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MELSEC-
A
12 CONTROL AUXILIARY FUNCTIONS
(b) S-curve acceleration/deceleration processing method
In this method, the motor burden is reduced during starting and stopping.
This is a method in which acceleration/deceleration is carried out gradually,
based on the acceleration time, deceleration time, speed limit value, and
"
Pr.36 S-curve ratio" (1 to 100%) set by the user.
V
elocity
Time
Fig. 12.43 S-curve acceleration/deceleration processing method
When a speed change request is made during S-curve
acceleration/deceleration processing, S-curve acceleration/deceleration
processing is performed from the start of the speed change request.
Speed change (acceleration)
Command speed before speed change
Speed change (deceleration)
Speed change erquest
When speed charge
request is not given
Fig. 12.44 S-curve acceleration/deceleration processing method
Set the required values for the "acceleration/deceleration method setting" in
the parameters shown in the following table, and write them to the D75P2.
The set details are validated when written to the D75P2.
Setting item
Setting
value
Setting details
Factory-set
initial value
Pr.35
Acceleration/
deceleration
process selection
Set the acceleration/deceleration method.
0: Automatic trapezoidal acceleration/deceleration method
1: S-curve acceleration/deceleration processing
0
Pr.36
S-curve ratio
Set the acceleration/deceleration curve when "1" is set in
"
Pr.35 Acceleration/deceleration processing selection".
100
* Refer to section "5.2 List of parameters" for setting details.
REMARK
Parameters are set for each axis.