Setting Of Acceleration/Deceleration Time And Acceleration/Deceleration Pattern; Setting Of The Acceleration And Deceleration Time (Pr.7, Pr.8, Pr.20, Pr.21, Pr.44, Pr.45) - Mitsubishi Electric F700 Instruction Manual

4.7 Setting of acceleration/deceleration time and
acceleration/deceleration pattern
Purpose
Motor acceleration/deceleration time
setting
Starting frequency
Set acceleration/deceleration pattern
suitable for application
4.7.1

Setting of the acceleration and deceleration time (Pr.7, Pr.8, Pr.20, Pr.21, Pr.44, Pr.45)

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 126).
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
*1 The parameters can be set when Pr. 160 User group read selection = "0" (Refer to page 156)
*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".
Pr.20
(60Hz)
Pr.7
Acceleration Deceleration
time
time
Example) When Pr. 20 = 60Hz (initial value), Pr. 13 = 0.5Hz, and
acceleration can be made up to the maximum operating
frequency of 50Hz in 10s
Acceleration/deceleration times
Starting frequency and start-
time hold
Acceleration/deceleration
pattern and back lash measures
Initial Value
7.5K or less
5s
11K or more 15s
7.5K or less
10s
11K or more
30s
60Hz
0
5s
9999
(1) Acceleration time setting (Pr.7, Pr.20)
⋅ Use Pr. 7 Acceleration time to set the acceleration time required to reach Pr.
Running
20 Acceleration/deceleration reference frequency from 0Hz.
frequency
⋅ Set the acceleration time according to the following formula.
Acceleration
Time
time setting
Pr.8
Setting of acceleration/deceleration time
and acceleration/deceleration pattern
Parameter that must be set
Pr.7, Pr.8, Pr.20, Pr.21,
Pr.44, Pr.45
Pr.13, Pr.571
Pr.29, Pr.140 to Pr.143
Setting Range
0 to 3600/ 360s Set the motor acceleration time.
*2
0 to 3600/ 360s Set the motor deceleration time.
*2
Set the frequency that will be the basis of
acceleration/deceleration time.
1 to 400Hz
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
0 to 3600/360s
*2
when the RT signal is on.
Set the deceleration time when the RT
0 to 3600/360s
*2
signal is on.
9999 Acceleration time = deceleration time
Pr.20
=
Maximum operating
frequency - Pr. 13
Pr.7 =
Refer to page
91
93
94
Description
Increments and
setting range of
acceleration/
deceleration time
setting can be
changed.
Acceleration time from stop to
×
maximum operating frequency
60Hz
× 10s
12.1s
50Hz - 0.5Hz
4
91