Mitsubishi Electric MELSERVO-JN Series, Инструкция по эксплуатации

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8. TROUBLESHOOTING
Alarm No.: A.E9 Name: Main circuit off warning The servo motor stops.
Warning contents
Servo-on (SON) was switched on when the main circuit power is off.
The bus voltage decreased while the servo motor speed operates at 50r/min or slower.
Detailed
display
Detailed
Name
Cause Checking method Result Action
E9.3 Main circuit
power supply
failure 1) When the set value of
parameter No. PC29
(function selection C-5) is
" 1 ", the main circuit
power supply turned OFF
while the servo motor
operates at 50r/min or
slower.
Check if the main
circuit power supply is
input. Not input. Switch on the main circuit
power.
Input. Check 2).
2) When the set value of
parameter No. PC29
(function selection C-5) is
" 1 ", the connector of
the main circuit power
supply came off when the
servo motor operates at
50r/min or slower.
Check the main circuit
power supply
connector. The connector is
disconnected. Connect properly.
No problem. Check 3).
3) When the set value of
parameter No. PC29
(function selection C-5) is
" 1 ", the
instantaneous power
failure occurred while the
servo motor operates at
50r/min or slower.
Check the main circuit power.
Alarm No.: A.EC Name: Overload warning 2 The servo motor does not stop.
Warning contents
Operation, in which a current exceeding the rating flowed intensively in any of the U, V and W phases of
the servo motor, was repeated.
Detailed
display
Detailed
Name
Cause Checking method Result Action
EC.1 Overload
warning 2
1) Current flowed intensively
and continuously into a
specific phase of the servo
motor.
Check if the alarm
occurs after changing
the stop position. Alarm does not
occur. Reduce the frequency of
positioning.
Alarm occurs. Check 2).
2) The load is large, or the
capacity is insufficient.
Measure the effective
load ratio during a stop
by using the status
display or MR
Configurator. Effective load ratio
is too high. Reduce the load.
Replace the servo amplifier
and servo motor with the
ones with larger capacity.
Alarm No.: A.ED Name: Output watt excess warning The servo motor does not stop.
Warning contents
The status, in which the output wattage (speed torque) of the servo motor exceeded the rated output,
continued steadily.
Detailed
display
Detailed
Name
Cause Checking method Result Action
ED.1 Output
wattage over
1) Output wattage of the
servo motor (speed
torque) exceeded 120% of
the rated output.
Call the status display
or MR Configurator and
check the servo motor
speed and torque. The output wattage
is 120% or more of
the rate. Reduce the servo motor
speed.
Reduce the load.