Mitsubishi Electric FR-F800, Instruction Manual

Page: 577 / 834

Parameters (A) Application parameters
FR-F800 5 - 415
Adjustment of restart coasting time (Pr. 57)
●
Coasting time is the time from the motor speed detection to the restart operation start.
●
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 value. Generally, this setting does not interfere with
inverter operation.
●
Inverter operation is sometimes hindered by the size of the moment of inertia (J) of the load or
running frequency. Adjust this coasting time within the range 0.1 s to 30 s to match the load
specification.
●
Set the waiting time when the sine wave filter is used (Pr. 72 "PWM frequency selection" = "25")
to 3 s or more.
Restart cushion time (Pr. 58)
●
The cushion time is the time takes to raise the voltage to the level required for the specified speed
after the motor speed detection (output frequency before instantaneous power failure when
Pr. 162 = "1 or 11").
●
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.
Pr. 162
setting
200 V class FR-F820-
00046 00077 00105 00167 00250 00340 00490 00630 00770 00930 01250 01540 01870 02330 03160
(0.75K) (1.5K) (2.2K) (3.7K) (5.5K) (7.5K) (11K) (15K) (18.5K) (22K) (30K) (37K) (45K) (55K) (75K) or
higher
400 V class FR-F840-
00023 00038 00052 00083 00126 00170 00250 00310 00380 00470 00620 00770 00930 01160 01800
(0.75K) (1.5K) (2.2K) (3.7K) (5.5K) (7.5K) (11K) (15K) (18.5K) (22K) (30K) (37K) (45K) (55K) (75K) or
higher
Other than
3, 13
0.5 1 3 5
3, 13 1 2 3 5
Tab. 5-204: Restart waiting time