Absolute Encoders - Omron CS1W-MC221 - 02-2008 Operation Manual

Absolute Encoders

9-5 Absolute Encoders
Overview
Applicable Absolute
Encoders
The absolute encoder retains absolute data by using the backup battery when
the MC Unit is turned OFF. When the MC Unit is turned ON again, the abso-
lute data can be read from the absolute encoder to determine the present
position. Unlike with the incremental encoder, once an origin has been set,
the absolute encoder requires no origin search when turned ON.
SEN signal
MC Unit
Absolute data
Battery
The MC Unit receives data from the absolute encoder by changing the SEN
signal level from low to high.
For details on absolute encoder interfaces, refer to 9-7 Absolute Encoder
Interface Specifications.
The MC Unit receives absolute data by changing the SEN signal state from
OFF to ON when the Run Command Output to the Servo Driver is changed
from OFF to ON.
The following Servomotors are provided with absolute encoders that can be
connected to the MC Unit.
OMRON U Series: R88M-U@@@@@S
R88M-U@@@@@T
OMRON W Series: R88M-W@@@@@S
R88M-W@@@@@T
OMRON G Series: R88M-G@@@@@S
R88M-G@@@@@T
Motor (absolute encoder)
Servo Driver
Section 9-5
Backup by battery
479