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8. AUXILIARY AND APPLIED FUNCTIONS
8.6
Absolute Positioning System
The absolute positioning system can be used for positioning control when using an
absolute-position-compatible servomotor and MR- -B.
Zeroing is not necessary using the absolute positioning system because after the
machine position is initially established at system startup, the absolute position is
sensed each time the power is turned on.
The machine position is established using a zeroing initiated from the sequence
program or a peripheral device.
(1) Absolute position system startup procedure
The system startup procedure is shown below.
Absolute position system startup
For MR-
-B
• Connect CPU to absolute-position-compatible
MR- -B.
• Connect FLS, RLS, STOP etc. wiring to
A278LX/A172SENC
Adjust Machine Position
Adjust machine to home position.
Turn On Power
Turn on the servo amplifier and servo system CPU
power.
Set Positioning Parameters
Set the following positioning parameters:
• System setting *
• Fixed parameters *
• Servo parameters *
• Zeroing data*
• Parameter block
Sense Absolute Position
Make a sense absolute position request from the
sequence program or a peripheral device.
Adjust the Machine Position
Make any required adjustments to the machine
position using the manual pulse generator or JOG
operation.
Establish Absolute Position
Establish the absolute position using zeroing
by the data set method.
End
For ADU (when A273UHCPU is used)
• Connect ADU and absolute position-compatible
• Connect battery module to CPU base unit.
• Connect FLS, RLS, STOP and other wires
• Parameters marked "* " must be set.
(Do not change them after they are set.)
• Default values are used if the parameter block is
not set.
• Turn ON M2000 in a sequence program.
• Select test mode with a peripheral device.
• Enable manual pulse generator operation from the
sequence program or a peripheral device.
• JOG operation is possible from the sequence program
or a peripheral device.
• Use a sequence program to run the zeroing
servo program ZERO.
• With a peripheral device, carry out zeroing
in test mode.
8 − 12
servo motor.
to A278LX.
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