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9.1.1
Error codes
Errors are detected by the self diagnostic function of the CPU module or detected during
communication with the CPU module.
The relation between the error detection pattern, error detection location and error code is shown
in Table9.1.
Error detection pattern
Detection by the self
diagnostics function of
CPU module
Detection at
communication with CPU
module
*1: CPU module error codes are classified into minor, moderate, major errors as shown below.
• Minor error:Errors that may allow the CPU module to continue the operation, e.g., battery error. (Error
code: 1300 to 9000)
• Moderate error:Errors that may cause the CPU module to stop the operation, e.g., WDT error.
(Error code: 1300 to 9000)
• Major error:Errors that may cause the CPU module to stop the operation, e.g., RAM error.
(Error code: 1000 to 1299)
"Errors that may allow the CPU module to continue the operation" and "Errors that may cause the CPU
module to stop the operation" can be distinguished using "Operating Statuses of CPU" of Section 9.1.3 to
9.1.8 Error code list.
9.1.2
Reading an error code
If an error occurs, the error code, error message and others to perform the troubleshooting can
be read with GX Developer.
1) Start GX Developer.
2) Connect the CPU module to the personal computer that started GX Developer.
3) On GX Developer, choose the [Online]
4) Choose the [Diagnostic]
5) Click the "Current error" button in the PLC diagnostic dialog box to display the
6) Choose the [Help]
Refer to the following manual for details of the GX Developer operating method.
GX Developer Operating Manual
Table9.1 Reference destination
Error detection
location
CPU module
CPU module
CC-Link Safety
master module
Ethernet module
CC-Link IE controller
network module
MELSECNET/H
module
project from the CPU module.
error code and error message.
[CPU error] menu and check details of the corresponding
error code.
Error code
*1
Section 9.1.3 to 9.1.8
1000 to 9000
QSCPU User's Manual (Hardware
4000
to 4FFF
H
H
Design, Maintenance and Inspection)
CC-Link Safety System Master
B000
to BFFF
H
H
Module User's Manual
Ethernet Interface Module User's
C000
to CFFF
H
H
Manual
CC-Link IE Controller Network
E000
to EFFF
H
H
Reference Manual
MELSECNET/H Network System
F000
to FFFF
H
H
Reference Manual
[Read from PLC] menu and read the
[PLC diagnostic] menu.
9.1 Error Code List
9.1.1 Error codes
9
Reference
9-3
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