MITSUBISHI ELECTRIC FR-S520 - Manual (Page 80)

71
2
2
.3.14 Acceleration/deceleration pattern
Set the acceleration/deceleration pattern.
Out
p
ut
fr
eq
uenc
y (Hz
)
fb
Time
[S-shaped
acceleration/deceleration A]
Set value 1
f1
f2
Out
p
ut
fr
eq
uenc
y (Hz
)
[S-shaped
acceleration/deceleration B]
Set value 2
Time
Set value 0
Time
Out
p
ut
fr
eq
uenc
y (Hz
)
[Linear
acceleration/deceleration]
Parameter Name
Factory
Setting
Setting
Range
Remarks
29
Acceleration/
deceleration
pattern
0 0, 1, 2 Setting is enabled when Pr. 30 = "1".
<Setting>
Pr. 29
Setting
Function Description
0
Linear
acceleration/
deceleration
Acceleration is made to the set frequency linearly.
(Factory setting)
1
S-shaped
acceleration/
deceleration A (*)
For machine tool spindle applications, etc.
Used when acceleration/deceleration must be made in a short
time to a high-speed region of not lower than the base frequency.
Acceleration/deceleration is made in a pattern where fb (base
frequency) acts as the inflection point of an S shape, and you can
set the acceleration/deceleration time which matches the motor
torque reduction in the constant-output operation region of not
lower than the base frequency.
2
S-shaped
acceleration/
deceleration B
For conveyor and other load collapse prevention applications, etc.
Since acceleration/deceleration is always made in an S shape
from f2 (current frequency) to f1 (target frequency), this function
eases shock produced at acceleration/deceleration and is
effective for load collapse prevention, etc.
CAUTION
* As the acceleration/deceleration time, set the time taken to reach the Pr. 3 "base
frequency" value, not the Pr. 20 "acceleration/deceleration reference frequency"
value. For details, refer to page 59.
♦ ♦ ♦ ♦
Related parameters
♦ ♦ ♦ ♦
Base frequency (acceleration/deceleration time setting) setting
⇒
Pr. 3 "base frequency"
(refer to page 59)
For setting of "1" (S-shaped acceleration/deceleration A)
⇒
Pr. 44 "second acceleration/deceleration time", Pr. 45 "second deceleration time" (refer to
page 62)