)
3, 13,
1003, 1
1013
Other
than 3,
0.5
13, 1003,
1013
3 (HD)
3, 13,
1003, 1
1013
Interruption > Pr.57 setting
Power supply
(R/L1、S/L2、T/L3)
Inverter output
frequency f (Hz)
• Inverter operation is sometimes hindered by the size of the moment of inertia (J) of the load, output frequency, or the
residual magnetic flux in the motor. Adjust this coasting time within the range 0.1 to 30 seconds to match the load
specification.
• Set 3 seconds or more time delay when the sine wave filter is used (Pr.72 PWM frequency selection = "25").
NOTE
• Note that the coasting time setting is different from that of the FR-A700 series inverter. (Refer to
 Restart cushion time (Pr.58)
• The cushion time is the time taken to raise the voltage to the level required for the specified speed after the motor speed
detection (output frequency before the instantaneous power failure when Pr.162 = "1, 11, 1001, or 1011").
• Normally, the motor runs at the initial value as it is. However, adjust to suit the moment of inertia (J) of the load or the size
of the torque.
NOTE
• Pr.58 is invalid under Real sensorless vector control or Vector control.
634
5. PARAMETERS
5.14 (A) Application parameters
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00077 00105 00167 00250 00340
(0.75K) (1.5K) (2.2K) (3.7K) (5.5K)
00038 00052 00083 00126 00170
(0.75K) (1.5K) (2.2K) (3.7K) (5.5K)
0.5 1 1 1 1
1 2 2 2 2
0.5 0.5 1 1 1
1 1 2 2 2
0.5 0.5 0.5 1 1
1 1 1 2 2
Instantaneous power failure
(interruption) time
Coasting time
Pr.57 setting
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200 V class FR-A820-[]
00490 00630 00770 00930 01250
(7.5K) (11K) (15K) (18.5K) (22K)
400 V class: FR-A840-[]
00250 00310 00380 00470 00620
(7.5K) (11K) (15K) (18.5K) (22K)
3 3 3 3 3
3 3 3 3 3
1 3 3 3 3
2 3 3 3 3
1 1 3 3 3
2 2 3 3 3
Interruption ≤ Pr.57 setting
Power supply
(R/L1、S/L2、T/L3)
Inverter output
frequency f (Hz)
Coasting time
Pr.57 setting
01540 01870 02330 03160
(30K) (37K) (45K) (55K)
00770 00930 01160 01800
(30K) (37K) (45K) (55K)
3 3 3 5 5
3 3 3 5 5
3 3 3 3 5
3 3 3 3 5
3 3 3 3 3
3 3 3 3 3
Instantaneous power failure
(interruption) time
page 856.)
03800 04750
(75K) (90K)
02600
02160
(90K) or
(75K)
higher
5
5
5
5
5
5