Instruction manual

9 - 8
9. TROUBLESHOOTING
Display Name Definition Cause Action
1. Droop pulses remaining are greater than
the in-position range setting.
Remove the cause of droop pulse
occurrence
2. Command pulse entered after clearing of
droop pulses.
Do not enter command pulse
after clearing of droop pulses.
AL.96 Home position
setting warning
Home position setting
could not be made.
3. Creep speed high. Reduce creep speed.
AL.99 Stroke limit
warning
The sutroke end (LSP or
LSN) of the direction which
gave instructions was
turned off.
The limit switch became valid. Reexamine the operation pattern
to turn LSP/LSN ON.
AL.9F Battery warning Voltage of battery for
absolute position detection
system reduced.
Battery voltage fell to 3.2V or less.
(Detected with the servo amplifier)
Change the battery.
AL.E0 Excessive
regenerative
warning
There is a possibility that
regenerative power may
exceed permissible
regenerative power of
built-in regenerative brake
resistor or regenerative
brake option.
Regenerative power increased to 85% or
more of permissible regenerative power of
built-in regenerative brake resistor or
regenerative brake option.
Checking method
Call the status display and check
regenerative load ratio.
1. Reduce frequency of
positioning.
2. Change regenerative brake
option for the one with larger
capacity.
3. Reduce load.
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.
Cause, checking method
Refer to AL.50,51.
Refer to AL.50, AL.51.
1. Noise entered the encoder. Take noise suppression
measures.
AL.E3 Absolute position
counter warning
Absolute position encoder
pulses faulty.
2. Encoder faulty. Change servo motor.
The multi-revolution
counter value of the
absolute position encoder
exceeded the maximum
revolution range.
3. The movement amount from the home
position exceeded a 32767 rotation or
37268 rotation in succession.
Make home position setting
again.
1. PC lader program wrong. Contact the program.AL.E5 ABS time-out
warning
2. Reverse rotation start (ST2)
Limiting
torque (TLC) improper wiring
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.
Cooling fan life expiration (Refer to Section
2.5.)
Change the cooling fan of the
servo amplifier.
AL.E8 Cooling fan speed
reduction warning
The speed of the servo
amplifier decreased to or
below the warning level.
This warning is not
displayed with MR-J3-
70A/100A among servo
amplifiers equipped with a
cooling fan.
The power supply of the cooling fan is
broken.
Change servo amplifier.
AL.E9 Main circuit off
warning
Servo-on (SON) was
switched on with main
circuit power off.
Switch on main circuit power.
1. PC ladder program wrong. 1. Correct the program.AL.EA ABS
servo-on warning
Servo-on (SON) turned on
more than 1s after servo
amplifier had entered
absolute position data
transfer mode.
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 at the specific
positioning address.
2. Reduce the load.
3. Replace the servo amplifier/
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.