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Acceleration/deceleration Processing Function - Mitsubishi Electric QD70D4 User Manual

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11 SUB FUNCTIONS

11.6 Acceleration/deceleration processing function

V
Pr. 6
(Set acceleration time) = (actual acceleration time)
(Set acceleration/deceleration time) = (actual acceleration/deceleration time) if " Pr. 6 Bias speed at start" is either 0 or other
than 0.
Not that, for S-curve acceleration/deceleration, because the last deceleration speed is " Pr. 6 Bias speed at start" + 1pps, the
actual deceleration time will exceed the preset deceleration time.
In this case, the actual deceleration time can be shortened by setting any other than 0pps for the " Pr. 6 Bias speed at start".
• The set acceleration/deceleration time is the actual acceleration/deceleration time and " Pr. 5 Speed limit value" does not
influence the acceleration/deceleration time.
• The acceleration/deceleration time slope varies if the setting of " Pr. 6 Bias speed at start" is changed.
• The "set acceleration time" and "set deceleration time" are available individually for the functions
(For details, refer to "CHAPTER 4 DATA USED FOR POSITIONING CONTROL".)
<Jog operation>
Set acceleration time: JOG. 1 JOG ACC time, set deceleration time: JOG. 2 JOG DEC time
<Positioning control (Operation pattern: Positioning termination, continuous positioning control)>
Set acceleration time: Da. 3 ACC/DEC time, set deceleration time: Da. 4 DEC/STOP time
Fig. 11.6 Operation by "Bias speed at start", "Target speed", "Acceleration time" and "Deceleration time"
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The "acceleration/deceleration processing function" is designed to adjust
acceleration/deceleration when OPR control, positioning control or JOG operation is
performed.
Adjusting the acceleration/deceleration processing according to control enables finer
control.
The acceleration/deceleration adjusting items that can be set are "bias speed at start",
"target speed", "acceleration time","deceleration time",and " Acceleration / Deceleration
System Selection".
The following will be explained for the "acceleration/deceleration processing function".
[1] Control details
[2] Precautions for control
[1] Control details
The following is the operation of the acceleration/deceleration processing
function of the QD70D.
(1) Operation by "Bias speed at start", "Target speed", "Acceleration
time" and "Deceleration time"
Target speed
"
Pr. 6
Bias speed at start"
is other than 0
"
Bias speed at start" is 0
Pr. 6
(Set deceleration time) = (actual deceleration time)
MELSEC-Q
t
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