15TROUBLESHOOTING

15.2 List of errors

MELSEC-Q

The following table shows the error details and remedies to be taken when an error occurs.

Classification

Error

Error name

Error

Operation status at error occurrence

 

of errors

code

 

 

 

 

 

 

 

 

 

 

 

000

(Normal status)

 

 

 

 

 

 

 

Fatal errors

001

Faults

Hardware is faulty.

The system stops.

 

002

Internal circuit fault

 

 

 

 

 

 

 

 

 

The system stops with the setting

 

 

 

 

(deceleration stop/sudden stop) of the

 

101

PLC READY OFF

A PLC READY signal (Y0) is turned

detailed parameter 2 Sudden stop

 

during operation

OFF during operation.

selection (stop group 2).

 

 

 

 

(Note that the deceleration stop only

 

 

 

 

occurs during the manual pulse

 

 

 

 

generator operation.)

 

102

Drive unit READY

The drive unit READY signal is

The system stops immediately.

 

OFF

turned OFF during operation.

 

 

 

 

 

 

 

 

 

 

The system stops with the setting

 

 

 

 

(deceleration stop/sudden stop) of the

 

 

Test mode faults

The personal computer cannot

detailed parameter 2 Sudden stop

 

103

selection (stop group 2).

 

 

during operation

communicate with the CPU unit.

(Note that the deceleration stop only

 

 

 

 

 

 

 

 

occurs during the manual pulse

 

 

 

 

generator operation.)

 

 

 

 

 

 

104

Hardware stroke

The hardware stroke limit (upper limit The system stops with the setting

Common

limit (+)

signal FLS) is turned OFF.

(deceleration stop/sudden stop) of the

 

detailed parameter 2 Sudden stop

 

 

 

 

 

 

 

selection (stop group 1).

 

 

 

 

 

 

Hardware stroke

The hardware stroke limit (lower limit

(Note that the deceleration stop only

 

105

occurs during the manual pulse

 

limit (–)

signal RLS) is turned OFF.

generator operation.)

 

 

 

 

106

Stop signal ON at

Start is requested when a stop signal

The system does not start positioning.

 

start

is turned ON.

 

 

 

READY OFF

ON

The PLC READY signal is turned

The QD75 READY signal (X0) is not

 

107

from OFF to ON when BUSY signal

 

 

during BUSY

 

is turned ON.

turned ON.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When the OPR retry invalid is set,

 

OPR

201

Start at OP

 

the near-point dog machine OPR is

The machine OPR is not started.

 

 

 

 

started with the OPR complete flag

 

 

 

 

 

turned ON.

 

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Mitsubishi Electronics QD75P, QD75D user manual List of errors