167
Setting of acceleration/deceleration time
and acceleration/deceleration pattern
4
PARAMETERS
4.12 Setting of acceleration/deceleration time and
acceleration/deceleration pattern
4.12.1 Setting of the acceleration and deceleration time (Pr. 7, Pr. 8, Pr. 20, Pr. 21,
Pr. 44, Pr. 45, Pr. 110, Pr. 111)
Purpose Parameter that must be Set Refer to Page
Motor acceleration/deceleration time
setting
Acceleration/deceleration time
Pr. 7, Pr. 8, Pr. 20, Pr. 21,
Pr. 44, Pr. 45, Pr. 110, Pr. 111
167
Starting frequency
Starting frequency and start-
time hold
Pr. 13, Pr. 571 169
Set acceleration/deceleration pattern
suitable for application
Acceleration/deceleration
pattern and backlash measures
Pr. 29, Pr. 140 to Pr. 143,
Pr. 380 to Pr. 383,
Pr. 516 to Pr. 519
170
Automatically set appropriate
acceleration/deceleration time
Automatic acceleration/
deceleration
Pr. 61 to Pr. 63, Pr. 292 173
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.
For the acceleration time at automatic restart after instantaneous power failure, refer to Pr. 611 Acceleration time at
a restart (page 254).
Parameter
Number
Name Initial Value Setting Range Description
7 Acceleration time
00250 or less 5s
0 to 3600/360s *1 Set the motor acceleration time.
00310 or more 15s
8 Deceleration time
00250 or less 5s
0 to 3600/360s
*1 Set the motor deceleration time.
00310 or more 15s
20
Acceleration/
deceleration
reference frequency
50Hz 1 to 400Hz
Set the frequency that will be the basis of
acceleration/deceleration time.
As acceleration/deceleration time, set the
frequency change time from stop to Pr. 20.
21
Acceleration/
deceleration time
increments
0
0
Increments: 0.1s
Range: 0 to 3600s
Increments and setting
range of acceleration/
deceleration time
setting can be
changed.
1
Increments: 0.01s
Range: 0 to 360s
44
Second
acceleration/
deceleration time
5s 0 to 3600/360s
*1
Set the acceleration/deceleration time when
the RT signal is on.
45
Second
deceleration time
9999
0 to 3600/360s
*1
Set the deceleration time when the RT
signal is on.
9999 Acceleration time = deceleration time
110
Third acceleration/
deceleration time
9999
0 to 3600/360s
*1
Set the acceleration/deceleration time when
the X9 signal is on.
9999
Without the third acceleration/deceleration
function.
111
Third deceleration
time
9999
0 to 3600/360s
*1
Set the deceleration time when the X9
signal is on.
9999 Acceleration time = deceleration time
*1 Depends on the Pr. 21 Acceleration/deceleration time increments setting. The initial value for the setting range is "0 to 3600s" and the setting
increments is "0.1s".
(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 frequency from 0Hz.
⋅ Set the acceleration time according to the following formula.
Example) When Pr. 20 = 50Hz (initial value), Pr. 13 = 0.5Hz, and acceleration
can be made up to the maximum operating frequency of 40Hz in 10s
Running
frequenc
Acceleration
time
Deceleration
time
Time
Pr.20
Pr.7
Pr.8
Output
frequency
(Hz)
Pr.110
Pr.111
Pr.44
Pr.45
(50Hz)
Acceleration
time setting
=
Pr. 20
×
Acceleration time from stop to
maximum operating frequency
Maximum operating
frequency - Pr. 13
Pr. 7 =
50Hz
×
10s 12.7s
40Hz - 0.5Hz
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