Yaskawa PC NC - Manual (Page 176)

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YASNAC PCNC Operating Manual Chapter 4: Maintenance
(11)Alarm Nos.: 3181 to 3185 (Absolute Position Error)
The number of feedback pulses is checked every turn of the encoder, and this alarm occurs if
there is an error in the number of pulses counted.
The servo unit detects the alarm.
The encoder or the servo unit will be faulty, or malfunction could have occurred due to noises.
Contact your Yaskawa representative.
(12)Alarm No.: 3201 (Inverter Alarm)
This alarm occurs when the NC unit detects the alarm signal output from the inverter.
Check the contents of the alarm by displaying the servo alarm display screen (press [F2] of
the alarm job in the common process.).
(13)Alarm Nos.: 3281 to 3285, 3291 (YENET1 200 command time-out)
This alarm occurs when the YENET1200 communication lines fail to get ready.
The NC units detects the alarm.
The servo unit or the inverter unit is faulty.
Contact your Yaskawa representative.
(14)Alarm Nos.: 3301 to 3305 (Over Current)
The servo unit detects the alarm.
The servo unit will be faulty if the alarm occurs before the operation is started after turning
the power ON,
If the alarm occurs during operation, ground fault of the motor is the cause.
Contact your Yaskawa representative.
(15)Alarm Nos.: 3331 to 3335 (Over Voltage)
The servo unit detects the alarm.
If the alarm occurs when the power is turned ON to the spindle, the input voltage will be
too high.
If the alarm occurs during motor operation, it is necessary to review the operation conditions,
e.g., lower motor speed.
If the alarm occurs when the servo control power is turned ON, the servo unit will be faulty.
Contact your Yaskawa representative.
(16)Alarm Nos.: 3351 to 3355 (Heat Sink Overheat)
This alarm occurs when the heat sink temperature is abnormally high.