YASKAWA SGM series User Manual page 361

Cause
A Servomotor wiring incorrect.
B Encoder wiring incorrect (disconnection,
shortcircuit, power supply, etc.)
C Servopack adjustment incorrect
D Servomotor overloaded
E Position reference pulse frequency too
high
F Circuit board (1PWB) defective.
Display and Outputs
Digital Operator g p
Display and Di l d
Alarm Name Alarm Name
ALO1
A.40
OFF
Overvoltage
Status When Alarm Occurred
During servomotor
operation
During motor
deceleration
During normal
operation
Cause
A Load inertia high and motor speed too high
B Load exceeds capacity of regenerative unit
C Servomotor speed too high
D Servopack defective
E Input voltage too high
F Circuit board (1PWB) defective.
Check and correct wiring. (Check A-, B-,
C-phase pulses correct at 2CN.) C h
Increase speed loop gain (Cn-04) and/or
position loop gain (Cn-1A).
Reduce load torque and inertia. Otherwise,
replace with larger capacity servomotor.
• Decrease reference pulse frequency.
• Use smoothing function.
• Change electronic gear ratio.
Replace Servopack.
Alarm Output
Alarm Code Output
ALO2
OFF ON
At power ON
A
, D
B C
, , D
• Change operating conditions.
• Use regenerative unit.
• If multiple units are used, connect all P, N
terminals in parallel.
Change operating conditions.
Reduce motor speed.
Replace Servopack.
Change input voltage to normal value.
Replace Servopack.
6.2 Troubleshooting
Remedy
g ( ,
l 2CN )
Alarm Output p
ALO3
OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
E F
,
Remedy
351
,
6