Yaskawa SGDB - Manual (Page 172)

APPLICATIONS OF Σ-SERIES PRODUCTS
3.8.5 Using an Absolute Encoder cont.
160
J Alarm Display
When a 12-bit absolute encoder is used, the following alarms are detected and dis-
played.
List of Alarms
Alarm Type Meaning
Digital
Operator
Display
PAO Serial
Data
PSO Serial
Data
Backup Alarm
Indicates that backup
voltage drop was
detected. (This alarm
helps maintain reliability of
rotation count data.)
CR ALM81.
CR
ALARMOA
BACK
Battery Alarm
Indicates that backup
voltage drop was
detected. (This alarm
warns of battery
replacement and
disconnection.)
CR ALM83.
CR
ALARMOD
BATT
Checksum
Error
Indicates that an error
was detected in memory
data check.
CR ALM82.
CR
ALARMOB
CHEC
Overspeed
Indicates that the motor
was running at a speed
exceeding 400 min −1
when the encoder was
turned ON.
CR ALM85.
CR
ALARMOP
OVER
Absolute Error
Indicates that an error
was detected in sensor
check inside the encoder.
CR ALM84.
CR
ALARMOH
ABSO
Backup/Battery
Combination
Alarm
CR ALM81.
CR
ALARMOE
BACK
(BATT)
The SEN signal can be used to output alarm information from PAO and PSO as serial
data.
SEN Signal
“H” “H”
“L”:
“H”
“L”
Error detection
Digital
Operator
Display
or Absolute encoder alarm
(Details unknown)
Absolute encoder alarm
(Alarm type identified)
PAO Serial
Data
Incremental pulse
CR ALM80.
CR
ALARMO *
CR
ALM8 * .
PSO Serial
Data
P¦jjjjj,
jjjj
CR
and so on
H¦jjjjj,
jjjj
CR
(Undefined)
CR
ALARMO *
****
(Undefined)
3