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MELSEC-Q
12 CONTROL SUB FUNCTIONS
When a speed change request is given during S-pattern
acceleration/deceleration processing, S-pattern acceleration/deceleration
processing begins at a speed change request start.
When speed change
request is not given
Speed change (acceleration)
Command speed before speed change
Speed change request
Speed change (deceleration)
Fig. 12.47 Speed change during S-pattern acceleration/deceleration processing
Set the required values for the "acceleration/deceleration method setting" in
the parameters shown in the following table, and write them to the QD75.
The set details are validated when written to the QD75.
Setting item
Setting
value
Setting details
Factory-set
initial value
Pr.34
Acceleration/
deceleration
process selection
Set the acceleration/deceleration method.
0: Automatic trapezoidal acceleration/deceleration
processing
1: S-pattern acceleration/deceleration processing
0
Pr.35
S-pattern
proportion
Set the acceleration/deceleration curve when "1" is set
in "
Pr.34
Acceleration/deceleration processing
selection".
100
Refer to Section 5.2 "List of parameters" for setting details.
REMARK
•
Parameters are set for each axis.
•
It is recommended that the parameters be set whenever possible with GX
Configurator-QP. Execution by sequence program uses many sequence programs
and devices. The execution becomes complicated, and the scan times will
increase.