Absolute Encoders; Absolute Position Detection - YASKAWA SVC User Manual

5.2

Absolute Encoders

This section provides information and describes settings that are necessary to perform motion
control with a machine that uses an absolute encoder.
5.2.1

Absolute Position Detection

To detect the absolute position of the machine (axis), the MP3000 constantly reads the current
value of the absolute encoder attached to the Servomotor. As a result, automatic operation can
be immediately performed because the machine coordinate system is automatically detected
as soon as the power supply is turned ON.
Systems that use absolute position detection do not need to perform an origin return operation
after the power supply is turned ON.

Absolute Encoders

An absolute encoder outputs the absolute position (position data for the rotational angle) from a
reference position (origin of the encoder).
The absolute encoder uses a battery connected to the battery terminals of the SERVOPACK to
Term
maintain the absolute position data (called the absolute value data) at all times, even when the
power supply is turned OFF. The absolute value data is also updated if the position changes while
the power supply is OFF.
The absolute encoder consists of a detector that is used to detect the absolute position within
one rotation and a counter that is used to count the number of rotations. After automatic opera-
tion starts, the absolute encoder operates in the same way as an incremental encoder.
5.2 Absolute Encoders

5.2.1 Absolute Position Detection

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