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MELSEC-Q
15 TROUBLESHOOTING
Classification
of errors
Error
code
Error name Error Operation status at error occurrence
983
Home position return
(OPR) speed error
• The set range of the home position
return (OPR) basic parameter
"Home position return (OPR)
speed" is outside the setting range.
• The set range of the home position
return (OPR) basic parameter "
Home position return (OPR) speed"
is smaller than the bias speed at
start.
984 Creep speed error
• The set range of the home position
return (OPR) basic parameter
"Creep speed" is outside the
setting range.
• The set range of the home position
return (OPR) basic parameter
"Creep speed" is larger than the
home position return (OPR) speed.
• The set range of the home position
return (OPR) basic parameter
"Creep speed" is smaller than the
bias speed at start.
985
Home position return
(OPR) retry error
The set range of the home position
return (OPR) basic parameter "
Home position return (OPR) retry" is
outside the setting range.
990
Home position return
(OPR) error
The set range of the home position
return (OPR) detailed parameter "
Home position return (OPR)" is
outside the setting range.
991
Setting for the
movement amount
after near-point dog
ON error
The set range of the home position
return (OPR) detailed parameter
"Setting for the movement amount
after near-point dog ON" is outside
the setting range.
992
Home position return
(OPR) acceleration
time selection error
The set range of the home position
return (OPR) detailed parameter
"Home position return (OPR)
acceleration time selection" is
outside the setting range.
Parameter
setting range
errors
993
Home position return
(OPR) deceleration
time selection error
The set range of the home position
return (OPR) detailed parameter "
Home position return (OPR)
deceleration time selection" is
outside the setting range.
The QD75 READY signal (X0) is not
turned ON.