Mitsubishi Electric MELSEC-Q QD75M User Manual page 705

15 TROUBLESHOOTING
LED
Classifi-
Error indicator
cation of
code of servo
errors
amplifier
2050 50
2051 51
Servo
amplifier
errors
2052 52
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
Overload 2
successively for several seconds.
Servomotor locked: 1s or more
Droop pulse of the deviation counter
reached or exceeded setting
Error excessive
value(Initial value: 80kPLS) of the
parameter Pr.131 .
Description
15 - 42
MELSEC-Q
Cause
The motor encoder fault.
Collision with the machine.
Servo motor miswiring servo
amplifier terminals U, V, W phase
do not mach motor terminals U, V,
W phase.
The servo system is unstable,
causing hunting.
The bus voltage of the unit has
decreased.
Encoder faulty.
Acceleration/deceleration time
constant too small.
Torque limit value too small.
Start disabled due to insufficient
torque caused drop in power supply
voltage.
The setting value for " Pr.113
Position control gain 1" too small.