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MELSEC-Q
15 TROUBLESHOOTING
Classification
of errors
Error
code
Error name Error Operation status at error occurrence
995
Home position return
(OPR) torque limit
value error
• The set range of the home position
return (OPR) detailed parameter "
Home position return (OPR) torque
limit value" is outside the setting
range.
• The home position return (OPR)
detailed parameter "Home position
return (OPR) torque limit value" has
exceeded the detailed parameter 1
"Torque limit setting value".
997
Speed designation
during home position
(OP) shift error
The set range of the home position
return (OPR) detailed parameter
"Speed designation during home
position (OP) shift" is outside the
setting range.
Parameter
setting range
errors
998
Operation setting for
incompletion of OPR
setting error
The set range of the home position
return (OPR) detailed parameter
"Operation setting for incompletion of
OPR setting" is outside the setting
range.
The QD75 READY signal (X0) is not
turned ON.
1201
Home position return
(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/ 1.7 [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.