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MELSEC-A
14 TROUBLESHOOTING
Error
code
Servo
amplifier
LED display
Name Definition Occurrence factor
1. Acceleration/deceleration time constant is small.
2. Torque limit value is small.
3. Motor cannot be started due to torque shortage caused by power
supply voltage drop.
4. " Pr.113 Position loop gain 1" value is small.
5. Servomotor shaft was rotated by external force.
6. Machine struck something.
7. Encoder faulty.
2052 52 Error excessive
Droop pulse value of the
deviation counter
exceeded the
" Pr.131 Error excessive
alarm level" value (initial
value: 2 revolutions).
8. Wrong connection of servomotor.
Servo amplifier's output terminals U, V, W do not match
servomotor's input terminals U, V, W.
1. Communication cable faulty (open cable or short circuit).
2086 8E RS-232 alarm
Serial communication
error occurred between
servo amplifier and
telecommunication
equipment (personal
computer or similar
device).
2. Telecommunication equipment (personal computer or similar
device) faulty.
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