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

3.11.2 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.
Pr. 260
page 124
Parameter
Pr. 267
Number
page 125
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 140)
* 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
Short terminals
R1/L11, S1/L21
and P/+, N/−
Power supply
Output
At the start
frequency
deceleration
Subtractiont frequency
Power-failure
Pr.262
deceleration
time switchover
frequency
Pr.266
Pr.261 = 1
STF
Y46
Turn off STF once to make acceleration again
112
Initial
Name
Value
0
3Hz
50Hz
5s
9999
50Hz
Inverter
R/L1
S/L2
T/L3
R1/L11
S1/L21
P/+
N/−
Pr.264
Power-failure
deceleration time 1
Pr.265
Power-failure
deceleration
time 2
Time
During deceleration at
occurrence of power failure
During stop at
occurrence of
power failure
Time
Setting
Range
Coasting to stop
0
When undervoltage or power failure occurs, the inverter
output is shut off.
When undervoltage or a power failure occurs, the inverter
1
can be decelerated to a stop.
When undervoltage or a power failure occurs, the inverter
can be decelerated to a stop.
2
If power is restored during a power failure, the inverter
accelerates again.
Normally operation can be performed with the initial value
0 to 20Hz
unchanged. But adjust the frequency according to the
magnitude of the load specifications (moment of inertia, torque).
When output frequency
Decelerate from the speed obtained from output
0 to 120Hz frequency minus Pr. 262.
When output frequency
Decelerate from output frequency
Decelerate from the speed obtained from output
9999
frequency minus Pr. 262.
0 to 3600/ 360s * Set a deceleration slope down to the frequency set in Pr. 266.
0 to 3600/ 360s * Set a deceleration slope below the frequency set in Pr. 266.
9999 Same slope as in Pr. 264
Set the frequency at which the deceleration slope is
0 to 400Hz
switched from the Pr. 264 setting to the Pr. 265 setting.
(1) Connection and parameter setting
⋅ Remove the jumpers across terminals R/L1-R1/L11 and
across terminals S/L2-S1/L21, and connect the terminal
R1/L11 to the terminal P/+ and the terminal S1/L21 to the
terminal N/-.
⋅ When Pr. 261 is set to "1" or "2", the inverter decelerates
to a stop if an undervoltage or power failure occurs.
(2) Operation outline of deceleration to stop at
power failure
⋅ If an undervoltage or power failure occurs, the output
frequency is dropped by the frequency set to Pr. 262 .
⋅ Deceleration is made in the deceleration time set to Pr. 264.
(The deceleration time setting is the time required from
Pr.20 Acceleration/deceleration reference frequency to a stop.)
⋅ When the frequency is low and enough regeneration
energy is not provided, for example, the deceleration
time (slope) from Pr. 265 to a stop can be changed.
(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
STF
Y46
⋅
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.
Description
Pr. 263
Pr. 263
ON
Not started as inverter Output
is stopped due to power
frequency
failure
OFF
ON