6.7 Absolute Encoders
6-23
6
Application Functions
6.7
Absolute Encoders
The absolute encoder records the current position of the stop position even when the power supply is
OFF.
With a system that uses an absolute 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 four types of encoders for Rotary Servomotors. The usage of the encoder is specified in
Pn002 = n.
X
.
SERVOPACKs with software version 0023 or higher support batteryless absolute encoders.
Refer to the following section for encoder models.
•
Parameter Settings When Using an Incremental Encoder
•
Parameter Settings When Using a Single-Turn Absolute Encoder
•
Parameter Settings When Using a Multiturn Absolute Encoder
•
Parameter Settings When Using a Batteryless Multiturn Absolute Encoder
Parameter
Meaning
When Enabled Classification
Pn002
n.
0
(default setting)
Use the encoder as an incremental encoder.
A battery is not required.
After restart
Setup
n.
1
Use the encoder as an incremental encoder.
A battery is not required.
n.
2
Use the encoder as a single-turn absolute encoder.
A battery is not required.
Parameter
Meaning
When Enabled Classification
Pn002
n.
0
(default setting)
Use the encoder as a single-turn absolute encoder.
A battery is not required.
After restart
Setup
n.
1
Use the encoder as an incremental encoder.
A battery is not required.
n.
2
Use the encoder as a single-turn absolute encoder.
A battery is not required.
Parameter
Meaning
When Enabled Classification
Pn002
n.
0
(default setting)
Use the encoder as a multiturn absolute encoder.
A battery is required.
After restart
Setup
n.
1
Use the encoder as an incremental encoder.
A battery is not required.
n.
2
Use the encoder as a single-turn absolute encoder.
A battery is not required.
Parameter
Meaning
When Enabled Classification
Pn002
n.
0
(default setting)
Use the encoder as a batteryless multiturn absolute
encoder.
A battery is not required.
After restart
Setup
n.
1
Use the encoder as an incremental encoder.
A battery is not required.
n.
2
Use the encoder as a single-turn absolute encoder.
A battery is not required.
NOTICE
Install a battery at either the host controller or on the Encoder Cable.
If you install batteries both at the host controller and on the Encoder Cable at the same time, you
will create a loop circuit between the batteries, resulting in a risk of damage or burning.