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MELSEC-Q
15 TROUBLESHOOTING
15.2 List of errors
The following table shows the error details and remedies to be taken when an error
occurs.
Classification
of errors
Error
code
Error name Error Operation status at error occurrence
— 000 (Normal status) — —
001 Faults
Fatal errors
002 Internal circuit fault
Hardware is faulty. The system stops.
101
PLC READY OFF
during operation
A PLC READY signal (Y0) 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 2).
(Note that the deceleration stop only
occurs during the manual pulse
generator operation.)
102
Drive unit READY
OFF
The drive unit READY signal is
turned OFF during operation.
The system stops immediately.
103
Test mode faults
during operation
The personal computer cannot
communicate with the CPU unit.
The system stops with the setting
(deceleration stop/sudden stop) of the
detailed parameter 2 Sudden stop
selection (stop group 2).
(Note that the deceleration stop only
occurs during the manual pulse
generator operation.)
104
Hardware stroke
limit (+)
The hardware stroke limit (upper limit
signal FLS) is turned OFF.
105
Hardware stroke
limit (–)
The hardware stroke limit (lower limit
signal RLS) is turned OFF.
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.)
106
Stop signal ON at
start
Start is requested when a stop signal
is turned ON.
The system does not start positioning.
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.
OPR 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.