When An Alarm Or Warning Has Occurred - Mitsubishi Electric MELSERVO-J3 Series Instruction Manual

17. SPEED CONTROL OPERATION

17.9.4 When an alarm or warning has occurred

When an error occurs during operation, the corresponding alarm or warning is displayed as shown in the
following table. If any alarm or warning has occurred, refer to section 11.4.2 and 11.4.3 to take the appropriate
action. When an alarm occurs, malfunction (ALM) turns off.
After the cause of an alarm is removed, the alarm can be deactivated in any of the methods marked with
the alarm deactivation column. Warnings are automatically canceled after the cause of occurrence is removed.
To troubleshoot any problem without an alarm or warning, refer to section 17.9.6 to remove its cause.
Name
A10 Undervoltage
A12 Memory error 1 (RAM)
A13 Clock error
A15 Memory error 2 (EEP-ROM)
A16 Encoder error 1 (at power-on)
A17 Board error
A19 Memory error 3 (Flash-ROM)
A1A Motor combination error
A20 Encoder error 2 (during runtime)
A21 Encoder error 3 (during runtime)
A24 Main circuit error
A25 Absolute position erased
A30 Regenerative error
A31 Overspeed
A32 Overcurrent
A33 Overvoltage
A35 Command pulse frequency error
A37 Parameter error
A45 Main circuit device overheat
A46 Servo motor overheat
A47 Cooling fan error
A50 Overload 1
A51 Overload 2
A52 Error excessive
A61 Operation alarm
Serial communication time-out
A8A
error
A8D CC-Link communication error
A8E Serial communication error
888 Watchdog
Note 1. Wait for about 30 minutes as cooling time after removing the cause of occurrence, then deactivate the alarm.
2. Turns on RY(n+1)A or RY(n+3)A.
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.
POINT
As soon as an alarm occurs, turn the servo off, and shut off the main
circuit power.
Parameter error (A37) events and warning events are not recorded in the alarm
history.
Alarm deactivation
(Note 3)
Power
Configurator
supply
parameter
OFF→ON
(Note 1) (Note 1)
(Note 1) (Note 1)
(Note 1) (Note 1)
(Note 1) (Note 1)
(Note 1) (Note 1)
(Note 2)
MR
Alarm
reset
unit
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
17 - 62
Display Name
Home position return
A90
incomplete warning
Battery cable disconnection
A92
warning
A96 Home position setting warning
A98 Software limit warning
A99 Stroke limit warning
A9D CC-Link warning 1
A9E CC-Link warning 2
A9F Battery warning
Excessive regeneration
AE0
warning
AE1 Overload warning 1
Absolute position counter
AE3
warning
AE6 Servo forced stop warning
Cooling fan speed reduction
AE8
warning
AE9 Main circuit off warning
AEC Overload warning 2
AED Output watt excess warning
in