YASKAWA SGM series User Manual page 374

INSPECTION, MAINTENANCE AND TROUBLESHOOTING
6.2.1 Troubleshooting Problems with Alarm Display cont.
6
Note
364
Display and Outputs
Digital Operator g p
Display and Di l d
Alarm Name Alarm Name
ALO1
A.F3
OFF
Power loss error
Status When Alarm Occurred
At power ON
A Time between turning power OFF and back
ON was shorter than the power holding
time.
B If any of the following power supply
conditions are met during motor operation:
• Complete power failure : half cycle of sup-
ply frequency
• Voltage drop: full cycle of supply frequency
Note Because of detector lag and detector
margin, power loss of 30 to 55 ms
does not cause an alarm.
Display and Outputs
Digital Operator g p
Display and Di l d
Alarm Name Alarm Name
ALO1
CPF00
Not specified
Digital operator
transmission
error 1
This alarm is not stored in alarm trace-back function memory.
Status When Alarm Occurred
At power ON. Digital op-
erator connected before
Servopack power turned
ON.
A Cable defective or poor contact between
digital operator and Servopack.
B Malfunction due to external noise
C Digital operator defective
D Servopack defective
Alarm Output
Alarm Code Output
ALO2
ON
During servomotor
A
operation
Cause
After turning power OFF, wait more than
the power holding time (6 to 15 s,
according to type) before turning the power
back ON.
Check the power supply.
Terms
• Complete power failure=Power failure
• Voltage drop=Power failure where voltage
Alarm Output
Alarm Code Output
ALO2
Digital operator con-
A B C D
nected to Servopack
, , ,
while power turned ON.
Cause
• Check connector connections.
• Replace cable.
Separate digital operator and cable from
noise source.
Replace digital operator.
Replace Servopack.
Alarm Output
ALO3
OFF OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
B
Remedy
where voltage drops to zero.
drops, but not to zero.
Alarm Output
ALO3
A B C
, ,
Remedy
p
p
D
,