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MELSEC-Q
15 TROUBLESHOOTING
Classifica
tion of
errors
Error
code
LED
indicator
of servo
amplifier
Error name Description Cause
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.125
Model loop gain" too small.
Servomotor shaft was rotated by
external force.
Collision with the machine.
The motor encoder fault.
Servomotor miswiring servo
amplifier terminals U, V, W phase
don’t mach motor terminals U, V, W
phase.
2052 52 Error excessive
The deviation between the model
position and the actual servomotor
position exceeds "
Pr.164
"setting
value (initial value: 3 revolutions).
SSCNET
cable fault.
2060 1A
Motor
combination
error
Wrong combination of the servo
amplifier and servomotor.
Wrong combination of the servo
amplifier and servomotor
connected.
Servo
amplifier
errors
2088 888 Watchdog CPU, parts faulty Fault of parts in servo amplifier.