Acc/Dec Process Function - Mitsubishi MELSEC-Q Series User Manual

11
AUXILIARY FUNCTION
11.6

ACC/DEC Process Function

This function adjusts the acceleration/deceleration when OPR control, positioning control
or JOG operation is performed.
Adjusting the acceleration/deceleration processing according to used equipment and
control enables finer control.
Settable adjustment items regarding acceleration/deceleration, "speed at start", "target
speed", "ACC/DEC time", and "ACC/DEC method".
(1) Control contents
Speed
at start
Set the time that the axis reaches the "target speed" from "speed at start" in "ACC/DEC time.
Set "speed at start", "target speed", and "ACC/DEC time" to each control individually.
(For details, refer to "CHAPTER 4 DATA USED FOR POSITIONING CONTROL".)
Control contents
OPR control
Positioning control
JOG operation
Figure 11.7 Relation among "speed at start", "ACC/DEC time", and "target speed"
POINT
(a) Relation among "speed at start", "ACC/DEC time", and "target speed"
V
Target speed
ACC/DEC
time
Parameter set as "target
speed"
OPR speed
Pr.13
Command speed
Da.4
JOG speed
JOG.1
(b) Handling of acceleration in the QD72P3C3 and actual ACC/DEC time
Acceleration at acceleration/deceleration operation is calculated using "ACC/DEC
time", "speed at start", "target speed", and "pulse unit".
However, since acceleration is processed as integer value, time actually taken to
acceleration/deceleration"actual ACC/DEC time" may differ from "ACC/DEC
time".
For calculation of "acceleration" and "time actually taken to acceleration/
deceleration", refer to the following.
• Section 11.6.1 Calculating the actual ACC/DEC time
t
ACC/DEC
time
Parameter set as "speed at Parameter set as "ACC/DEC
start"
Creep speed
Pr.14
Bias speed at start
Pr.5
Bias speed at start
Pr.5
11.6 ACC/DEC Process Function
time"
ACC/DEC time at OPR
Pr.15
ACC/DEC time
Da.3
JOG ACC/DEC time
JOG.2
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