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, Pr. 110, Pr. 111) - Mitsubishi Electric FR-A740-00023 Instruction Manual

4.12 Setting of acceleration/deceleration time and
acceleration/deceleration pattern
Purpose
Motor acceleration/deceleration time
setting
Starting frequency
Set acceleration/deceleration pattern
suitable for application
Automatically set appropriate
acceleration/deceleration time
4.12.1 Setting of the acceleration and deceleration time (Pr. 7, Pr. 8, Pr. 20, Pr. 21,
Pr. 44, Pr. 45, Pr. 110, Pr. 111)
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 254).
Parameter
Name
Number
7 Acceleration time
8 Deceleration time
Acceleration/
20 deceleration
reference frequency
Acceleration/
21 deceleration time
increments
Second
44 acceleration/
deceleration time
Second
45
deceleration time
Third acceleration/
110
deceleration time
Third deceleration
111
time
*1 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 Deceleration
time
time Pr.44
Pr.110
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
Parameter that must be Set
Acceleration/deceleration time
Starting frequency and start-
time hold
Acceleration/deceleration
pattern and backlash measures
Automatic acceleration/
deceleration
Initial Value
00250 or less 5s
00310 or more 15s
00250 or less 5s
00310 or more 15s
50Hz
0
5s
9999
9999
9999
(1) Acceleration time setting (Pr. 7, Pr. 20)
⋅ Use Pr. 7 Acceleration time to set the acceleration time required to reach Pr.
Running
frequency
20 Acceleration/deceleration reference frequency from 0Hz.
⋅ Set the acceleration time according to the following formula.
Time Acceleration
time setting
Pr.8
Pr.45
Pr.111
Setting of acceleration/deceleration time
and acceleration/deceleration pattern
Pr. 7, Pr. 8, Pr. 20, Pr. 21,
Pr. 44, Pr. 45, Pr. 110, Pr. 111
Pr. 13, Pr. 571
Pr. 29, Pr. 140 to Pr. 143,
Pr. 380 to Pr. 383,
Pr. 516 to Pr. 519
Pr. 61 to Pr. 63, Pr. 292
Setting Range
0 to 3600/360s Set the motor acceleration time.
*1
0 to 3600/360s Set the motor deceleration time.
*1
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 when
0 to 3600/360s
*1
the RT signal is on.
Set the deceleration time when the RT
0 to 3600/360s
*1
signal is on.
9999 Acceleration time = deceleration time
Set the acceleration/deceleration time when
0 to 3600/360s
*1
the X9 signal is on.
Without the third acceleration/deceleration
9999
function.
Set the deceleration time when the X9
0 to 3600/360s
*1
signal is on.
9999 Acceleration time = deceleration time
Pr. 20
×
=
Maximum operating
frequency - Pr. 13
Pr. 7 =
Refer to Page
167
169
170
173
Description
Increments and setting
range of acceleration/
deceleration time
setting can be
changed.
Acceleration time from stop to
maximum operating frequency
50Hz
× 10s
12.7s
40Hz - 0.5Hz
167
4