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MELSEC-Q
15 TROUBLESHOOTING
Related buffer memory address
Axis 1 Axis 2 Axis 3 Axis 4
Check point Corrective action
— — — —
• Change lead.
• Connect correctly.
Regenerative brake option
30102 30202 30302 30402
Connect correctly.
• Change lead.
• Connect correctly.
Change the servo amplifier.
• For wire breakage of built-in regenerative brake
resistor, change the servo amplifier.
• For wire breakage of regenerative brake option,
change regenerative brake option.
Add regenerative brake option or increase
capacity.
— — — —
Review the power supply.
Connect correctly.
Change the SSCNET cable.
Take measures against noise.
Connect terminal connector.
— — — —
Set correctly.
Review operation program.
Take measures against noise.
— — — —
Change QD75M.
Connect the connector of the SSCNET cable.
Change the SSCNET cable.
Change the servo amplifier.
— — — —
Connect terminal connector.
Change the servo amplifier.
— — — —
Change the parameter value to within the setting
range.
Review environment so that ambient temperature
is 0 to 40°C.
• Reduce load.
• Review operation pattern.
• Use servomotor that provides larger output.
— — — —
Change the servomotor.