9.4
Absolute Position Detection for Infinite Length Axes
9-17
( 4 ) Detailed Descriptions
[ a ] Encoder Type/Encoder Selection/ Absolute Encoder Usage
For an axis performing absolute position detection, set the parameters as shown in the table below.
[ b ] Number of Encoder Resolution
■
If using the SVB-01 Module or the built-in SVB Module
Refer to the following table and set the fixed parameter 36 (Encoder Resolution in Pulses/Resolution)
according to the number of servomotor bits. The settings can be used for all SERVOPACK models.
■
If using the SVA-01 Module
The methods of setting the fixed parameters 36 and 22 differ depending on the SERVOPACK used.
• With SERVOPACKs in the
Σ
series
• With SERVOPACKs in the
Σ
-II series
* 1. This value depends on the setting of Pn212 (PG dividing ratio). The values in the
table are the maximum values.
* 2. Because the maximum value of Pn201 (PG dividing ratio) is 16384, the maximum value
with a 17-bit encoder is also 16384.
Model Parameter Setting
MP2300 Fixed parameter 30: Encoder Type
1: Absolute encoder
Σ
-
II
and
Σ
-
III
Series
SERVOPACK
Parameter Pn002.2: Absolute Encoder Usage
0: Uses absolute encoder as an absolute encoder
Σ
-
I
Series SERVO-
PACK
Parameter Cn-0001, Bit E: Encoder Selection
1: Absolute encoder
If the abos settings are not used, correct motion control will not be performed. Set the parameters carefully.
Be sure to set both the MP2300 and SERVOPACK parameters.
Number of Bits
MP2300
Fixed Parameter 36
(Encoder Resolution in Pulses/Resolution)
12 4096
13 8192
15 32768
16 65536
17 131072
20 1048576
Number of Bits
MP2300
Fixed Parameter 36
(Encoder Resolution in Pulses/Resolution)
Fixed Parameter 22
(Pulse Counting Mode)
12 1024
6: Pulse A/B mode (
×
4)
15 8192
6: Pulse A/B mode (
×
4)
Number of Bits
Fixed Parameter 36
(Encoder Resolution in Pulses/Resolution)
Fixed Parameter 22
(Pulse Counting Mode)
13
2048
∗
1
6: Pulse A/B mode (
×
4)
16
16384
∗
1
6: Pulse A/B mode (
×
4)
17
16384
∗
1
,∗
2
6: Pulse A/B mode (
×
4)