97
Setting of acceleration/deceleration time and acceleration/ deceleration pattern
4.8 Setting of acceleration/deceleration time and acceleration/
deceleration pattern
4.8.1
Setting of the acceleration and deceleration time
(Pr. 7, Pr. 8, Pr. 20, Pr. 44, Pr. 45, Pr. 791, Pr. 792)
Purpose
Parameter that should be Set
Refer to Page
Motor acceleration/deceleration time
setting
Acceleration/deceleration
times
Pr. 7, Pr. 8, Pr. 20, Pr. 44, Pr. 45,
Pr. 791, Pr. 792
Set the minimum motor speed
Starting speed
Pr. 13
Set acceleration/deceleration pattern
suitable for application
Acceleration/deceleration
pattern
Pr. 29
Used to set motor acceleration/deceleration time.
Set a larger value for a slower speed increase/decrease or a smaller value for a faster speed increase/decrease.
Parameter
Number
Name
Initial
Value
Setting Range
Description
7
Acceleration time
5s
0 to 3600s
Motor acceleration time.
8
Deceleration time
5s
0 to 3600s
Motor deceleration time.
20
Acceleration/
deceleration
reference speed
3000r/min
30 to 12000r/min /
20 to 8000r/min
Speed that will be the basis of acceleration/
deceleration time.
As acceleration/deceleration time, set the speed
change time from stop to
Pr. 20
.
44
Second acceleration/
deceleration time
5s
0 to 3600s
Acceleration/deceleration time when the RT signal is
ON.
45
Second deceleration
time
9999
0 to 3600s
Deceleration time when the RT signal is ON.
9999
Acceleration time = deceleration time
791
Acceleration time in
low-speed range
9999
0 to 3600s
Acceleration time in the low-speed range (less than
300r/min)
9999
The acceleration time of
Pr. 7
792
Deceleration time in
low-speed range
9999
0 to 3600s
Deceleration time in the low-speed range (less than
300r/min)
9999
The deceleration time of
Pr. 8
The above parameters can be set when
Pr. 160 Extended function display selection
= "0".
The value left of the slash is for the 2.2K drive unit or lower. The one right of the slash is for the 3.7K drive unit.
If a value exceeding the upper speed limit of the motor is set, the actual operation will be limited at the maximum rotation speed. The setting range is for
the S-PM motor. The maximum setting value differs depending on the number of poles of the applied motor.
(1) Acceleration time setting
(Pr. 7, Pr. 20)
Use
Pr. 7
Acceleration time
to set the acceleration time required to reach
Pr. 20
Acceleration/deceleration reference speed
from 0r/min.
Set the acceleration time according to the following formula.
Acceleration
time setting
=
Pr. 20
Acceleration time from stop to
maximum operating speed
Maximum operating
speed
Example) How to find the setting value for
Pr. 7
when increasing the rotation
speed to the maximum speed of 1500r/min in 10s with
Pr. 20
= 3000r/
min (initial setting).
Pr. 7
=
3000r/min
10s = 20s
1500r/min
Running
speed
Acceleration time
Pr. 7, Pr. 44
Deceleration time
Pr. 8, Pr. 45
Time
Rotation
speed
Pr. 20
(3000r/min)
(r/min)
Содержание FR-D720-0.2K-G
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