Power Failure-Time Deceleration-To-Stop Function (Pr. 261 To Pr. 266) - Mitsubishi Electric FR-F740 EC Instruction Manual

Operation selection at power failure
6.11.3

Power failure-time deceleration-to-stop function (Pr. 261 to Pr. 266)

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.
Name
No.
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
The above parameters can be set when Pr. 160 = 0.
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"
6 - 162
Initial Setting
Description
Value Range
Operation at
undervoltage
or power volt-
age
0 Coasts to a stop
1 Decelerates to a stop
0
2
Decelerates to
21
a stop
22
Normally operation can be performed with the ini-
tial value unchanged. But adjust the frequency
3Hz 0–20Hz
according to the magnitude of the load specifica-
tions (moment of inertia, torque).
When output frequency ≥ Pr. 263:
Decelerate from the speed obtained from output
0–
frequency minus Pr. 262.
400Hz
When output frequency < Pr. 263:
50Hz
Decelerate from output frequency
Decelerate from the speed obtained from output
9999
frequency minus Pr. 262.
0–3600/ Set a deceleration slope down to the
5s
frequency set in Pr. 266.
360s
0–3600/ Set a deceleration slope below the
frequency set in Pr. 266.
360s
9999
9999 Same slope as in Pr. 264
Set the frequency at which the deceleration slope
0–
50Hz is switched from the Pr. 264 setting to the Pr. 265
400Hz
setting.
At power resto-
ration during Deceleration
power failure time to a sop
deceleration
—
Depends on
Pr. 262 to
Accelerates
Pr. 266 set-
again
tings
Decelerates to
Automatically
a stop
adjusts the
deceleration
Accelerates
time
again
Parameter
Parameters referred to
12 DC injection brake
operation voltage
20 Acceleration/
deceleration
reference
frequency
21 Acceleration/
deceleration time
increments
30 Regenerative
function selection
57 Restart coasting
time
190–196 Output terminal
function selection
872 Input phase loss
protection selec-
tion
Refer to
Section
6.8.1
6.6.1
6.6.1
6.8.2
6.11.1
6.9.5
6.12.3