15 - 12
MELSEC-Q
15 TROUBLESHOOTING
Classification
of errors
Error
code
Error name Error Operation status at error occurrence
The hardware stroke limit (lower limit
signal RLS) is turned OFF during
operation.
The system stops with the setting
(deceleration stop/sudden stop) of the
detailed parameter 2 Sudden stop
selection (stop group 1).
(Note that the deceleration stop only
occurs during the manual pulse
generator operation.)
105
Hardware stroke
limit (–)
The start of an operation is
requested when the lower limit signal
(RLS) is OFF.
The system does not start.
106
Stop signal ON at
start
Start is requested when a stop signal
is turned ON.
The system does not start.
Common
107
READY OFF
ON
during BUSY
The PLC READY signal is turned
from OFF to ON when BUSY signal
is turned ON.
The QD75 READY signal (X0) is not
turned ON.
201 Start at OP
When the OPR retry invalid is set,
the near-point dog machine OPR is
started with the OPR complete flag
turned ON.
The machine OPR is not started.
203
Dog detection timing
fault
The near-point dog signal is turned
OFF during the deceleration from an
OPR speed to a creep speed by the
near-point dog machine OPR.
204
OP detection timing
fault
The zero signal is turned OFF during
the deceleration from an OPR speed
to a creep speed by the stopper
method 2)-OPR.
205 Dwell time fault
A dwell time is passed during the
deceleration from a creep speed to a
OPR speed by the stopper method
1)-OPR.
The system stops with the setting
(deceleration stop/sudden stop) of the
detailed parameter 2 Sudden stop
selection (stop group 3).
(Note that the deceleration stop only
occurs during the manual pulse
generator operation.)
OPR
206
Count method
movement amount
fault
In the count method 1 and 2
machine OPR, a parameter "Setting
of movement amount after near-
point dog ON" is smaller than a
distance necessary for deceleration
stop from an OPR speed.
The machine OPR is not started.
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