YASKAWA E-V Series User Manual page 170

(4) Transferring Alarm Contents
If an absolute encoder is used, the contents of alarms detected by the SERVOPACK can be transmitted in
serial data to the host controller from the PAO output when the SEN signal changes to low level from high
level.
Note: SEN signal cannot be received during Servo ON.
Output example of alarm contents are as shown below.
SEN Signal
Digital Operator
Display
PAO
Serial Data
Error detection
High level
or
Incremental pulse
5.9 Setting Absolute Linear Scale
Overspeed
Serial Data
Serial Data Format
"A" "L" "M" Upper 2 digits
Low level
CR
"." "CR"
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