65
6.3  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)
Error
Code
(SD0)
Error
Message
Common
Information
(SD5 to 15)
Individual
Information
(SD16 to 26)
LED Status CPU 
Operation
Status
Diagnostic
Timing
RUN ERROR
1000
MAIN CPU 
DOWN
– – Off Flicker Stop Always
1010
END NOT 
EXECUTE
– – Off Flicker Stop
When an END 
instruction 
executed
*1 CPU operation can be set in the parameters at error occurrence. (LED indication varies.)
*2 The BAT.ALM LED turns on at BATTERY ERROR.