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-D700 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 131).
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 157)
Pr. 20
(50Hz)
Acceleration time Deceleration time
Pr. 7, Pr. 44
Pr. 8, Pr. 45
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
Acceleration/deceleration
times
Starting frequency and
start-time hold
Acceleration/deceleration
pattern
Initial Value
FR-D740-080 or less
FR-D720S-008 to 100
FR-D740-120 and 160
FR-D740-080 or less
FR-D720S-008 to 100
FR-D740-120 and 160
50Hz
FR-D740-080 or less
FR-D720S-008 to 100
FR-D740-120 and 160
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
0 to 3600s Motor acceleration time.
10s
5s
0 to 3600s Motor deceleration time.
10s
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
0 to 3600s
signal is on.
10s
0 to 3600s Deceleration time when the RT signal is on.
9999 Acceleration time = deceleration time
Pr. 20
×
=
Maximum operating
frequency - Pr. 13
Pr. 7 =
Refer to Page
Pr. 29
Description
Acceleration time from stop to maximum
operating frequency
50Hz
× 10s
40Hz - 0.5Hz
91
93
94
4
12.7s
91