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Fixed Parameter Settings Required for Infinite Axis Position Management
To perform non-simple absolute infinite axis position management using the axis as an infinite-
length axis, set fixed parameter No. 1 bit 0 (Axis Selection) to 1: Infinite-length axis and fixed
parameter No. 1 bit 9 (Simple Absolute Infinite Axis Position Management) to 0 (Disabled).
No.
Bit
0
Axis Selection
1
Simple Absolute Infinite Axis Posi-
9
tion Management
Fixed Parameter Settings Required for an Absolute Encoder System
The following table lists the fixed parameters that must be set to perform infinite-length opera-
tion using non-simple absolute infinite axis position management.
No.
Name
4
Reference Unit Selection
30
Encoder Selection
Travel Distance per Machine
6
Rotation
8
Servomotor Gear Ratio Term
9
Machine Gear Ratio Term
Infinite-length Axis Reset Position
10
(POSMAX)
Number of Pulses Per Motor
36
Rotation
Maximum Number of Absolute
38
Encoder Rotations
*1.
Electronic gear settings are invalid when the pulse is selected as the reference unit.
*2.
N is the number of encoder bits.
SERVOPACK Parameter Settings
The SERVOPACK parameters that must be set for an absolute encoder system are listed in the
following table.
Parameter
Name
Rotation/
Movement
Pn000
n.
X
Direction
Selection
Multiturn
Pn205
–
Limit
Encoder
Pn002
n.
X
Usage
Note: These are parameters for Σ-7-Series SERVOPACKs. Refer to the manual for your SERVOPACK for details on param-
eters for SERVOPACKs in other series.
5.2.6 Position Management Method for Each Machine Operation Type
Name
Setting (Meaning)
1: Infinite-length axis
0: Disabled
Setting
*1
0: pulse
1: mm
2: deg
3: inch
4: μm
1: Absolute encoder
− 1
31
1 to 2
1 to 65,535
1 to 65,535
31
− 1
1 to 2
N *2
2
31
− 1
0 to 2
Description
0: Use CCW as the forward direction. (Rotary Ser-
vomotor)
Use the direction in which the linear encoder
counts up as the forward direction. (Linear Ser-
vomotor)
1: Use CW as the forward direction. (Rotary Ser-
vomotor)
Use the direction in which the linear encoder
counts down as the forward direction. (Linear
Servomotor)
0 to 65,535
0: Use the encoder according to encoder specifi-
cations.
2: Use the encoder as a single-turn absolute
encoder.
5.2 Absolute Encoders
Reference
Function Selection Flags 1
on page 3-28
Setting
Reference
Unit
Reference Unit Selection
–
on page 3-31
Encoder Selection on
–
page 3-33
Refer-
ence
–
units
Rota-
–
tions
Rota-
–
tions
Refer-
ence
–
units
Number of Pulses Per
pulse
Motor Rotation on page 5-39
Maximum Number of
Rota-
Absolute Encoder Rotations
tions
on page 3-35
Reference
Maximum Number of
Absolute Encoder Rota-
tions on page 5-28
Encoder Selection on
page 5-27
5
−
5-37
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