5.2 Absolute Encoders
5.2.6 Position Management Method for Each Machine Operation Type
5-34
SERVOPACK Parameter Settings
The SERVOPACK parameters that must be set for an absolute encoder system are listed in the
following table.
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.
Precautions for Parameter Settings
The names of some of the motion parameters and SERVOPACK parameters are different even
though they have the same meaning. Set the values of these motion parameters and SERVO-
PACK parameters so that they are consistent with each other.
Encoder Selection
Set the parameters as shown in the following table for an axis that performs absolute position
detection.
Number of Pulses Per Motor Rotation
Refer to the following table and set fixed parameter No. 36 (Number of Pulses Per Motor Rota-
tion) according to the number of encoder bits (resolution). This setting can be used for all SER-
VOPACK models.
The setting of the Pn212 (Number of Encoder Pulses) SERVOPACK parameter is not used for
control with the MP3000. It is not necessary to change the set value of Pn212.
Parameter Name Description Reference
Pn000 n.
X
Rotation/
Movement
Direction
Selection
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)
−
Pn205 –
Multiturn
Limit
0 to 65,535
Maximum Number of
Absolute Encoder Rota-
tions on page 5-28
Pn002 n.X
Encoder
Usage
0: Use the encoder according to encoder specifi-
cations.
2: Use the encoder as a single-turn absolute
encoder.
Encoder Selection on
page 5-27
Type Parameter Setting
Motion Parameter
Fixed Parameter No. 30
(Encoder Selection)
1: Absolute encoder
SERVOPACK
Parameter
Pn002 = n.X (Encoder
Usage)
0: Use the encoder according to encoder specifications.
2: Use the encoder as a single-turn absolute encoder.
Encoder Resolution
(Number of Bits)
Fixed Parameter No. 36 (Number
of Pulses Per Motor Rotation)
12 4,096
13 8,192
15 32,768
16 65,536
17 131,072
20 1,048,576
22 4,194,304
24 16,777,216
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