11-9
11-3 Alarm List
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
  11
Troubleshooting and Maintenance
*1. An immediate stop means an alarm causing an immediate stop when the Pn510 "Stop Selection for 
Alarm Detection" is set to 4 to 7. For details, refer to "Stop Selection for Alarm Detection"(P.8-51).
55
0
Phase-A connection error An error was detected in the external 
encoder phase A connection.
√−−
1
Phase-B connection error An error was detected in the external 
encoder phase B connection.
√−−
2
Phase-Z connection error An error was detected in the external 
encoder phase Z connection.
√−−
87 0
Emergency stop input 
error
An emergency stop input signal 
(STOP) was input.
−√−
95
0 to 
4
Motor non-conformity The combination of the Servomotor 
and Servo Drive is not appropriate.
−−−
99 0
Other errors  The control circuit malfunctioned due 
to excess noise or some other 
problem.
 An alarm clear operation was 
performed when safety input 1 or 
safety input 2 was not in the normal 
status (i.e., when the input 
photocoupler was not ON).
√−−
Other 
numbers
Alarm 
number
Error detection function
Detection details and probable 
cause
Attribute
Main Sub
History
Can be 
cleared
Immediate 
stop *1