Mitsubishi Electric QJ71LP21 Reference Manual page 301

8 TROUBLESHOOTING
Error Code
Error Contents and Cause
*1
(SD0)
9000 Annunciator (F) was set ON
9010 Error detected by the CHK instruction.
Storage of data onto ROM was completed normally in
9020 automatic write to standard ROM.
(BOOT LED also flickers.)
In the multiple CPU system, an error occurred in the CPU
10000 module other than the Process CPU/High Performance
model QCPU.
*1 : Characters in parentheses ( ) indicate the special register numbers where individual information is being stored.
*12 : This applies to the CPU of function version B or later.
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Corrective Action
Read the individual information of the error using the
peripheral device, and check the program corresponding
to the numerical value (annunciator number).
Read the individual information of the error using the
peripheral device, and check the program corresponding
to the numerical value (error number) there.
Use the DIP switches to set the valid parameter drive to
the standard ROM. Then, switch power on again, and
perform boot operation from the standard ROM.
Check the details of the generated error by connecting to
the corresponding CPU module using GX Developer.
MELSEC-Q
Corresponding CPU
QnA
Qn(H)
QnPH
QnPRH
*12
Qn(H)
QnPH
QnPRH
*12
Qn(H)
QnPH
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