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Setting of acceleration/deceleration time and acceleration/deceleration pattern
4
PARAMETERS
4.9.3 Acceleration/deceleration pattern (Pr.29)
The above parameters can be set when Pr.160 Extended function display selection = "0". (Refer to page 182)
You can set the acceleration/deceleration pattern suitable for application.
Parameter
number
Name Initial value Setting range Description
29
Acceleration/deceleration
pattern selection
0
0 Linear acceleration/ deceleration
1 S-pattern acceleration/deceleration A
2 S-pattern acceleration/deceleration B
(1) Linear acceleration/deceleration (Pr.29 = "0", initial value)
For the drive unit operation, the speed is made to change linearly (linear
acceleration/deceleration) to prevent the motor and drive unit from excessive
stress to reach the set speed during acceleration, deceleration, etc. when speed
changes. Linear acceleration/deceleration has a uniform speed/time slope.
(2) S-pattern acceleration/deceleration A (Pr.29 = "1")
An acceleration/deceleration pattern in which the rated motor speed (3000r/min)
is the point of inflection in an S-pattern curve.
NOTE
As the acceleration/deceleration time of S-pattern acceleration/deceleration A, set the time taken until motor rated
speed is reached, not Pr.20 Acceleration/deceleration reference speed.
(3) S-pattern acceleration/deceleration B (Pr.29 = "2")
For prevention of load shifting in conveyor and other applications.
Since acceleration/deceleration is always made in an S shape from current
speed (f2) to target speed (f1), this function eases shock produced at
acceleration/deceleration and is effective for load collapse prevention, etc.
NOTE
Under position control, the acceleration/deceleration pattern selection is disabled. (The linear acceleration/
deceleration is always applied.)
Parameter referred to
Pr.7 Acceleration time, Pr.8 Deceleration time, Pr.20 Acceleration/deceleration reference speed Refer to page 125
Rotation speed (r/min)
Time
Setting value "0"
[Linear acceleration/
deceleration]
Rotation speed (r/min)
Setting value "1"
[S-pattern acceleration
/
deceleration A]
Time
3000
f1
f2
Time
Setting value "2"
[S-pattern acceleration/
deceleration B]
Rotation speed (r/min) Set speed (r/min)