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

Setting of acceleration/deceleration
time and acceleration/deceleration
3.6 Setting of acceleration/deceleration time and
acceleration/deceleration pattern
Purpose
Motor acceleration/deceleration time
setting
Starting frequency
Set acceleration/deceleration pattern
suitable for application
3.6.1

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.
Pr.6
Set a larger value for a slower speed increase/decrease or a smaller value for a faster speed increase/
page 67
Pr. 9
decrease.
page 78
For the acceleration time at automatic restart after instantaneous power failure, refer to Pr. 611 Acceleration
Pr.19
time at a restart (page 109).
page 64
Pr.22
page 56 Parameter
Pr.43
Number
page 95
Pr.46
page 53
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 140)
*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
(50Hz)
Acceleration
Pr.7
time
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
74
Acceleration/deceleration times
Starting frequency and start-
time hold
Acceleration/deceleration
pattern and back lash measures
Name Initial Value
00170 or
less
00250 or
more
00170 or
less
00250 or
more
50Hz
0
5s
9999
(1) Acceleration time setting (Pr.7, Pr.20)
⋅ Use Pr. 7 Acceleration time to set the acceleration time required to reach
Running
Pr. 20 Acceleration/deceleration reference frequency from 0Hz.
frequency
⋅ Set the acceleration time according to the following formula.
Acceleration
Time
time setting
Deceleration
Pr.8
time
Parameter that must be set
Setting Range
5s
0 to 3600/ 360s
*2
15s
10s
0 to 3600/ 360s
*2
30s
1 to 400Hz
0
1
0 to 3600/360s
*2
0 to 3600/360s
*2
9999
Pr.20
=
Maximum operating
frequency - Pr. 13
Pr.7, Pr.8, Pr.20, Pr.21,
Pr.44, Pr.45
Pr.13, Pr.571
Pr.29, Pr.140 to Pr.143
Description
Set the motor acceleration time.
Set the motor deceleration time.
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 Increments and
Range: 0 to 3600s setting range of
acceleration/
deceleration time
Increments: 0.01s
setting can be
Range: 0 to 360s
changed.
Set the acceleration/deceleration time
when the RT signal is on.
Set the deceleration time when the RT
signal is on.
Acceleration time = deceleration time
Acceleration time from stop to
×
maximum operating frequency
50Hz
× 10s
Pr.7 =
40Hz - 0.5Hz
Refer to page
74
76
77
12.7s