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TROUBLESHOOTING
12.5 Error codes returned to request source during communication with CPU module
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12.5 Error codes returned to request source during communication
with CPU module
The CPU module returns an error code to GX Developer if an error occurs at a request of
communication from GX Developer.
POINT
This error code is not an error that is detected by the CPU module self-diagnosis
function, so it is not stored in the special relay (SD0).
When the request origin is a GX Developer, a message or an error code is
displayed.
The error contents of the error codes (4000H to 4FFFH) detected by the CPU module and
the messages displayed by the GX Developer are shown in Table12.10.
Table12.10 Error code
Error code
(Hexadecimal)
Error item Error details Corrective action
4000
H
Common error
Serial communication sum check error
• Connect the serial communication cable correctly.
• Take noise reduction measures.
4001
H
Unsupported request was executed.
Check the CPU module model name selected in the
peripheral device.
4002
H
Unsupported request was executed.
Check the CPU module model name selected in the
peripheral device.
4003
H
Command for which a global request cannot
be performed was executed.
Perform the request again with a peripheral device.
4004
H
Any operation for the CPU module is
prohibited by the system protect function
provided against the following events.
• The system protect switch is ON.
• The CPU module is starting.
• Set the system protect switch of the CPU module to
OFF.
• Perform operation again after the CPU module has
completed starting.
4005
H
The volume of data handled according to the
specified request is too large.
Perform the request again with a peripheral device.
4006
H
Serial communication could not be initialized.
Check the CPU module model name selected in the
peripheral device.
4010
H
CPU mode
error
The CPU module is running to the request
contents cannot be executed.
Execute after setting the CPU module to STOP status.
4013
H
Since the CPU module is not in a STOP
status, the request contents cannot be
executed.
Execute after setting the CPU module to STOP status.