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MELSEC-Q
15 TROUBLESHOOTING
Classification
of errors
Error
code
Error name Error Operation status at error occurrence
1201 OPR data incorrect
The backup data for absolute position
restoration is illegal.
1203 Encoder error 1
The change amount of the encoder
current value during operation is
shown below.
"Change amount of the encoder
current value/ 3.5 [ms] > Motor 180° "
Check any time (both servo ON/OFF)
after the servo amplifier is turned ON.
Encoder
errors
1204 Encoder error 2
The following equation is established
during operation.
“Encoder current value (encoder raw
data) [PLS]
Feedback current value
(data inside servo amplifier) [PLS]
(number of encoder significant bits)”
Check any time (both servo ON/OFF)
after the servo amplifier is turned ON.
Continue the operation.
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