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indicates simple mode parameters and indicates extended parameters. When setting parameters, refer to the instruction manual (applied) and understand instructions.
Pr.
Pr.
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.
* When the setting of Pr. 21 Acceleration/deceleration time increments is "0"
(initial value), the setting range is "0 to 3600s" and the 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"
(1) Power failure stop mode (Pr.261 = “1”)
⋅ If power is restored during power failure deceleration,
deceleration to a stop is continued and the inverter remains
stopped.To restart, turn off the start signal once, then turn it
on again.
(2) Instantaneous power failure-time operation
continuation function (Pr.261 = “2”)
⋅ When power is restored during deceleration after an
instantaneous 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 ≠ "9999")
Operation at instantaneous
power failure
Pr.261 Power failure stop selection
Pr.262 Subtracted frequency at deceleration start
Pr.263 Subtraction starting frequency Pr.264 Power-failure deceleration time 1
Pr.265 Power-failure deceleration time 2
Pr.266 Power failure deceleration time switchover frequency
Pr.
Number
Setting Range Description
261
0 (initial value)
Coasting to stop
When undervoltage or power failure
occurs, the inverter output is shut off.
1
When undervoltage or a power failure
occurs, the inverter can be decelerated
to a stop.
2
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.
262 0 to 20Hz
Normally operation can be performed
with the initial value unchanged. But
adjust the frequency according to the
magnitude of the load specifications
(moment of inertia, torque).
263
0 to 120Hz
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
9999
Decelerate from the speed obtained
from output frequency minus Pr. 262.
264 0 to 3600/ 360s *
Set a deceleration slope down to the
frequency set in Pr. 266.
265
0 to 3600/ 360s *
Set a deceleration slope below the
frequency set in Pr. 266.
9999 Same slope as in Pr. 264
266 0 to 400Hz
Set the frequency at which the
deceleration slope is switched from the
Pr. 264 setting to the Pr. 265 setting.
Pr.
261 to 26
6
Pr.264
Power-failure
deceleration time 1
Pr.265
Power-failure
deceleration
time 2
Time
Power supply
Output
frequency
Subtracted
frequency at
deceleration start
Pr.262
Power-failure
deceleration
time switchover
f
requency
P
r.266
267
Refer to the section about Pr. 73 and other
relevant parameters.
268
Refer to the section about Pr. 52 and other
relevant parameters.
269
Parameter for manufacturer setting. Do not set.
299
Refer to the section about Pr. 57 and other
relevant parameters.
331 to 337
Refer to the section about Pr. 117 and
other relevant parameters.
During deceleration at
occurrence of power failure
During stop at
occurrence of
power failure
STF
Y46
Time
Turn off STF once to make acceleration again
Power
supply
Output frequency
Pr.261 = 1
IPF
Power
supply
Time
Output
frequency
Y46
During deceleration
at occurrence of
power failure
Reacceleration
When power is restored during
deceleration
Pr.261 = 2
During power failure
Power
supply
Output
frequency
Y46
During deceleration
at occurrence of
power failure
Automatic restart
after instantaneous
power failure
Reset time + Pr.57
Pr.261 = 2, Pr.57 9999
When used with automatic restart
after instantaneous power failure
Time
Pr.
Pr.
Pr.
Pr.
Pr.