Operation At Instantaneous Power Failure; Power Failure Stop Mode; Original Operation Continuation At Instantaneous Power Failure Function - Mitsubishi Electric FR-A700 Manual

Pr.
Pr.
261 to 266, 294

Operation at instantaneous power failure

Pr.261 Power failure stop selection
Pr.263 Subtraction starting frequency
Pr.265 Power-failure deceleration time 2
Pr.266 Power failure deceleration time switchover frequency
Pr.294 UV avoidance voltage gain
When a power failure or undervoltage occurs, the inverter can be
decelerated to a stop or can be decelerated and re-accelerated to
the set frequency.
Pr.
Setting Range
Number
Coasting to stop
0(initial value) When undervoltage or power failure
occurs, the inverter output is shut off.
Without UV
1
avoidance
With UV
11
avoidance
261
Without UV
2
avoidance
With UV
12
avoidance
Normally operation can be performed
with the initial value unchanged. But
262 0 to 20Hz adjust the frequency according to the
magnitude of the load specifications
(moment of inertia, torque).
When output frequency ≥ Pr.263
Decelerate from the speed obtained
0 to 120Hz from output frequency minus Pr.262.
When output frequency ≤ Pr.263
263
Decelerate from output frequency
Decelerate from the speed obtained
9999
from output frequency minus Pr. 262.
Set a deceleration slope down to the
264 0 to 3600s/360s *
frequency set in Pr.266.
Set a deceleration slope below the
0 to 3600s/360s *
frequency set in Pr.266.
265
9999 Same slope as in Pr.264
Set the frequency at which the
266 0 to 400Hz deceleration slope is switched from the
Pr.264 setting to the Pr.265 setting.
Adjust response level at UV avoidance
operation. A larger setting will improve
responsiveness to the bus voltage
294 0 to 200%
change. Since the regeneration amount
is large when the inertia is large,
decrease the setting value.
* When the setting of Pr.21 Acceleration/deceleration time increments is "0"
(initial value), the setting range is "0 to 3600s" and setting increments are
"0.1s" and when the setting is "1", the setting range is "0 to 360s" and the
setting increments are "0.01s".
Power supply
Output
Subtracted
frequency
frequency at
Power-failure deceleration start
Pr.262
deceleration
time switchover
frequency
Pr.266
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Pr.262 Subtracted frequency at deceleration start
Pr.264 Power-failure deceleration time 1
Description
When undervoltage or
a power failure occurs,
the inverter can be
decelerated to a stop.
When undervoltage or
a power failure occurs,
the inverter can be
decelerated to a stop.
If power is restored
during a power failure,
the inverter accelerates
again.
Pr.264
Power-failure
deceleration time 1
Pr.265
Power-failure
deceleration
time 2
Time
(1) Power failure stop mode (Pr.261="1" "11")
⋅
If power is restored during power failure deceleration,
deceleration to a stop is continued and the inverter
remaines stopped. To restart, turn off the start signal once,
then turn it on again.
Pr.261 = 1
Power
supply
During deceleration at
occurrence of power failure
STF
Y46
Turn off STF once to make acceleration again
(2) Original operation continuation at instantaneous
power failure function (Pr.261="2" "12")
⋅
When power is restored during deceleration after a power
failure, acceleration is made again up to the set frequency.
⋅ When this function is used in combination with the
automatic restart after instantaneous power failure
operation, deceleration can be made at a power failure
and acceleration can be made again after power
restoration.
When power is restored after a stop by deceleration at an
instantaneous power failure, automatic restart operation is
performed if automatic restart after instantaneous power
failure has been selected (Pr.57
When power is restored during
Pr.261 = 2
deceleration
Power
supply
Output
frequency
During deceleration
at occurrence of
power failure
Y46
Pr.261 = 2, Pr.57
9999
During power failure
Power
supply
Output
frequency
During deceleration
at occurrence of
power failure
Y46
Pr.
Pr.
267
Refer to the section about Pr. 73.
Pr.
Pr.
268
Refer to the section about Pr.52.
Pr.
Pr.
Parameter for manufacturer setting. Do not set.
269
During stop at
occurrence of
power failure
Time
≠
"9999")
IPF
Reacceleration
Time
When used with automatic restart
after instantaneous power failure
Automatic restart
after instantaneous
power failure
Time
Reset time + Pr.57
62