Main Circuit Off Warning; Output Watt Excess Warning; Tough Drive Warning - Mitsubishi Electric MELSERVO-JE Instruction Manual

1. SERVO AMPLIFIER TROUBLESHOOTING
Alarm No.: E9 Name: Main circuit off warning
Alarm content
Detail
Detail name
No.
E9.1 Servo-on signal (1) The bus voltage is less
on during main
circuit off
(2) The servo amplifier is
E9.2 Bus voltage (1) The bus voltage
drop during low
speed
operation
E9.3 Ready-on Check it with the check method for [AL. E9.1].
signal on
during main
circuit off
Alarm No.: EC Name: Overload warning 2
Alarm content
Detail
Detail name
No.
EC.1 Overload (1) The load is too large or
warning 2
Alarm No.: ED Name: Output watt excess warning
Alarm content
Detail
Detail name
No.
ED.1 Output watt (1) The status, in which the
excess warning
Alarm No.: F0 Name: Tough drive warning
Alarm content
Detail
Detail name
No.
F0.1 Instantaneous (1) The power supply
power failure
tough drive
warning
F0.3 Vibration tough (1) The setting value of the
drive warning
The servo-on command was inputted during power-off.
The bus voltage dropped while the servo motor was rotating at 50 r/min or less.
Cause
Check the bus voltage. It is less than 215 V
than 215 V DC.
Check the bus voltage
malfunctioning. value.
Check the bus voltage. It is less than 200 V
dropped while the servo
motor was rotating at 50
r/min or less.
Operations over the rated output were repeated while the servo motor shaft was not rotated.
Cause
Check the effective
the capacity is not load ratio.
enough.
The status, in which the output wattage (speed × torque) of the servo motor exceeds the rated output,
continued steadily.
Cause
Check the servo
output wattage (speed motor speed and
× torque) of the servo torque.
motor exceeds 120% of
the rated output,
continued steadily.
The tough drive function was activated.
Cause
Check it with the check method for [AL. 10.1].
voltage dropped.
Check if it was
machine resonance changed frequently.
suppression filter was
changed due to a
machine resonance.
Check method Check result
DC.
The power supply
voltage is 160 V AC
or more, but the bus
voltage is less than
200 V DC.
DC.
Check method Check result
The effective load
ratio is high.
Check method Check result
The output wattage
is 120% of the
rating.
Check method Check result
It was changed
frequently.
1 - 53
Action Target
Review the wiring. [A]
Check the power [B]
supply capacity. [C]
Replace the servo
amplifier.
Review the power
supply capacity.
Increase the
acceleration time
constant.
Action Target
Reduce the load. [A]
Replace the servo [B]
motor with a larger [C]
capacity one.
Action Target
Reduce the servo [A]
motor speed. [B]
Reduce the load. [C]
Action Target
[A]
[B]
[C]
Set the machine
resonance
suppression filter.
Check the machine
status for screw
looseness or others.