YASKAWA MECHATROLINK Sigma 2 Series User Manual page 189

9 Troubleshooting
A.d0
A.d0: Position Error Pulse Overflow
Display and Outputs
Alarm Outputs
Alarm Code Outputs
ALO1 ALO2
ON ON
Note: OFF: Output transistor is OFF (alarm state). ON: Output transistor is
ON.
Status and Remedy for Alarm
During servomotor
operation
Overflow during
high-speed rotation
Operation is normal,
but overflow occurs
when long reference
is input.
Cause
A Servomotor wiring incorrect or poor connec-
tion.
B SERVOPACK was not correctly adjusted.
C Motor load was excessive.
D
Position reference is too high.
ALM Output
ALO3
OFF OFF
At power ON
A
B, C, D
Check wiring and connectors at servomo-
tor.
Increase speed loop gain (Pn100) and
position loop gain (Pn102).
Reduce load torque or moment of inertia.
If problem not corrected, replace with a
servomotor with larger capacity.
• Reduce the acceleration/deceleration
• Correct electronic gear ratio.
9-14
E
Remedy
rate.