11-6
11-3 Alarms
OMNUC G5-Series AC Servo Drives Users Manual (Built-in MECHATROLINK-II communications type)
11
Error and Maintenance
11-3 Alarms
If the Servo Drive detects an error, it outputs an alarm (ALM), turns off the power drive circuit,
and displays the error number on the front panel.
Precautions for Correct Use
Refer to "Error Diagnosis Using the Alarm Displays" (P.11-14) for appropriate alarm measures.
Reset the alarm using one of the following methods. Remove the cause of the alarm first.
• Turn OFF the power supply, then turn it ON again.
• Reset the alarm via MECHATROLINK-II communications or on CX-Drive.
However, some alarms can only be reset by turning the power supply OFF then ON again. Refer
to the "Alarm List" (P.11-6).
If you reset an alarm while the operation command (RUN) is turned ON, the Servo Drive starts
operation as soon as the alarm is released, which is dangerous. Be sure to turn OFF the RUN
before clearing the alarm.
If the RUN is always ON, first check safety sufficiently before clearing the alarm.
The Overload (Alarm No.16) cannot be reset for 10 seconds once it occurs.
Any displays such as hh, , and HH on the error number mean internal malfunction on the MPU.
Cut off the power immediately when you encounter such a case.
Alarm List
Alarm
number
Error detection function
Detection details and
probable cause
Attribute
Main Sub
History
Can be
reset
Emergency
stop *1
11 0
Control power supply
undervoltage
The DC voltage of the control circuit is
below the specified value.
12 0
Overvoltage The DC voltage in the main circuit is
abnormally high.
13
0
Main power supply
undervoltage
(Insufficient voltage
between P and N)
The DC voltage of the main circuit is
low.
1
Main power supply
undervoltage
(AC cut-off detection)
A location was detected where the
main circuit AC power supply is cut off.
14
0 Overcurrent Overcurrent flowed to the IGBT.
1
IPM error Motor power line ground fault or short
circuit.
15 0
Servo Drive overheat The temperature of the Servo Drive
radiator exceeded the specified value.
16 0
Overload Operation was performed with torque
significantly exceeding the rating for
several seconds to several tens of
seconds.
*2
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