Absolute Linear Encoders; Connecting An Absolute Linear Encoder - YASKAWA E-7S SERVOPACK SGD7S Product Manual

6.8

Absolute Linear Encoders

The absolute linear encoder records the current position of the stop position even when the power
supply is OFF.
With a system that uses an absolute linear encoder, the host controller can monitor the current
position. Therefore, it is not necessary to perform homing when the power supply to the system is
turned ON.
There are three types of linear encoders for Linear Servomotors. The usage of the linear encoder is
specified in Pn002 = n.
Refer to the following section for linear encoder models.

Feedback Resolution of Linear Encoder
•
Parameter Settings When Using an Incremental Linear Encoder
Parameter
 
n. 0
(default setting)
Pn002

n. 1
•
Parameter Settings When Using an Absolute Linear Encoder
Parameter
 
n. 0
(default setting)
Pn002

n. 1
6.8.1

Connecting an Absolute Linear Encoder

If you use an absolute linear encoder, the encoder divided pulse output signals (PAO, PBO, and
PCO) are output only once when the power supply turns ON. Normally, do not use these sig-
nals. You can get the position data from the absolute linear encoder with MECHATROLINK
communications. Therefore, it is not necessary to wire the PAO, PBO, and PCO (Encoder
Divided Pulse Output) signals.
If they need to be wired, refer to the following section.
4.4.3
Wiring the SERVOPACK to the Encoder
I/O Signal Wiring Examples
 
X .
on page 5-44
Use the encoder as an incremental linear encoder.

Use the encoder as an incremental linear encoder.
Use the encoder as an absolute linear encoder.

Use the encoder as an incremental linear encoder.
on page 4-27
on page 4-36

6.8.1 Connecting an Absolute Linear Encoder

Meaning
Meaning

6.8 Absolute Linear Encoders

When Enabled Classification
After restart Setup
When Enabled Classification
After restart Setup
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