Power Failure-Time Deceleration-To-Stop Function (Pr. 261 To Pr. 266 ) - Mitsubishi Electric F700 Instruction Manual

Operation selection at power failure
and instantaneous power failure

4.12.2 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.
Parameter
Name
Number
Power failure stop
261
selection
Subtracted frequency at
262
deceleration start
Subtraction starting
263
frequency
Power-failure deceleration
264
time 1
Power-failure deceleration
265
time 2
Power failure deceleration
266
time switchover frequency
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 156)
* 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"
Power supply
Remove the jumper
Connect terminals
R1/L11 and P/+
and terminals
S1/L21 and N/-.
Power supply
Output
Subtracted
frequency
frequency at
Power-failure
deceleration start
Pr.262
deceleration
time switchover
frequency
Pr.266
Pr.261 = 1
Power
supply
During deceleration at
occurrence of power failure
During stop at
occurrence of
power failure
STF
Y46
Turn off STF once to make acceleration again
130
Initial
Setting Range
Value
0
1
0
2
3Hz 0 to 20Hz
0 to 120Hz
60Hz
9999
5s 0 to 3600/ 360s *
0 to 3600/ 360s *
9999
9999
60Hz 0 to 400Hz
(1) Connection and parameter setting
⋅ Remove the jumpers across terminals R/L1-R1/L11 and
Inverter
R/L1
across terminals S/L2-S1/L21, and connect terminals R1/
S/L2
L11 and P/+ and terminals S1/L21 and N/-.
T/L3
⋅ When Pr. 261 is set to "1" or "2", the inverter decelerates to a
R1/L11
S1/L21
stop if an undervoltage or power failure occurs.
P/+
(2) Operation outline of deceleration to stop at
N/−
⋅ If an undervoltage or power failure occurs, the output
frequency is dropped by the frequency set in Pr. 262 .
⋅ Deceleration is made in the deceleration time set in Pr. 264.
Pr.264
(The deceleration time setting is the time required from Pr. 20
Power-failure
deceleration time 1
Acceleration/deceleration reference frequency to a stop.)
Pr.265
⋅ When the frequency is low and enough regeneration energy
Power-failure
is not provided, for example, the deceleration time (slope)
deceleration
time 2
from Pr. 265 to a stop can be changed.
Time
(3) 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.
REMARKS
Power supply
Time
⋅
When automatic restart after instantaneous power failure is selected (Pr.
≠
57 "9999"), deceleration to stop function is invalid and the restart after
instantaneous power failure operation is performed.
⋅
After a power failure stop, the inverter will not start if the power supply is switched
on with the start signal (STF/STR) input. After switching on the power supply, turn
off the start signal once and then on again to make a start.
Coasting to stop
When undervoltage or power failure occurs, the inverter
output is shut off.
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.
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).
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.
power failure
ON
Not started as inverter
is stopped due to power
failure
STF
OFF
Y46
Description
Output
frequency
Time
ON