Acceleration/Deceleration Pattern (Pr. 29) - Mitsubishi Electric FR-D720-0.2K-G Instruction Manual

Setting of acceleration/deceleration time and acceleration/ deceleration pattern
4.8.3

Acceleration/deceleration pattern (Pr. 29)

You can set the acceleration/deceleration pattern suitable for application.
Parameter
Number
Acceleration/deceleration
29
pattern selection
The above parameters can be set when Pr. 160 Extended function display selection = "0". (Refer to page 161.)
Setting value "0"
[Linear acceleration/
deceleration]
(r/min)
Setting value "1"
[S-pattern acceleration/
deceleration A]
3000
(r/min)
NOTE
 The acceleration/deceleration time of the S-pattern acceleration/deceleration A is the time period to reach the rated
motor speed. It is not the time period to reach Pr. 20 Acceleration/deceleration reference speed.
Setting value "2"
[S-pattern acceleration/
deceleration B]
(r/min)
f1
f2
(r/min)
NOTE
 When the RT signal turns ON during acceleration or deceleration with the S-pattern acceleration/deceleration B
enabled, a pattern of acceleration or deceleration changes to linear at the moment.
Parameters referred to
Pr. 7 Acceleration time, Pr. 8 Deceleration time, Pr. 20 Acceleration/deceleration reference speed
100
Name Initial Value
(1) Linear acceleration/deceleration (Pr. 29 setting "0", initial value)
For the drive unit operation, the rotation speed is made to change linearly
(linear acceleration/deceleration) to prevent the motor and drive unit from
getting excessive stress to reach the set speed during acceleration,
deceleration, etc. when speed changes. Linear acceleration/deceleration has a
uniform speed/time slope.
Time
(2) S-pattern acceleration/deceleration A (Pr. 29 = "1")
An acceleration/deceleration pattern in which the rated motor speed (3000r/
min) is the point of inflection in an S-pattern curve.
Time
(3) S-pattern acceleration/deceleration B (Pr. 29 = "2")
For prevention of load shifting in conveyor and other applications.
Since acceleration/deceleration is always made in an S shape from current
speed (f2) to target speed (f1), this function eases shock produced at
acceleration/deceleration and is effective for load collapse prevention, etc.
Time
Setting Range
0 Linear acceleration/ deceleration
0 1 S-pattern acceleration/deceleration A
2 S-pattern acceleration/deceleration B
Description
Refer to page 97.