Omron CJ1W-NC271 - 12-2009 Operation Manual page 55

Starting Operation
Pn80B
(Second-step Linear Acceleration Constant)
Pn80C
(Acceleration Constant Switching Speed)
The Servomotor starts rotating up to the target speed of 100,000 pulses/s and
stops at 500,000 pulses. The acceleration/deceleration speed depends on the
Servo Parameters set for the Servo Drive. When a W-series Servo Drive and
the FNY-NS115 are used together, the acceleration and deceleration speeds
are set in the Servo Parameters as follows:
Parameter Parameter name
No.
Pn80A First-step linear
acceleration con-
stant
Pn80B Second-step linear
acceleration con-
stant
Pn80C Acceleration con-
stant switching
speed
Pn80D First-step linear
deceleration con-
stant
Pn80E Second-step linear
deceleration con-
stant
Pn80F Deceleration con-
stant switching
speed
In this operation example, the default settings are used for the acceleration/
deceleration constants. With the default settings, the acceleration/decelera-
tion movement uses a linear acceleration/deceleration waveform, and the
slope of the acceleration and deceleration is 1,000,000 pulses/s
speed is 100,000 pulses/s, so after starting, the motor accelerates up to the
target speed in 0.1 s, and decelerates to a stop from the target speed in 0.1 s.
Speed
In this operation example, the acceleration/deceleration constant switching
speed is 0. Therefore, from startup, the motor accelerates according to the
Second-step Linear Acceleration Constant and decelerates using the
Second-step Linear Deceleration Constant until stopping. The First-step
Acceleration/Deceleration Constants are not used.
The present position of each axis can be monitored in the Axis Operating
Input Memory Areas.
In this operation example, the Common Parameters are set so that the begin-
ning word of the Axis Operating Input Memory Area for axis 1 is allocated in
CIO 500. Therefore, the present position (feedback present position) for axis 1
is allocated in CIO 506 and CIO 507.
Feedback present position
CIO 506
(rightmost word)
CIO 507
Feedback present position (leftmost word)
Default Unit
100 10,000 command
2
units/s
100 10,000 command
2
units/s
0 100 command
units/s
100 10,000 command
2
units/s
100 10,000 command
2
units/s
0 100 command
units/s
Pn80E
(Second-step Linear Deceleration Constant)
Pn80F
(Deceleration Constant Switching Speed)
Time
Section 2-2
Setting in this
example
Not used.
1,000,000
2
pulses/s
Default settings
used.
Not used.
1,000,000
2
pulses/s
Default settings
used.
2
.The target
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