Mitsubishi Electric MR-J3-10B Instruction Manual page 149

8. TROUBLESHOOTING
Display Name
92 Open battery
cable warning
96 Home position
setting warning
9F Battery warning
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E0 Excessive
regenerative
warning
E1 Overload warning
1
E3 Absolute position
counter warning
E4 Parameter
warning
E6 Servo forced stop
warning
E7 Controller forced
stop warning
E8 Cooling fan speed
reduction warning
E9 Main circuit off
warning
EC Overload warning
2
ED Output watt
excess warning
Definition
Absolute position detection 1. Battery cable is open.
system battery voltage is
2. Battery voltage supplied from the servo
low.
amplifier to the encoder fell to about 3V or
less.
(Detected with the encoder)
Home position setting 1. Droop pulses remaining are greater than
could not be made. the in-position range setting.
2. Command pulse entered after clearing of
droop pulses.
3. Creep speed high.
Voltage of battery for Battery voltage fell to 3.2V or less.
absolute position detection (Detected with the servo amplifier)
system reduced.
There is a possibility that Regenerative power increased to 85% or
regenerative power may more of permissible regenerative power of
exceed permissible built-in regenerative brake resistor or
regenerative power of regenerative brake option.
built-in regenerative brake
resistor or regenerative
brake option.
There is a possibility that Load increased to 85% or more of overload
overload alarm 1 or 2 may alarm 1 or 2 occurrence level.
occur.
Absolute position encoder 1. Noise entered the encoder.
pulses faulty.
2. Encoder faulty.
The multi-revolution 3. The movement amount from the home
counter value of the position exceeded a 32767 rotation or
absolute position encoder -37268 rotation in succession.
exceeded the maximum
revolution range.
Parameter outside setting Parameter value set from servo system
range controller is outside setting range
EM1 is off. External forced stop was made valid. (EM1
was turned off.)
Forced stop signal was entered into the
servo system controller.
The speed of the servo Cooling fan life expiration (Refer to Section
amplifier decreased to or 2.5.)
below the warning level.
This warning is not
displayed with MR-J3-
The power supply of the cooling fan is
70B/100B among servo
broken.
amplifiers equipped with a
cooling fan.
Servo-on command was
issued with main circuit
power off.
Operation, in which a During a stop, the status in which a current
current exceeding the flew intensively in any of the U, V and W
rating flew intensively in phases of the servo motor occurred
any of the U, V and W repeatedly, exceeding the warning level.
phases of the servo motor,
was repeated.
The status, in which the Continuous operation was performed with
output wattage (speed the output wattage (speed
torque) of the servo motor servo motor exceeding 150% of the rated
exceeded the rated output, output.
continued steadily.
Cause
Checking method
Call the status display and check
regenerative load ratio.
Cause, checking method
Refer to 50,51.
torque) of the
8 - 8
Action
Repair cable or changed.
Change battery.
Remove the cause of droop pulse
occurrence
Do not enter command pulse
after clearing of droop pulses.
Reduce creep speed.
Change the battery.
1. Reduce frequency of
positioning.
2. Change regenerative brake
option for the one with larger
capacity.
3. Reduce load.
Refer to 50, 51.
Take noise suppression
measures.
Change servo motor.
Make home position setting
again.
Set it correctly.
Ensure safety and deactivate
forced stop.
Ensure safety and deactivate
forced stop.
Change the cooling fan of the
servo amplifier.
Change servo amplifier.
Switch on main circuit power.
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.
1. Reduce the servo motor
speed.
2. Reduce the load.