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MELSEC-Q
8 TROUBLESHOOTING
8.3.3 Error codes detected on remote I/O stations and equivalent to CPU module error
codes
The remote I/O station performs some of the same processes as the CPU module.
Accordingly, the remote I/O station detects the same error codes
1 2
as in the CPU
module.
When an error occurs, the error code, error message or any other information can be
read by GX Developer.
For details about operating GX Developer, refer to the GX Developer Operating
Manual.
1 : CPU module error codes are classified into minor, moderate, and major errors as
listed below.
• Minor error: Errors that may allow the CPU module to continue the
operation, e.g., battery error.
(Error code: 1300 to 10000)
• Moderate error: Errors that may cause the CPU module to stop the operation,
e.g., watchdog timer error.
(Error code: 1300 to 10000)
• Major error: Errors that may cause the CPU module to stop the operation,
e.g., RAM error.
(Error code: 1000 to 1299)
Determine the error level, i.e. whether the operation can be continued or stopped,
by referring to "Operating Statuses of CPU" described in (1) "Error Code List" in
this section.
2 : If any error code not listed in this section is detected, please consult your local
Mitsubishi representative.