YASKAWA E-7S SERVOPACK SGD7S - Absolute Linear Encoders; Connecting an Absolute Linear Encoder

6.8 Absolute Linear Encoders
6.8.1 Connecting an Absolute Linear Encoder
6-29
6
Application Functions
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.

X

.
Refer to the following section for linear encoder models.
 Feedback Resolution of Linear Encoder
on page 5-44
•
Parameter Settings When Using an Incremental Linear Encoder
•
Parameter Settings When Using an Absolute Linear Encoder
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
on page 4-27
I/O Signal Wiring Examples
on page 4-36
Parameter Meaning When Enabled Classification
Pn002
n.

0

(default setting)
Use the encoder as an incremental linear encoder.
After restart Setup
n.

1

Use the encoder as an incremental linear encoder.
Parameter Meaning When Enabled Classification
Pn002
n.

0

(default setting)
Use the encoder as an absolute linear encoder.
After restart Setup
n.

1

Use the encoder as an incremental linear encoder.