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5.2 Absolute Encoders
5.2.6 Position Management Method for Each Machine Operation Type
Maximum Number of Absolute Encoder Rotations
Set the maximum number of absolute encoder rotations.
For a finite-length axis, set the SERVOPACK multiturn limit (Pn205) to the maximum value that
can be set. Set the Machine Controller's maximum number of absolute encoder rotations (fixed
parameter No. 38) to the same value as Pn205 in the SERVOPACK.
The set value when the system is used with the Σ-V- or Σ-7-series SERVOPACK is given in the
following table.
Machine Controller
Σ-V-series or Σ-7-series
SERVOPACK
Important
Setting the Origin
Set the origin after you reset the absolute encoder to set the origin of the machine coordinate
system and to create the machine coordinate system. Use the following procedure to do so.
Perform this procedure only once when the machine is initially started. This procedure is not
necessary at any other time.
Jog to near the origin.
Move to the origin in STEP Mode.
Set OL
(OL
Set the origin with the ZSET command.
Settings completed for all axes?
5-28
Type
Fixed parameter No. 38 (Maximum Number of Absolute
Encoder Rotations)
Parameter: Pn205 (Multiturn Limit Setting)
Set fixed parameter No. 38 and SERVOPACK parameter Pn205 to the same values to ensure
that correct motion control is performed and to prevent position variation.
Multiturn limit setting mismatch detection can be used to determine whether both values match.
Refer to the following section for details.
6.7 Multiturn Limit Setting Disagreement Detection on page 6-31
OL
48 (Zero Point Position Offset in Machine Coordinate System) is always valid when
the axis type is set to a finite-length axis. Do not change the setting of OL
machine is operating.
There is a risk of machine damage or an accident.
START
Servo ON
48 to the value of
48 − IL
10).
NO
YES
END
Parameter
CAUTION
Repeat for
each axis.
Set Value
65,535
65,535
48 while the
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