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15 TROUBLESHOOTING
LED
Classifica
Error
indicator
tion of
code
of servo
errors
amplifier
2050
50
Servo
amplifier
errors
2051
51
Error name
Load exceeded overload protection
characteristic of servo amplifier.
Overload 1
Load ratio 300%: 2.5s or more
Load ratio 200%: 100s or more
Machine collision or the like caused
max. output current to flow
successively for several seconds.
Overload 2
Servomotor locked:
During rotation:
Description
1s or more
2.5s or more
15 - 46
MELSEC-Q
Cause
The current exceeded the
continuous output current of the
servo amplifier.
The servo system is unstable,
causing hunting.
Collision with the machine.
Servomotor miswiring servo
amplifier terminals U, V, W phase
do not mach motor terminals U, V,
W phase.
The motor encoder fault.
Collision with the machine.
Servomotor miswiring servo
amplifier terminals U, V, W phase
don't mach motor terminals U, V, W
phase.
The servo system is unstable,
causing hunting.
The motor encoder fault.
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