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 FR-F720-00046 Instruction Manual

Setting of acceleration/deceleration time
and acceleration/deceleration pattern
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 142).
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 179)
*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
Deceleration
Acceleration
time time
Example) How to find the setting value for Pr.7 when increasing the output
frequency to the maximum frequency of 50Hz in 10s with Pr.20 =
60Hz (initial setting) and Pr.13 = 0.5Hz.
96
Acceleration/deceleration times
Starting frequency and start-
time hold
Acceleration/deceleration
pattern and backlash measures
Initial Value
200V class (400V class)
00340
(00170) or less
00490
(00250) or more
00340
(00170) or less
00490
(00250) or more
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
Parameter that must be set
Pr.7, Pr.8, Pr.20, Pr.21,
Pr.29, Pr.140 to Pr.143
Setting Range
5s
0 to 3600/ 360s Set the motor acceleration time.
*2
15s
10s
0 to 3600/ 360s Set the motor deceleration time.
*2
30s
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
Pr.44, Pr.45
Pr.13, Pr.571
Description
Increments and
setting range of
acceleration/
deceleration time
setting can be
changed.
Acceleration time from stop to
×
maximum operating frequency
60Hz
× 10s
50Hz - 0.5Hz
96
98
99
12.1s