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9.1
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
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 9.1.3 Error code list (1000 to 1999) to Section
9.1.8 Error code list (8000 to 9000).
(a) Error code, common information and individual information
(b) Compatible CPU
9-2
9.1 Error Code List
to 4FFF
) to the request source.
H
Alphanumeric characters in the parentheses of the titles indicate the special register
numbers where each information is stored.
QS: Compatible with the QSCPU.
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