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10. TROUBLESHOOTING
No. Start-up sequence Fault Investigation Possible cause Reference
4 Cyclic operation Position shift occurs Confirm the cumulative
command pulses, cumulative
feedback pulses and actual
servo motor position.
Pulse counting error, etc.
due to noise.
10.2 When alarm or warning has occurred
POINT
Configure up a circuit which will detect the trouble (ALM) signal and turn off the
servo-on (SON) at occurrence of an alarm.
10.2.1 Alarms and warning list
When a fault occurs during operation, the corresponding alarm or warning is displayed. If any alarm or warning
has occurred, refer to section 10.2.2 or 10.2.3 and take the appropriate action. When an alarm occurs, ALM
turns off.
After its cause has been removed, the alarm can be deactivated in any of the methods marked
in the alarm
deactivation column.
Display
(Note 4)
Alarm code
Name
Alarm deactivation
ACD3
(bit3)
ACD2
(bit2)
ACD1
(bit1)
ACD0
(bit0)
Power
OFF
ON
(Note3)
MR
Configurator
parameter unit
(Note2)
Alarm reset
(RES)
Alarms
A10 0 0 1 0 Undervoltage
A12 0 0 0 0 Memory error 1
A13 0 0 0 0 Clock error
A15 0 0 0 0 Memory error 2 (EEP-ROM)
A16 0 1 1 0 Encoder error 1 (At power on)
A17 0 0 0 0 Board error
A19 0 0 0 0 Memory error 3 (Flash-ROM)
A1A 0 1 1 0 Motor combination error
A20 0 1 1 0 Encoder error 2
A24 1 1 0 0 Main circuit error
A25 1 1 1 0 Absolute position erase
A30 0 0 0 1 Regenerative error (Note 1) (Note 1) (Note 1)
A31 0 1 0 1 Overspeed
A32 0 1 0 0 Overcurrent
A33 1 0 0 1 Overvoltage
A35 1 1 0 1 Command pulse frequency alarm
A37 1 0 0 0 Parameter error
A45 0 0 1 1 Main circuit device overheat (Note 1) (Note 1) (Note 1)
A46 0 0 1 1 Servo motor overheat (Note 1) (Note 1) (Note 1)
A47 0 0 1 1 Cooling fan alarm
A50 0 0 1 1 Overload 1 (Note 1) (Note 1) (Note 1)
A51 0 0 1 1 Overload 2 (Note 1) (Note 1) (Note 1)
A52 0 1 0 1 Error excessive
A61 0 1 0 1 Operation alarm
A8A 0 0 0 0 Serial communication time-out
A8E 0 0 0 0 Serial communication error
888 0 Watchdog
Note 1. Deactivate the alarm about 30 minutes of cooling time after removing the cause of occurrence.
2. Turns on RES.
3. Clicking the "Alarm reset" button on the "Alarm display" screen of MR Configurator allows an alarm to be deactivated.
Pressing the "STOP RESET" key of the parameter unit allows an alarm to be deactivated.
4. 0: OFF
1: ON