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Acceleration/deceleration Pattern; Pr. 516 To Pr. 519); Acceleration/deceleration Pattern (pr. 29, Pr. 140 To Pr. 143, Pr. 380 To Pr. 383, Pr. 516 To Pr. 519) - Mitsubishi Electric FR-A740-00023 Instruction Manual

Fr-a700 series.
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Setting of acceleration/deceleration time
and acceleration/deceleration pattern
4.12.3 Acceleration/deceleration pattern (Pr. 29, Pr. 140 to Pr. 143, Pr. 380 to Pr. 383,

Pr. 516 to Pr. 519)

You can set the acceleration/deceleration pattern suitable for application.
You can also set the backlash measures that stop acceleration/deceleration once at the parameter-set frequency
and time during acceleration/deceleration.
Parameter
Number

Acceleration/deceleration pattern

29
selection
140
Backlash acceleration stopping frequency
141
Backlash acceleration stopping time
142
Backlash deceleration stopping frequency
143
Backlash deceleration stopping time
380
Acceleration S-pattern 1
381
Deceleration S-pattern 1
382
Acceleration S-pattern 2
383
Deceleration S-pattern 2
516
S-pattern time at a start of acceleration
S-pattern time at a completion of
517
acceleration
518
S-pattern time at a start of deceleraiton
S-pattern time at a completion of
519
deceleraiton
Setting value "0"
[Linear acceleration
/ deceleration]
Time
Setting value "1"
[S-pattern acceleration
/deceleration A]
fb
Time
CAUTION
⋅ As the acceleration/deceleration time of S-pattern acceleration/deceleration A, set the time taken until Pr. 3 Base frequency is
reached, not Pr. 20 Acceleration/deceleration reference frequency.
170
Name
(1) Linear acceleration/ deceleration (Pr. 29 = "0", initial value)
⋅ When the frequency is changed for acceleration, deceleration, etc. in inverter
operation, the output frequency is changed linearly (linear acceleration/
deceleration) to reach the set frequency without straining the motor and inverter.
Linear acceleration/deceleration has a uniform frequency/time slope.
(2) S-pattern acceleration/deceleration A (Pr. 29 = "1")
⋅ For machine tool spindle applications, etc.
Used when acceleration/deceleration must be made in a short time to a high-
speed range of not lower than the base frequency. In this acceleration/
deceleration pattern, Pr. 3 Base frequency (fb) is the inflection point of the S
pattern and you can set the acceleration/deceleration time appropriate for motor
torque reduction in a constant-power operation region of Pr. 3 Base frequency
(initial value = 50Hz) or higher.
Initial
Setting
Value
Range
0
Linear acceleration/ deceleration
1
S-pattern acceleration/deceleration A
2
S-pattern acceleration/deceleration B
0
3
Backlash measures
4
S-pattern acceleration/deceleration C
5
S-pattern acceleration/deceleration D
1Hz
0 to 400Hz
Set the stopping frequency and time for
0.5s
0 to 360s
backlash measures.
1Hz
0 to 400Hz
Valid when Pr. 29 = 3
0.5s
0 to 360s
0
0 to 50%
Valid when S-pattern acceleration/
deceleration C (Pr. 29 = 4) is set.
Set the time taken for S-pattern from
0
0 to 50%
starting of acceleration/deceleration to
linear acceleration as % to the
acceleration/deceleration time (Pr. 7, Pr. 8
0
0 to 50%
etc.).
An acceleration/deceleration pattern can
be changed with the X20 signal.
0
0 to 50%
0.1s
0.1 to 2.5s
Valid when S-pattern acceleration/
0.1s
0.1 to 2.5s
deceleration D (Pr. 29 = 5) is set.
Set the time taken for S-pattern
0.1s
0.1 to 2.5s
acceleration/deceleration (S-pattern
operation).
0.1s
0.1 to 2.5s
Description

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