Mitsubishi Electric RD77MS2 User Manual page 295

■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.35] S-curve ratio" (1 to 100%) set by the user.
V
When a speed change request or override request is given during S-curve acceleration/deceleration processing, S-curve
acceleration/deceleration processing begins at a speed change request or override request start.
When speed change
request is not given
Speed change request
Speed change (deceleration)
Set the required values for the "acceleration/deceleration method setting" in the parameters shown in the following table, and
write them to the Simple Motion module.
The set details are validated when written to the Simple Motion module.
Setting item
[Pr.34] Acceleration/deceleration
process selection
[Pr.35] S-curve ratio
Refer to the following for the setting details.
Page 407 Basic Setting
• Parameters are set for each axis.
• It is recommended that the parameters be set whenever possible with the engineering tool. Execution by a
program uses many programs and devices. The execution becomes complicated, and the scan times will
increase.
t
Speed change (acceleration)
Command speed
before speed change
Setting
value


Setting details
Set the acceleration/deceleration method.
0: Trapezoidal acceleration/deceleration
processing
1: S-curve acceleration/deceleration processing
Set the acceleration/deceleration curve when "1"
is set in "[Pr.34] Acceleration/deceleration
process selection".
Factory-set initial value
0
100
8 CONTROL SUB FUNCTIONS
8.9 Other Functions
8
293