12
- 20
12.3 Error Code List
12
TROUBLESHOOTING
12.3 Error Code List
The QS series CPU module uses the self diagnostics function to display error information
(LED indication) and stores the information into the special relay SM and special register
SD, when an error occurs in the following situations:
• When the PLC is powered ON.
• When the CPU module is reset.
• When the CPU module is switched from STOP to RUN.
• While the CPU module is running.
If an error occurs when a communication request is issued from GX Developer, intelligent
function module or network system to the CPU module, the CPU module returns the error
code (4000
H
to 4FFF
H
) to the request source.
The following describes the description of errors which occur in the CPU module and the
corrective actions for the errors.
(1) How to read the error code list
The following describes how to read Section 12.3.3 Error code list (1000 to 1999) to
Section 12.3.8 Error code list (8000 to 9000).
(a) Error code, common information and individual information
Alphanumeric characters in the parentheses of the titles indicate the special
register numbers where each information is stored.
(b) Compatible CPU
QS: Compatible with the QSCPU.