Mitsubishi Electric MELSEC Q Series Reference Manual page 325

8 TROUBLESHOOTING
Error
code Error contents and cause
(SD0)
[MAIN CPU DOWN]
Runaway or failure of the remote I/O module
• Malfunction due to noise or other causes
• Hardware failure
1000 Collateral information
• Common Information (SD5 to SD15): -
• Individual Information (SD16 to SD26): -
Diagnostic Timing
• Always
[MAIN CPU DOWN]
Runaway or failure of the remote I/O module
• Malfunction due to noise or other causes
• Hardware failure
1005 Collateral information
• Common Information (SD5 to SD15): -
• Individual Information (SD16 to SD26): -
Diagnostic Timing
• Always
[MAIN CPU DOWN]
• The voltage waveform that is outside the specification
is applied to the power supply module, and an error
is detected.
• A failure was detected on the power supply module,
remote I/O module, main base unit, or extension
cable.
1009 • When using the redundant base unit, the redundant
power supply module failure in both systems is
detected.
Collateral information
• Common Information (SD5 to SD15): -
• Individual Information (SD16 to SD26): -
Diagnostic Timing
• Always
[RAM ERROR]
The work area RAM in the remote I/O module is faulty.
Collateral information
1109 • Common Information (SD5 to SD15): -
• Individual Information (SD16 to SD26): -
Diagnostic Timing
• Always
[FUSE BREAK OFF]
There is an output module with a blown fuse.
Collateral information
• Common Information (SD5 to SD15): Network
1300
No./Station No.
• Individual Information (SD16 to SD26): -
Diagnostic Timing
• Always
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(1) Error code list
The following table lists the error codes, error messages, error causes, and
corrective actions.
Corrective action
• Take noise reduction measures.
• Reset the remote I/O module.
If the same error code is displayed again,
the cause is a hardware failure of the
remote I/O module. (Please consult your
local Mitsubishi representative.)
• Take noise reduction measures.
• Reset the remote I/O module.
If the same error code is displayed again,
the cause is a hardware failure of the
remote I/O module. (Please consult your
local Mitsubishi representative.)
• Correct the voltage waveform applied to the
power supply module.
• Reset the remote I/O module.
If the same error code is displayed again,
the cause is a hardware failure of the
remote I/O module. (Please consult your
local Mitsubishi representative.)
The cause is a hardware failure of the
remote I/O module. (Please consult your
local Mitsubishi representative.)
Check the FUSE. LED of the output modules
and replace the module whose LED is on. (A
blown fuse can be identified using GX
Works2 or GX Developer. Check the special
register, SD1300 to SD1331, to see if the bit
corresponding to the module with a blown
fuse is set to "1".)
MELSEC-Q
LED status,
Remote I/O
operation status
REM: Off
ERR: On
Remote I/O status:
Stop
REM: Off
ERR: On
Remote I/O status:
Stop
REM: Off
ERR: On
Remote I/O status:
Stop
REM: Off
ERR: On
Remote I/O status:
Stop
REM: Off
ERR: On
Remote I/O status:
Stop/Continue *1
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