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Operation at instantaneous power failure – MITSUBISHI ELECTRIC INVERTER FR-F700 User Manual

Page 42

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43

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 266

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
frequency
Pr.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.