Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 34)

Chapter 4: Troubleshooting PC NC Maintenance Manual
4-13
(6) Alarm Numbers 3111 to3115 (Servo Communication Alarm)
Probable causes of this alarm are a broken YENET1 200 commu-
nication cable, loose cable connection and communication pro-
cessing error.
The servo unit detects the alarm.
Contact a Yaskawa customer service representative after making
sure that the cable is securely connected.
(7) Alarm Numbers 3121 to 3125 (Excessive Speed)
This alarm occurs if the motor speed exceeds 4950 r/rein or the
value set for the parameter.
The servo unit detects the alarm.
Check whether the connection to the encoder is correct.
Contact a Yaskawa customer service representative.
(8) Alarm Numbers 3141 to 3145 (Overrun, Run-away Prevention)
The encoder will be faulty.
The servo unit detects the alarm.
Contact a Yaskawa customer service representative.
(9) Alarm Numbers 3151 to 3155 (Phase Detection Error)
The encoder signal cable or the encoder itself will be faulty.
The servo unit detects the error.
Contact a Yaskawa customer service representative.
(10) Alarm Numbers 3161 to3165 (Absolute Error)
This alarm occurs if the absolute value data cannot be received
correctly in one to two seconds after turning ON the power to the
encoder.
The servo unit detects the error.