Setting The Origin Of The Absolute Encoder; Absolute Encoder Origin Offset; Setting The Origin Of The Absolute Linear Encoder; Encoder - YASKAWA SGD7C-***AMAA*** Product Manual

5.17 Setting the Origin of the Absolute Encoder

5.17.1 Absolute Encoder Origin Offset

5.17

Setting the Origin of the Absolute Encoder

5.17.1 Absolute Encoder Origin Offset

The origin offset of the absolute encoder is a correction that is used to set the origin of the
machine coordinate system in addition to the origin of the absolute encoder. Set the offset
between the absolute encoder origin and the machine coordinate system origin in Pn808
(Absolute Encoder Origin Offset).
After turning the power supply OFF and ON again, the position in the machine coordinate sys-
tem (APOS) is set based on the absolute encoder position data and the setting of Pn808.
Pn808
Example

5.17.2 Setting the Origin of the Absolute Linear Encoder

You can set any position as the origin in the following Linear Encoders.
• Mitutoyo Corporation
ABS ST780A Series or ST1300 Series
Models: ABS ST78  A/ST78  AL/ST13 
• Renishaw PLC
EVOLUTE Series
Models: EL36Y- 
• Renishaw PLC
RESOLUTE Series
Models: RL36Y- 
Important
Preparations
Always check the following before you set the origin of an absolute linear encoder.
• The parameters must not be write prohibited.
• The servo must be OFF.
5-46
Absolute Encoder Origin Offset
Setting Range Setting Unit
-1,073,741,823 to
1 reference unit
1,073,741,823
If the encoder position (X) is at the origin of the machine coordinate system (0), then Pn808
would be set to -X.
Machine coordinate
Encoder coordinate
Ab olute encoder origin
1. After you set the origin, the /S-RDY (Servo Ready Output) signal will become inactive because
the system position data was changed. Always turn the SERVOPACK power supply OFF and
ON again.
2. After you set the origin, the Servomotor phase data in the SERVOPACK will be discarded. If
you are using a Linear Servomotor without a Polarity Sensor, execute polarity detection again
to save the Servomotor phase data in the SERVOPACK.
Po ition
Default Setting When Enabled
0 Immediately
Pn808
Classification
Setup
Origin of machine
coordinate y tem
Encoder po ition (X)