YASKAWA SGMSV User Manual

4 Operation
4-36
4.7 Absolute Encoders
If using an absolute encoder, a system to detect the absolute position can be designed for use with the host
controller. As a result, an operation can be performed without a zero point return operation immediately after
the power is turned ON.
A battery case is required to save position data in the absolute encoder.
The battery is attached to the battery case of the encoder cable.
If an encoder cable with a battery case is not used, install a battery to the host controller.
<NOTE>
The standard specifications of the direct drive motor include a single-turn absolute encoder, so a battery case
is not required.
Also the following features are not required;
• Absolute encoder setup
• Multiturn limit setting
Set Pn002 to n.0 (factory setting) when you use an absolute encoder.
If you use an absolute encoder as an incremental encoder, you do not need a SEN battery.
PROHIBITED
• Do not install batteries in both the host controller and battery case. It is dangerous because that sets up a
loop circuit between the batteries.
Parameter Meaning
When
Enabled
Classification
Pn002
n.0
[Factory setting]
Uses the absolute encoder as an absolute encoder.
After restart Setup
n.1 Uses the absolute encoder as an incremental encoder.
The output range of the rotational serial data for the Σ-V absolute position detecting sys-
tem is different from that of earlier systems for 12-bit and 15-bit encoders. As a result,
the infinite-length positioning system of the Σ Series must be changed for use with prod-
ucts in the Σ-V Series. Be sure to make the following system modification.
Series (Models)
Absolute
Encoder
Resolution
Output Range
of Rotational
Serial Data
Action when Limit Is Exceeded
Σ Series
(SGD/SGDA/
SGDB)
12-bit
15-bit
-99999 to
+ 99999
• When the upper limit (+99999) is exceeded
in the forward direction, the rotational
serial data will be 0.
• When the lower limit (-99999) is exceeded
in the reverse direction, the rotational serial
data will be 0.
Σ-II Series
(SGDM/SGDH),
Σ-III Series
(SGDS), or
Σ-V Series
(SGDV)
17-bit
20-bit
-32768 to
+ 32767
• When the upper limit (+32767) is exceeded
in the forward direction, the rotational
serial data will be -32768.
• When the lower limit (-32768) is exceeded
in the reverse direction, the rotational serial
data will be +32767.
Note: The action differs when the multiturn
limit setting (Pn205) is changed. Refer
to 4.7.6 Multiturn Limit Setting.

YASKAWA SGMSV Specifications

General

Brand	YASKAWA
Model	SGMSV
Category	Servo Drives
Language	English