8. TROUBLESHOOTING
8 - 1
8. TROUBLESHOOTING
POINT
Refer to MELSERVO-J4 Servo Amplifier Instruction Manual (Troubleshooting)
for details of alarms and warnings.
As soon as an alarm occurs, turn SON (Servo-on) off and interrupt the power.
When an error occurs during operation, the corresponding alarm or warning is displayed. When the alarm or
the warning occurs, refer to MELSERVO-J4 Servo Amplifier Instruction Manual (Troubleshooting) to remove
the failure. When an alarm occurs, ALM will turn off.
To output alarm codes, set [Pr. PD34] to "_ _ _ 1". Alarm codes are outputted by on/off of bit 0 to bit 2.
Warnings ([AL. 91] to [AL. F3]) do not have alarm codes. The alarm codes in the following table will be
outputted when they occur. The alarm codes will not be outputted in normal condition.
After its cause has been removed, the alarm can be deactivated in any of the methods marked ż in the
alarm deactivation column. Warnings are automatically canceled after the cause of occurrence is removed.
For the alarms and warnings written "SD" in the stop method column, the axis stops with the dynamic brake
after forced stop deceleration. For the alarms and warnings written "DB" in the stop method column, the axis
stops with the dynamic brake without forced stop deceleration.
Table 8.1 Alarm list
Alarm code Alarm deactivation
No.
CN1
22
(Bit 2)
CN1
23
(Bit 1)
CN1
24
(Bit 0)
Name
Detail
display
Detail name
Stop
method
(Note 2,
3)
Alarm
reset
(RES)
Press
the
"SET"
button
on the
current
alarm
screen
.
Power
offĺo
n
10.1 Voltage drop in the control power DB
10 0 1 0 Undervoltage
10.2 Voltage drop in the main circuit power SD
12.1 RAM error 1 DB
Alarm
12.2 RAM error 2 DB
12 0 0 0 Memory error 1 (RAM)
12.4 RAM error 4 DB
12.5 RAM error 5 DB
13.1 Clock error 1 DB
13 0 0 0 Clock error
13.2 Clock error 2 DB
14.1 Control process error 1 DB
14.2 Control process error 2 DB
14.3 Control process error 3 DB
14.4 Control process error 4 DB
14.5 Control process error 5 DB
14 0 0 0 Control process error
14.6 Control process error 6 DB
14.7 Control process error 7 DB
14.8 Control process error 8 DB
14.9 Control process error 9 DB
14.A Control process error 10 DB
15.1 EEP-ROM error at power on DB
15 0 0 0
Memory error 2 (EEP-
ROM)
15.2 EEP-ROM error during operation DB
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