8 TROUBLESHOOTING
MELSEC-Q
8 - 60 8 - 60
*1
: Characters in parentheses ( ) indicate the special register numbers where individual information is being
stored.
*18
: Serial No.(with the first 5 digits : 07032 or later) is applicable.
Error
Code
(SD0)
*1
Error Contents and Cause Corrective Action
Corresponding
CPU
1500
• A momentary power supply
interruption has occurred.
• The power supply went off.
Check the power supply.
Rem
1510
The power supply voltage (100 to
240VAC) of either of the two power
supply modules on the power supply
duplexing extension base unit dropped
to or below 85% of the rated voltage.
Check the supply voltage of the power
supply module. If the voltage is
abnormal then replace the power
supply module.
Q4AR
The voltage of one power supply
module dropped on the redundant
base unit.
Check the power supplied to the
redundant power supply modules
mounted on the redundant base unit.
Qn(H)
*18
QnPH
*18
QnPRH
Rem
1520
The voltage(100 to 240VAC) of the
power supply module on the extension
base unit dropped to or below 85% of
the rated voltage.
Check the supply voltage of the power
supply module. If the voltage is
abnormal then replace the power
supply module.
Q4AR
A fault of one redundant power supply
module was detected in the redundant
power supply system.
Hardware fault of the redundant power
supply module. (Contact your local
Mitsubishi representative, explaining a
detailed description of the problem.)
Qn(H)
*18
QnPH
*18
QnPRH
Rem
1530
The 24 VDC power supplied to the
system management module AS92R
has dropped below 90% of the rated
voltage.
Check the 24VDC power supplied to
the system management module
AS92R.
Q4AR
1600
• The battery voltage in the CPU
module has dropped below
stipulated level.
• The lead connector of the CPU
module battery is not connected.
• Change the battery.
• If the battery is for program memory,
standard RAM or for the back-up
power function, install a lead
connector.
1601
Voltage of the battery on memory card
1 has dropped below stipulated level.
Change the battery.
QnA
Qn(H)
QnPH
QnPRH
1602
Voltage of the battery on memory card
2 has dropped below stipulated level.
Change the battery. QnA
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