Setting Of Acceleration/Deceleration Time And Acceleration/Deceleration Pattern; Setting Of The Acceleration And Deceleration Time; 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) - Mitsubishi Electric FR-F720P-0.75K to 110K Instruction Manual

4.8 Setting of acceleration/deceleration time and
acceleration/deceleration pattern
Purpose
Motor acceleration/deceleration time
setting
Starting frequency
Set acceleration/deceleration pattern
suitable for application
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)
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
Name
Number
7 Acceleration time
8 Deceleration time
Acceleration/
deceleration
20
*1
reference frequency
Acceleration/
deceleration time
21
*1
increments
Second
acceleration/
44
*1
deceleration time
Second
45
*1
deceleration time
Acceleration/
deceleration time
147
*1
switching
frequency
791
Acceleration time in
low-speed range
IPM IPM IPM
792
Deceleration time in
low-speed range
IPM IPM IPM
*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)
Parameter that must be set
Acceleration/deceleration times
Starting frequency and start-
time hold
Acceleration/deceleration
pattern and backlash measures
Initial Value Setting Range
7.5K or lower 5s
0 to 3600/ 360s
11K or higher
15s
7.5K or lower
10s
0 to 3600/ 360s
11K or higher
30s
60Hz 1 to 400Hz
*3
0
5s 0 to 3600/360s
0 to 3600/360s
9999
0 to 400Hz
9999
0 to 3600/360s
9999
0 to 3600/360s
9999
Setting of acceleration/deceleration time
and acceleration/deceleration pattern
Pr.7, Pr.8, Pr.20, Pr.21,
Pr.44, Pr.45, Pr. 147, Pr.791,
Pr.792
Pr.13, Pr.571
Pr.29, Pr.140 to Pr.143
Description
Set the motor acceleration time.
*2
Set the motor deceleration time.
*2
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.
Increments: 0.1s
0
Range: 0 to 3600s
Increments: 0.01s
1
Range: 0 to 360s
Set the acceleration/deceleration time when
*2
the RT signal is on.
Set the deceleration time when the RT
*2
signal is on.
9999 Acceleration time = deceleration time
The frequency where the acceleration/
deceleration time switches to the time set in
Pr.44 and Pr.45.
9999 No function
Acceleration time in the low-speed range
(rated motor frequency/10 or lower) is set.
9999 The acceleration time set in
Deceleration time in the low-speed range
(rated motor frequency/10 or lower) is set.
9999 The deceleration time set in
Refer to page
109
113
115
Increments and setting
range of acceleration/
deceleration time
setting can be
changed.
Pr.7 is applied.
is applied.
Pr.8
109
4