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9. TROUBLESHOOTING
Display
Name
Definition
Cause
Action
AL.E1 Overload
warning 1
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.
Refer to AL.50, AL.51.
AL.E3 Absolute position
counter warning
Absolute position encoder
pulses faulty.
1. Noise entered the encoder.
Take noise suppression
measures.
2. Encoder faulty.
Change the servo motor.
The multi-revolution
counter value of the
absolute position encoder
exceeded the maximum
revolution range.
3. The travel distance from the home
position exceeded a 32767 rotation or
37268 rotation in succession.
Make home position setting
again.
AL.E5 ABS time-out
warning
1. PC or PLC…etc ladder program
incorrect.
Contact the program.
2. Reverse rotation start (ST2)
Limiting
torque (TLC) improper wiring
Connect properly.
3. If you are using in the ABS transfer
(Parameter No. PA03 is set to "0001")
by the DIO, CN1-22 pin (ABSB0 during
ABS transfer mode) and CN1-23 pin
(ABSB1 during ABS transfer mode),
CN1-25 pin (ABST during ABS transfer
mode) of false connection.
Connect properly.
AL.E6 Servo emergency
stop warning
EMG is off.
External emergency stop was made valid.
(EMG was turned off.)
Ensure safety and deactivate
emergency stop.
AL.E8 Cooling fan
speed reduction
warning
The speed of the driver
decreased to or below the
warning level.
1. Cooling fan life expiration (Refer to
section 2.5.)
Change the cooling fan of the
driver.
2. The power supply of the cooling fan is
broken.
Change the driver.
3. Foreign matter is caught in the cooling
fan and decreased speed.
Remove the foreign matter.
AL.E9 Main circuit off
warning
Servo-on (SON) was
switched on with main
circuit power off.
Switch on main circuit power.
AL.EA ABS servo-on
warning
Servo-on (SON) turned
on more than 1s after
driver had entered
absolute position data
transfer mode.
1. PC or PLC…etc ladder program
incorrect.
1. Correct the program.
2. Servo-on (SON) improper wiring.
2. Connect properly.
AL.EC Overload warning
2
Operation, in which a
current exceeding the
rating flew intensively in
any of the U, V and W
phases of the servo
motor, was repeated.
During a stop, the status in which a current
flew intensively in any of the U, V and W
phases of the servo motor occurred
repeatedly, exceeding the warning level.
1. Reduce the positioning
frequency.
2. Reduce the load.
3. Replace the driver /
servo motor with the one of
larger capacity.
AL.ED Output watt
excess warning
The status, in which the
output wattage (speed
torque) of the servo motor
exceeded the rated output,
continued steadily.
Continuous operation was performed with
the output wattage (speed
torque) of the
servo motor exceeding 150% of the rated
output.
1. Reduce the servo motor
speed.
2. Reduce the load.
3. Replace the driver /servo
motor with one of larger
capacity.