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PARAMETERS
74
Pr. 3 "base frequency"
Pr. 7 "acceleration time"
Pr. 8 "deceleration time"
Pr. 20 "acceleration/deceleration
reference frequency"
Pr. 44 "second
acceleration/deceleration time"
Pr. 45 "second deceleration
time"
Related parameters
"
" Acceleration/deceleration pattern (Pr. 29)
4.2.11 Acceleration/deceleration pattern (Pr. 29)
Pr. 29 "acceleration/deceleration pattern"
Set the acceleration/deceleration pattern.
Parameter
Number
Factory
Setting
Setting
Range
29 0 0, 1, 2
[Linear acceleration/deceleration]
Time
Set value 0
Output
frequency(Hz)
fb
Time
[S-shaped
acceleration/deceleration A]
Set value 1
Output
frequency(Hz)
f1
Time
f2
[S-shaped
acceleration/deceleration B]
Set value 2
Output
frequency(Hz)
<Setting>
Pr. 29 Setting Function Description
0
Linear
acceleration/
deceleration
Linear acceleration/deceleration is made up/down to the
preset frequency (factory setting).
1
S-shaped
acceleration/
deceleration
A
(Note)
For machine tool spindles
This setting is used when it is necessary to make
acceleration/deceleration in a short time up to the base
frequency or higher speed range.
In this acceleration/deceleration pattern, fb (base frequency)
is always the inflection point of an S shape, and you can set
the acceleration/deceleration time according to the reduction
in motor torque in the base frequency or higher constant-
output operation range.
2
S-shaped
acceleration/
deceleration
B
For prevention of cargo collapse on conveyor, etc.
This setting provides S-shaped acceleration/deceleration
from f2 (current frequency) to f1 (target frequency), easing
an acceleration/deceleration shock. This pattern has an
effect on the prevention of cargo collapse, etc.
Note: For the acceleration/deceleration time, set the time required to reach the
"base frequency" in Pr. 3, not the "acceleration/deceleration reference
frequency" in Pr. 20. For details, refer to Pr. 7 and Pr. 8.
4