Yaskawa DR2 Sigma Servo - Manual (Page 404)

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.
6