Advertisement
Sigma II User's Manual
n
A.d0
A.d0: Position Error Pulse Overflow
Display and Outputs
Status and Remedy for Alarm
During servomotor operation.
Servomotor wiring incorrect or poor
A
connection
Servo amplifier was not correctly
B
adjusted.
C
Motor load was excessive.
Position reference pulse frequency
D
was too high.
E
Circuit board (1PWB) defective.
Alarm Outputs
Alarm Code Output
ALO1
ALO2
ON
ON
Note:
OFF:
Output transistor is OFF (alarm state).
ON:
Output transistor is ON.
During high speed
rotation.
When a long reference
is entered during
normal operation.
When a properly entered
reference pulse does not
generate a feedback pulse.
Cause of the Problem
Chapter 9: Inspection, Maintenance, and Troubleshooting
ALM Output
ALO3
OFF
OFF
At power ON.
A
B, C, D
E
Solution
Check wiring and connectors at
encoder.
Increase speed loop gain (Pn100)
and position loop gain (Pn102).
Reduce load torque or inertia. If prob-
lem persists, replace with a larger
capacity motor.
•Increase or decrease reference
pulse frequency.
•Add smoothing function.
•Correct electronic gear ratio.
Replace servo amplifier.
9-31
E
Advertisement
