8-25
8-4 Analog Control Parameters
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
8
Parameters Details
Control the speed by setting acceleration/deceleration to the speed command inside the Servo
Drive
.
A soft start can be set when inputting speed commands of stepping movement or when using
internal speed setting.
Do not set acceleration/deceleration time settings when using the
Servo Drive in combination with
an external position loop. (Set both Pn312 and Pn313 to 0.)
Refer to "6-8 Soft Start (P.6-24)".
Precautions for Correct Use
Do not set the Soft Start Acceleration Time and the Soft Start Deceleration Time when the position
loop structure with a Host Controller is used.
Set the pseudo-S-curve acceleration/deceleration value to add to the speed command to enable
smooth operation. This is useful for applications where impact may occur due to a large change
in acceleration or deceleration when starting or stopping with linear acceleration or deceleration.
Refer to "6-8 Soft Start (P.6-24)".
Pn311
Unused
Setting
range
Unit
Default
setting
Data
attribute
Pn312
Soft Start Acceleration Time
Setting
range
0 to 10000 Unit
ms/maximum motor
speed
Default
setting
0
Data
attribute
B
Pn313
Soft Start Deceleration Time
Setting
range
0 to 10000 Unit
ms/maximum motor
speed
Default
setting
0
Data
attribute
B
Rotation
speed [r/min]
Maximum motor
rotation speed
Step input of a rotation
speed command
Rotation speed command
after acceleration or
deceleration processing
Pn312
×
1 ms Pn313
×
1 ms
Pn314
S-curve Acceleration/Deceleration Time Setting
Setting
range
0 to 1000 Unit ms
Default
setting
0
Data
attribute
B
ta td
ts ts
tsts
Rotation
speed [r/min]
Target speed
(Vc)
ta = Vc / Maximum motor rotation speed × Pn312 × 1 ms
td = Vc / Maximum motor rotation speed × Pn313 × 1 ms
ts = Pn314 × 1 ms
Be sure that ts is smaller than the values
obtained by the divisions of
and .
2
ta
2
td
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