Mitsubishi Electric SV13/22 Programming Manual page 339

APPENDICES
Error
Code
Name
Excessive
2030
regeneration
2031 Overspeed
2032 Overcurrent
2033 Overvoltage
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Table 2.14 Servo Amplifier Error List (2000 to 2799) (Continued)
Error Cause
Description
• The frequency of ON/OFF switching of
the power transistor for regeneration is
too high. (Caution is required since the
regenerative resistor could overheat.)
• Servo parameter (system settings)
setting error
• Incorrect wiring of regenerative resistor
• Failure of regenerative resistor
• Power transistor for regeneration
damaged by short circuit
• The motor rpm has exceeded 115% of
the rated rpm.
• An overshoot has occurred because the
acceleration time constant is too small.
• An overshoot has occurred because the
servo system is unstable.
• Encoder fault.
• U, V, W in the servo amplifier outputs
have short circuited with each other.
• U, V, W in the servo amplifier outputs
have shorted to ground.
• Incorrect wiring of U, V, W phases in
the servo amplifier outputs.
• The servo amplifier transistor is
damaged.
• Failure of coupling between servomotor
and encoder
• Encoder cable failure
• A servomotor that does not match the
setting has been connected.
• The servomotor oscillated.
• Noise entered the overcurrent detection
circuit.
• The converter bus voltage has reached
400 V or more. (800VAC or more for
400VAC series servo)
• The frequency of acceleration and
deceleration was too high for the
regenerative ability.
• The regenerative resistor has been
connected incorrectly.
• The regenerative resistor in the servo
amplifier is destroyed.
• The power transistor for regeneration is
damaged.
• The power supply voltage is too high.
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Error
When Error Checked
Processing
At any time during operation Immediate stop
APP − 21
Corrective Action
• Reduce the frequency of acceleration and
deceleration or feed speed while checking the
servo monitor regeneration level (%).
• Reduce the load.
• Increase the servomotor capacity.
• Check the servo parameters (regenerative
resistor and motor type settings in the system
settings).
• Connect the regenerative resistor correctly.
• Replace the regenerative resistor.
• Replace the servo amplifier.
• Check the motor rpm in the servo parameters.
• Check if the number of pulses per revolution and
travel value per revolution in the fixed
parameters match the machine specifications.
• If an overshoot occurs during acceleration,
check the acceleration time and deceleration
time in the fixed parameters.
• If overshoot occurs, increase the speed integral
compensation by adjusting the position loop gain
/ position control gain 1, 2, speed loop gain /
speed control gain 1, 2 in the servo parameters.
• Check if the encoder cable is disconnected.
• Replace the servomotor.
• Check if there is a short circuit between U, V, W
of the servo amplifier outputs.
• Check if U, V, W of the servo amplifier outputs
have been grounded to the ground terminal.
Check if U, V, W of the servomotor are
grounded to the core.
If grounding is found, replace the servo amplifier
and/or motor.
• Correct the wiring.
• Replace the servo amplifier.
• Replace the servomotor.
• Replace the encoder cable.
• Check the connected motor set in the system
settings.
• Check and adjust the gain value set in the servo
parameters.
• Check if any relays or valves are operating in
the vicinity.
• Increase the acceleration time and deceleration
time in the fixed parameters.
• Check the connection between C and P of the
terminal block for the terminal block for
regenerative resistance.
• Measure between C and P of the terminal block
for regenerative resistance with a multimeter; if
abnormal, replace the servo amplifier. (Measure
about 3 minutes after the charge lamp has gone
out.)
• Replace the servo amplifier.
• Measure the input voltage (R, S, T) with a
voltmeter.