Mitsubishi Electric Q172CPU Programming Manual page 594

APPENDICES
Error
code
Name
• 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)
Excessive
2030
setting error.
regeneration
• Incorrect wiring of regenerative
resistor.
• Regenerative resistor fault.
• Power transistor for regeneration
damaged by short circuit.
• The motor speed exceeded 115[%] or
more of the rated speed.
• An overshoot occurred because the
acceleration/deceleration time
constant is too small.
2031 Overspeed
• An overshoot occurred because the
servo system is unstable.
• Encoder fault.
Table 2.13 Servo error (2000 to 2799) list (Continued)
Error cause
Description
Error check
processing
Any time during Immediate
operation
APP - 33
Error
Corrective action
• Reduce the frequency of
acceleration and deceleration or
feed speed while checking the
servomotor 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 speed in the
servo parameters.
stop
• Check if the number of pulses
per revolution and travel value
per revolution in the fixed
parameters match the machine
system.
• If an overshoot occurs during
acceleration/deceleration, check
the acceleration/deceleration
time in the fixed parameters.
• Adjust the position loop
gain/position control gain 1, 2 or
speed loop gain/speed control
gain 1, 2 of the servo
parameters, or increase the
speed differential compensation
of the servo parameters.
• Check the encoder cable for wire
breakage.
• Replace the servomotor.