Mitsubishi Electric FR-A700 Instruction Manual page 220

Parameter overview
Parameter
Func-
Name
tion
Power failure stop
261
selection
Subtracted frequency
262
at deceleration start
Subtraction starting
263
frequency
Power-failure
264
deceleration time 1
Power-failure
265
deceleration time 2
Power failure
266 deceleration time
switchover frequency
UV avoidance voltage
294
gain
Tab. 6-1: Parameter overview (40)
6 - 40
Incre- Initial Setting
ments Value Range
0
1
11
1 0
2
12
0.01Hz 3Hz 0–20Hz
0–120Hz
0.01Hz 50Hz
9999
0.1/ 0–3600/
5s
0.01s 360s
0–3600/
0.1/
360s
9999
0.01s
9999
0.01Hz 50Hz 0–400Hz
0.1% 100% 0–200%
Description
Coasting to stop
When under voltage or power fail-
ure occurs, the inverter output is
shut off.
Without UV When under volt-
avoidance age or a power
failure occurs, the
inverter can be
With UV
decelerated to a
avoidance
stop.
Without UV When under volt-
avoidance age or a power
failure occurs, the
inverter can be
decelerated to a
stop. If power is
With UV
restored during a
avoidance
power failure, the
inverter acceler-
ates again.
Normally operation can be per-
formed with the initial value
unchanged. But adjust the fre-
quency according to the magni-
tude of the load specifications
(moment of inertia, torque).
When output frequency ≥ Pr. 263
Decelerate from the speed
obtained from output frequency
minus Pr. 262.
When output frequency < Pr. 263
Decelerate from output frequency
Decelerate from the speed
obtained from output frequency
minus Pr. 262.
Set a deceleration slope down to
the frequency set in Pr. 266.
Set a deceleration slope below the
frequency set in Pr. 266.
Same slope as in Pr. 264
Set the frequency at which the
deceleration slope is switched
from the Pr. 264 setting to the
Pr. 265 setting.
Adjust response level at UV avoid-
ance operation. A larger setting
will improve responsiveness to the
bus voltage change. Since the
regeneration amount is large when
the inertia is large, decrease the
setting value.
Parameter
All
Para- Para-
para-
meter meter
meter
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to
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