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15 TROUBLESHOOTING
LED indicator
Classifica
of servo
Error
tion of
amplifier
code
errors
IFU
2051
—
Servo
amplifier
errors
2052
—
Error name
DRU
Machine collision or the like
caused max. output current to
@A.51#
Overload 2
flow successively for several
seconds.
Droop pulse of the deviation
counter reached or exceeded
setting value (Initial value: 2
@A.52#
Error excessive
rotation) of the parameter
" Pr.131 ".
Description
Servomotor locked: 0.3s
15 - 86
MELSEC-Q
Cause
Collision with the machine
Servomotor miswiring drive unit
terminals U, V, W phase don't mach
motor terminals U, V, W phase.
Wrong connection of servomotor.
Drive unit's output U, V, W do not
match servo motor's input U, V, W.
The servo system is unstable,
causing hunting.
The motor encoder fault.
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.
Servomotor shaft was rotated by
external force.
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