Setting Of Acceleration/Deceleration Time And Acceleration/ Deceleration Pattern; Setting Of The Acceleration And Deceleration Time (Pr. 7, Pr. 8, Pr. 20, Pr. 44, Pr. 45) - Mitsubishi Electric FR-D720-0.4K 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. 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 137).
Parameter
Name
Number
7 Acceleration time
8 Deceleration time
Acceleration/
20 ∗1
deceleration
reference frequency
Second acceleration/
44 ∗1
deceleration time
Second deceleration
45 ∗1
time
∗1
The above parameters can be set when Pr. 160 Extended function display selection = "0". (Refer to page 163)
Pr. 20
(60Hz)
Acceleration time
Deceleration time
Pr. 7, Pr. 44 Pr. 8, Pr. 45
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.
Acceleration/deceleration
times
Starting frequency and start-
time hold
Acceleration/deceleration
pattern
Initial Value
3.7K or lower
5.5K and 7.5K
11K and 15K
3.7K or lower
5.5K and 7.5K
11K and 15K
60Hz
3.7K or lower
5.5K and 7.5K
11K and 15K
9999
(1) Acceleration time setting (Pr. 7, Pr. 20)
Use Pr. 7 Acceleration time to set the acceleration time required to reach Pr. 20
Running
Acceleration/deceleration reference frequency from 0Hz.
frequency
Set the acceleration time according to the following formula.
Acceleration
Time
time setting
Parameter that should be Set
Pr. 7, Pr. 8, Pr. 20, Pr. 44, Pr. 45
Pr. 13, Pr. 571
Setting
Range
5s
10s 0 to 3600s Motor acceleration time.
15s
5s
10s 0 to 3600s Motor deceleration time.
15s
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.
5s
Acceleration/deceleration time when the RT
10s 0 to 3600s
signal is ON.
15s
0 to 3600s Deceleration time when the RT signal is ON.
9999 Acceleration time = deceleration time
Acceleration time from stop to maximum
Pr. 20
×
=
Maximum operating
operating frequency
frequency - Pr. 13
Pr. 7 =
Refer to Page
Pr. 29
100
Description
60Hz
× 10s
50Hz - 0.5Hz
97
99
4
12.1s
97