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MELSEC-Q
15 TROUBLESHOOTING
Related buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
Error
check
timing
Error
process-
ing
Check point Corrective action
Connect correctly.
Change the servomotor.
— — — —
Repair or change the cable.
Servo amplifier error (2024)
occurs if the servo is switched
on after disconnecting the U, V,
W power cables from the servo
amplifier.
Connect correctly.
Change the cable.
— — — —
Always
Change the servo amplifier.
After leaving the alarm occurring for
few minutes, switch power off, then
on again.
Always make OPR setting again.
Change the battery.
Always make OPR setting again.
— — — —
After leaving the alarm occurring for
few minutes, switch power off, then
on again.
Always make OPR setting again.
Regenerative brake option
30102 30302 30502 30702
Set correctly.
— — — —
Connect correctly
— — — —
Call the status display and
check the regenerative load
ratio.
• Reduce the frequency of
positioning.
• Use the regenerative brake option
of larger capacity.
• Reduce the load.
Review power supply.
— — — —
Change servo amplifier or
regenerative brake option.
— — — —
Always
Imme-
diate
stop
• The regenerative brake option
has overheated abnormally.
• Servo amplifier error (2030)
occurs even after removal of
the built-in regenerative brake
resistor or regenerative brake
option.
Change the servo amplifier.
:
The error check timing is shown below.
• When servo amplifier is power ON.
• When the QD75MH detects the rising edge (OFF
ON) of the PLC READY signal [Y0].
• When servo amplifier is reset.
• When the QD75MH is power ON.