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11 SUB FUNCTIONS
(a) Trapezoidal Acceleration/Deceleration
The speed is increased or decreased between " Pr. 6 Bias speed at start" and the target speed
linearly during the acceleration or deceleration time.
V
Pr.6
(b) S-curve Acceleration/Deceleration
The speed is increased or decreased between " Pr. 6 Bias speed at start" and the target speed in
a S-curve during the acceleration or deceleration time.
V
Pr.6
11 - 12
Slope of acceleration/deceleration
The slope of acceleration/deceleration is calculated by the following expression.
(Target speed) - (bias speed at start)
(Set acceleration time/set deceleration time)
POINT
For the QD70D, the acceleration/deceleration slope is determined by the three
data of "bias speed at start", "target speed" and "acceleration/deceleration time".
Fully note this when changing the setting values.
(A sharp acceleration/deceleration slope may affect the machine.)
(2) Setting and operation of "Acceleration/Deceleration method"
Whether to use the trapezoidal or S-curve acceleration/deceleration is set as
the acceleration/deceleration method. This setting is effective for all of the
acceleration/deceleration operations.
Target speed
Acceleration time
Target speed
Acceleration time
Fig. 11.7 Setting and operation of "Acceleration/Deceleration method"
MELSEC-Q
Deceleration time
Deceleration time
t
t
11 - 12
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