Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 35)

PC NC Maintenance Manual Chapter 4: Troubleshooting
4-14
The encoder or the servo unit will be faulty.
Contact a Yaskawa customer service representative.
(11) Alarm Numbers 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 a Yaskawa customer service representative.
(12) Alarm Number 3201 (Inverter Alarm)
This alarm occurs when the NC unit detects the alarm signal out-
put from the inverter.
Check the contents of the alarm by displaying the servo alarm dis-
play screen (press [F2] of the alarm job in the common process.).
(13) Alarm Numbers 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 a Yaskawa customer service representative.
(14) Alarm Numbers 3301 to 3305 (Overcurrent)
The servo unit detects the alarm.
The servo unit may be faulty if the alarm occurs before the opera-
tion is started after turning the power ON.
If the alarm occurs during operation, a ground fault of the motor
is the cause.