YASKAWA SGDA series

INSPECTION, MAINTENANCE AND TROUBLESHOOTING
6.2.1 Troubleshooting Problems with Alarm Displaycont.
358
Display and Outputs
Digital Operator
Di l
d
Alarm Output
g
p
Display and
Alarm
Name
Alarm Code Output
Alarm Output
Al
arm
N
ame
ALO1 ALO2 ALO3
p
A.84
Absolute encoder
data error (only if
absolute encoder
is used)
OFF OFF OFF OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
Status When Alarm Occurred
B
At power ON
Speed control
Cn-01 Bit 1 = 0
Speed control
Cn-01 Bit 1 = 1
When SEN signal turned
ON, Cn-01 Bit 1 = 0
A
A
Position control
A
During operation
(see note)
A
Cause Remedy
A Absolute encoder malfunctioned
• For speed control (Cn-01 Bit 1 = 0), turn
SEN signal OFF and back ON.
• For speed control (Cn-01 Bit 1 = 1) or posi-
tion control, turn Servopack power OFF
and back ON.
• Replace servomotor if error occurs fre-
quently.
B Circuit board (1PWB) defective Replace Servopack.
Note
No alarm occurs at the Servopack when a data error (
A.84
) is generated. The data error
(A.84) occurs the next time the SEN signal (or Servopack) turns ON.
However, the data error (A.84) can be read during operation if the host controller is receiving
the S-phase signal (serial data).
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