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Setting of acceleration/deceleration time
and acceleration/deceleration pattern
4
PARAMETERS
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.21,
Pr.44, Pr.45, Pr.147, Pr.791, Pr.792)
Purpose Parameter that must be set Refer to page
Motor acceleration/deceleration time
setting
Acceleration/deceleration times
Pr.7, Pr.8, Pr.20, Pr.21,
Pr.44, Pr.45, Pr. 147, Pr.791,
Pr.792
109
Starting frequency
Starting frequency and start-
time hold
Pr.13, Pr.571 113
Set acceleration/deceleration pattern
suitable for application
Acceleration/deceleration
pattern and backlash measures
Pr.29, Pr.140 to Pr.143 115
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 (refer to page 162).
Parameter
Number
Name Initial Value Setting Range Description
7 Acceleration time
7.5K or lower
5s
0 to 3600/ 360s
*2 Set the motor acceleration time.
11K or higher
15s
8 Deceleration time
7.5K or lower 10s
0 to 3600/ 360s
*2 Set the motor deceleration time.
11K or higher
30s
20
*1
Acceleration/
deceleration
reference frequency
60Hz *3 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
*1
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
*1
Second
acceleration/
deceleration time
5s 0 to 3600/360s
*2
Set the acceleration/deceleration time when
the RT signal is on.
45
*1
Second
deceleration time
9999
0 to 3600/360s
*2
Set the deceleration time when the RT
signal is on.
9999 Acceleration time = deceleration time
147
*1
Acceleration/
deceleration time
switching
frequency
9999
0 to 400Hz
The frequency where the acceleration/
deceleration time switches to the time set in
Pr.44 and Pr.45.
9999 No function
791
Acceleration time in
low-speed range
9999
0 to 3600/360s
Acceleration time in the low-speed range
(rated motor frequency/10 or lower) is set.
9999 The acceleration time set in Pr.7 is applied.
792
Deceleration time in
low-speed range
9999
0 to 3600/360s
Deceleration time in the low-speed range
(rated motor frequency/10 or lower) is set.
9999 The deceleration time set in
Pr.8 is applied.
*1 The parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 201)
*2 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".
*3 Performing IPM parameter initialization changes the settings. (Refer to page 80)
POINT
Setting Pr.999 Automatic parameter setting to "30" or "31" changes the setting increments of acceleration/
deceleration time. (Refer to page 290)
IPM
IPM
IPM
IPM
IPM
IPM