YASKAWA SGDA series - Page 364

INSPECTION, MAINTENANCE AND TROUBLESHOOTING
6.2.1 Troubleshooting Problems with Alarm Displaycont.
354
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.80
Absolute encoder
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
C
At power ON
Speed control
Cn-01 Bit 1 = 0
Speed control
Cn-01 Bit 1 = 1
During servomotor
operation
A
,
B
,
C
A
,
B
,
D
,E
Position control
A
,
B
,
C
Cause Remedy
A Incorrect absolute encoder wiring (PA, PB,
RESET, SEN signal (for speed control),
etc.)
Check and correct the absolute encoder
wiring.
B 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.
C Circuit board (1PWB) defective Replace Servopack.
D
Error occurred in absolute encoder.
D For speed control (Cn-01 Bit 1 = 0), turn
SEN signal OFF and back ON (if
servomotor is rotating, first turn servo
OFF).
Another encoder alarm displayed when
SEN signal or power supply turned back
ON.
D For speed control (Cn-01 Bit 1 = 1) or
position control, turn Servopack power
OFF and back ON.
E Servopack miscounted pulses (positional
displacement) or malfunctioned due to
noise.
• Separate encoder wiring from main wiring
circuits.
• For speed control (Cn-01 Bit 1 = 0), turn
SEN signal OFF and back ON (if servomo-
tor is rotating, first turn servo OFF).
• For speed control (Cn-01 Bit 1 = 1) or posi-
tion control, turn Servopack power OFF
and back ON.
6