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10. TROUBLESHOOTING
10.2.3 Remedies for warnings
POINT
When any of the following alarms has occurred, do not resume operation by
switching power of the servo amplifier OFF/ON repeatedly. The servo amplifier
and servo motor may become faulty. If the power of the servo amplifier is
switched OFF/ON during the alarms, allow more than 30 minutes for cooling
before resuming operation.
Excessive regenerative warning (AL.E0)
Overload warning 1 (AL.E1)
If AL.E6 occurs, the servo off status is established. If any other warning occurs, operation can be continued but
an alarm may take place or proper operation may not be performed. Use the optional MR Configurator (servo
configuration software) to refer to the cause of the warning.
Display Name Definition Cause Action
AL.E0 Excessive
regenerative
warning
There is a possibility that
regenerative power may
exceed permissible
regenerative power of
built-in regenerative
resistor or regenerative
option.
Regenerative power increased to 85
or
more of permissible regenerative power of
built-in regenerative resistor or regenerative
option.
Checking method
Call the status display and check
regenerative load ratio.
1. Reduce frequency of
positioning.
2. Change regenerative option for
the one with larger capacity.
3. Reduce load.
AL.E1 Overload warning There is a possibility that
overload alarm 1 or 2 may
occur.
Load increased to 85
or more of overload
alarm 1 or 2 occurrence level.
Cause, checking method
Refer to AL.50, 51.
Refer to AL.50, AL.51.
AL.E6 Servo emergency
stop warning
EMG-VIN are open. External emergency stop was made valid.
(EMG-VIN opened.)
Ensure safety and deactivate
emergency stop.
AL.E9 Undervoltage
warning
This alarm occurs when
the servo motor speed
decreases to or below
50r/min with the bus
voltage dropping.
Check the power supply.
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