![background image](http://html1.mh-extra.com/html/omron/cj1w-nc271-12-2009/cj1w-nc271-12-2009_operation-manual_742348311.webp)
283
Acceleration and Deceleration Operations
Section 7-4
In the S-curve acceleration/deceleration curve, a moving average is taken
based on the Moving Average Time Interval (Pn812 (this is possible with
Pn10E in the G series Servo Drive and with Pn818 in the G5 series Servo
Drive)) for the linear acceleration/deceleration curve specified in Pn80A to
Pn80F (Pn106 to Pn10B when using a G series Servo Drive, Pn811 and
Pn814 when using a G5 series Servo Drive) to smooth out sudden changes in
acceleration or deceleration (angles in the acceleration/deceleration curve).
The acceleration/deceleration for the S-curve acceleration/deceleration curve
will not exceed the maximum acceleration/deceleration of the linear accelera-
tion/deceleration of the linear acceleration/deceleration curve prior to taking
the moving average.
The time width where the average of the acceleration/deceleration curve is
taken is set as the Moving Average Time Interval (Pn812 (set by Pn10E in the
G series Servo Drive and by Pn818 in the G5 series Servo Drive)). For accel-
eration/deceleration curves having a fixed-speed region that is large enough
for the target speed (speed command value), the time to reach the target
speed by the S-curve acceleration/deceleration curve is slower than the linear
acceleration/deceleration curve by the amount of the setting value of the Mov-
ing Average Time Interval (Pn812 (set by Pn10E in the G series Servo Drive
and by Pn818 in the G5 series Servo Drive)).
If the constant speed interval for the target speed is less than the movement
(running) average time or a triangular acceleration/deceleration curve occurs,
the achieved speed of S-curve acceleration/deceleration will be less than the
target speed.
Speed
The S-curve acceleration/deceleration for
the acceleration/deceleration curve will
not reach the target speed if the target
speed (speed command value) constant
interval is too short or a triangular
acceleration/deceleration curve occurs.
Time
Speed command
Summary of Contents for CJ1W-NC271 - 12-2009
Page 2: ......
Page 4: ...iv ...
Page 6: ...vi ...
Page 22: ...xxii ...
Page 58: ...30 Starting Operation Section 2 2 ...
Page 244: ...216 Axis Operating Input Memory Areas Section 4 8 ...
Page 264: ...236 Transferring Servo Parameters Section 5 3 ...
Page 396: ...368 Linear Interpolation Section 9 7 ...
Page 648: ...620 List of Error Codes Appendix D ...
Page 674: ...646 Additional Functions for the CJ1W NCF71 MA Appendix F ...
Page 684: ...656 Index ...
Page 686: ...658 Revision History ...