8 TROUBLESHOOTING
MELSEC-Q
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(1) Error code list
The following information deals with error codes and the meanings, causes, and
corrective measures of error messages.
<Relevant CPU>
: Indicates all the QnACPUs and QCPU.
QCPU : Indicates all the Q series CPU modules.
Q00J/Q00/Q01 : Indicates the Basic model QCPU.
Qn(H) : Indicates the High Performance model QCPU.
QnPH : Indicates the Process CPU.
QnPRH : Indicates the Redundant CPU.
QnA : Indicates the QnA series and Q2ASCPU series.
Rem : Indicates the MELSECNET/H remote I/O modules.
Each CPU module model name: Indicates the relevant specific CPU module.
(Example: Q4AR, Q2AS)
*1
: Characters in parentheses ( ) indicate the special register numbers where individual information is being
stored.
Error
Code
(SD0)
*1
Error
Messages
Common
Information
(SD5 to 15)
Individual
Information
(SD16 to 26)
LED Status Operating
Statuses
of CPU
Diagnostic
Timing
RUN ERROR
1000
MAIN CPU
DOWN
---- ---- Off Flicker Stop Always
1001
1002
1003
1004
1005
1006
1007
1008
1009