Omron CS1W-MC221 -, Operation Manual

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Absolute Encoder Interface Specifications Section 9-7
!Caution
Do not execute the absolute origin setting for at least one second after the
main power supply or control power supply to the Servo Driver is turned ON.
!Caution
If a Servo Driver error occurs when the absolute origin is being set, the abso-
lute origin may not be set correctly. Set the absolute origin again if a Servo
Driver error occurs.
9-7 Absolute Encoder Interface Specifications
This section describes the interface specifications used for OMRON U-series
Servo Drivers with absolute encoder specifications.
Absolute Encoder Output
Specifications An absolute encoder outputs data from phase A, phase B, phase Z, and ABS.
It has the following system configuration. With W-series models, the Absolute
Encoder and Servo Driver are connected via serial communications.
1,2,3... 1. Absolute data is output as serial data from phase A by changing the SEN
signal level from low to high.
2. Initial incremental pulses are output from phase A and phase B (90
°
differ-
ential two-phase pulses).
3. Output operation (90
°
differential two-phase pulses) similar to that of ordi-
nary incremental encoders is performed.
4. The number of revolutions is output as serial data from ABS.
The MC Unit does not receive the ABS output.
Absolute Encoder
Serial data
Divider
circuit
Phase A
Phase Z
Phase B
SEN
ABS
U-series Servo Driver
SEN signal
Phase A
Phase B
Undefined
Undefined
Serial
data
Absolute data
Initial
incremental
pulse
Serial data for revolution count
ABS
Undefined
Normal incremental pulse