Yaskawa MP940 - Manual (Page 393)

SERVOPACK Inspection, Maintenance, and Troubleshooting
10.2.1 Troubleshooting Problems with Alarm Displays
10-26
Status and Remedy for Alarm
„ A.E0
A.E0: No Response
Display and Outputs
Note: OFF: Output transistor is OFF (alarm state).
ON: Output transistor is ON.
Cause Remedy
A Servomotor wiring incorrect or
poor connection Check wiring and connectors at encoder.
B SERVOPACK was not correctly
adjusted. Increase speed loop gain (Pn100) and position
loop gain (Pn102).
C Motor load was excessive. Reduce load torque or moment of inertia. If
problem not corrected, replace with a motor
with larger capacity.
D Position reference pulse frequency
was too high. • Increase or decrease reference pulse fre-
quency.
• Add smoothing function.
• Correct electronic gear ratio.
E Circuit board (1PWB) defective. Replace SERVOPACK.
Alarm Outputs
Alarm Code Outputs
ALM Output
ALO1 ALO2 ALO3
OFF ON ON OFF
E
A
E
B,C,D
During servomotor
operation
Overflow occurs
during high speed
rotation
Operation is normal, but
overflow occurs when
long reference is input.
Reference pulse is input
properly, but feedback
pulse is not returned.
At power ON