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8 PARAMETER FUNCTIONS
8-28
8.5.3 Acceleration/deceleration patterns
Initial value
Pr. 29 "acceleration/deceleration pattern" 0
You can change the acceleration/deceleration pattern.
Setting Name Function Time vs. Speed
0
Linear
acceleration/
deceleration
In this pattern, the speed varies with
the time constantly.
t
Time
Running
speed (r/min)
[Linear acceleration/deceleration]
1
S-shaped
acceleration/
deceleration A
In this pattern, the speed varies from
a start to the maximum speed with
the rated speed given at an
inflection point (fb).
In this setting, motor torque
reduction in a constant-output region
is taken into consideration, e.g.
application to machine tool spindles.
t
Time
Running
speed (r/min)
fb
2000
[S-shaped acceleration/deceleration A]
2
S-shaped
acceleration/
deceleration B
This pattern always ranges from the
present running speed and a newly
set speed.
Since an acceleration/deceleration
shock is eased, this pattern has an
effect on the prevention of cargo
collapse as in a conveyor.
t
f1
f2
Time
Running
speed (r/min)
[S-shaped acceleration/deceleration B]
MEMO
When Pr. 29 = 1, the acceleration/deceleration time setting reference speed is not
as set in Pr. 20 [Section 8.5.2] "acceleration/deceleration reference speed" but is
the rated speed of the motor.