479
Absolute Encoders
Section 9-5
9-5
Absolute Encoders
Overview
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.
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.
Applicable Absolute
Encoders
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
MC Unit
SEN signal
Absolute data
Battery
Motor (absolute encoder)
Backup by battery
Servo Driver
Summary of Contents for CS1W-MC221 -
Page 1: ...Motion Control Units Cat No W359 E1 04 CS1W MC221 V1 421 V1 OPERATION MANUAL ...
Page 2: ...CS1W MC221 V1 421 V1 Motion Control Units Operation Manual Revised February 2008 ...
Page 3: ...iv ...
Page 5: ...vi ...
Page 11: ...xii ...
Page 15: ...xvi ...
Page 19: ...xx ...
Page 27: ...xxviii Conformance to EC Directives 6 ...
Page 133: ...106 Installation Section 2 2 2 2 4 Dimensions CS1W MC421 CS1W MC221 ...
Page 173: ...146 Connecting Peripheral Devices Section 2 7 ...
Page 227: ...200 Command Area Section 3 6 ...
Page 351: ...324 Interface Specifics Section 5 4 ...
Page 513: ...486 Absolute Encoder Interface Specifications Section 9 7 ...
Page 575: ...548 Error Log Section 12 6 ...
Page 589: ...562 Performance Appendix A ...
Page 655: ...628 Control Bit Flag Timing Charts Appendix E ...
Page 683: ...656 Origin Search Patterns Appendix F ...
Page 685: ...658 Encoder Divider Rate and Rotation Speed for OMRON Servo Drivers Appendix G ...