9 - 9
9. TROUBLESHOOTING
Display Name
Definition
Cause
Action
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 ladder 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.
Summary of Contents for MELSERVO MR-J3 A Series
Page 15: ...A 14 MEMO ...
Page 225: ...7 12 7 GENERAL GAIN ADJUSTMENT MEMO ...
Page 241: ...8 16 8 SPECIAL ADJUSTMENT FUNCTIONS MEMO ...
Page 251: ...9 10 9 TROUBLESHOOTING MEMO ...
Page 263: ...10 12 10 OUTLINE DRAWINGS MEMO ...