12 - 86
MELSEC-Q
12 CONTROL SUB FUNCTIONS
When a speed change request is given durin g S-pattern
acceleration/deceleration processing, S-pattern ac celeration/deceleration
processing begins at a speed change request star t.
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/dece leration processing
Set the required values for the "accelerat ion/deceleration method setting" in
the parameters shown in the following table, and write th e m to th e QD7 5 .
The set details are validated when written to t he 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 wh enever possible with GX
Configurator-QP. Execution by sequence program uses many sequence programs
and devices. The execution becomes com plicated, and the scan times will
increase.