YASKAWA SGM series User Manual page 366

INSPECTION, MAINTENANCE AND TROUBLESHOOTING
6.2.1 Troubleshooting Problems with Alarm Display cont.
6
Note
356
Display and Outputs
Digital Operator g p
Di Display and l d
Alarm Name Alarm Name
ALO1
A.82
OFF
Absolute encoder
sum-check error
(only if absolute
encoder is used)
Status When Alarm Occurred
At power ON
Speed control
Cn-01 Bit 1 = 0
Speed control
Cn-01 Bit 1 = 1
Position control
A Abnormality during absolute encoder
memory check
B Circuit board (1PWB) defective
An absolute encoder error (A.80) is given initially if a sum-check error (A.82) is generated
during operation.
The sum-check error (A.82) occurs after turning the SEN signal (or Servopack power supply)
OFF and back ON.
However, the sum-check error (A.82) does occur during operation if the host controller is re-
ceiving the S-phase signal (serial data).
Alarm Output
Alarm Code Output
ALO2
OFF
When SEN signal turned
ON, Cn-01 Bit 1 = 0
During operation
B
(see note)
A
, B
A
, B
Cause
• Follow absolute encoder set-up proce-
• Replace servomotor if error occurs fre-
Replace Servopack.
Alarm Output
ALO3
OFF OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
A
A
Remedy
dures.
quently.
p