INSPECTION, MAINTENANCE, AND TROUBLESHOOTING
6.2.1
Troubleshooting Problems with Alarm Display
cont.
392
Cause
Remedy
A
Absolute encoder power not supplied from
Servopack.
Use the Servopack power supply for the
absolute encoder.
B
Incorrect absolute encoder wiring (PA, PB,
RESET, SEN signal (for speed control),
etc.)
Check and correct the absolute encoder
wiring.
C
Absolute encoder malfunctioned
•
When Cn-01 Bit 1 = 0, turn SEN signal OFF
and back ON. (See note)
•
When Cn-01 Bit 1 = 1, turn Servopack con-
trol power OFF and back ON.
D
Incorrect user constant setting.
Incremental encoder used with Cn-01 Bit E
set to 1.
Set Cn-01 Bit E to 0.
E
Absolute encoder defective
Replace servomotor.
F
Circuit board (1PWB) defective
Replace Servopack.
NOTE
Resetting SEN Signal
When resetting the SEN signal (i.e., turning it OFF and then back ON) for any reason, keep
the SEN signal at the high level for more than 1.3 s before turning it OFF.
SEN signal
OFF
ON = High Level
1.3 s min.
OFF ON
15 ms min.
D
Display and Outputs
Digital Operator
Di l
d
Alarm Output
g
p
Display and
Alarm Name
Alarm Code Output
Alarm Output
Alarm Name
ALO1
ALO2
ALO3
p
A.02
User constants
breakdown
OFF
OFF
OFF
OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
Status When Alarm Occurred
At control power ON
A
,
B
Cause
Remedy
A
Power turned OFF during parameter write.
Alarm occurred next power ON.
Replace Servopack.
B
Circuit board (1PWB) defective
Replace Servopack.
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