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(7)
Self-diagnostics list
The following table shows the self-diagnostics performed by the CPU module.
To check the error messages in the "Error message" column of Table6.29, select [Diagnostics]
diagnostics] of GX Developer.
Diagnostics
error
CPU
END instruction
not executed
SFC program
execution error
check
RAM
Operation circuit
check
*1 *2
Fuse blown
interrupt error
I/O
controller
LAN
failure
Hardware
Intelligent function
failure
1
module error *
Control bus error
Momentary power
failure
Multiple CPU high
speed bus error
6 - 100
Table6.29 Self-diagnostics list
Error message
Diagnostic timing
MAIN CPU
• Always
DOWN
• Execution of the
END NOT
END instruction
EXECUTE
• Execution of a
SFCP. END
SFC program
ERROR
• Power-on/reset
RAM ERROR
• Power-on/reset
OPE.CIRCUIT
• Execution of the
ERR.
END instruction
FUSE BREAK
• Always
OFF
• Occurrence of an
I/O INT.
interrupt
ERROR
LAN CTRL.
• Power-on/reset
DOWN
• Power-on/reset
• Execution of the
FROM/TO
instructions
• Execution of the
SP.UNIT
intelligent
DOWN
function module
dedicated
instruction
• Execution of the
END instruction
• Power-on
• Execution of
END processing
• Execution of the
FROM/TO
instructions
CONTROL-
BUS ERR.
• Execution of the
intelligent
function module
dedicated
instruction
• Always
• Always
AC/DC DOWN
MULTI-C.BUS
• Power-on/reset
ERR.
LED status
CPU
Q00UJ
module
CPU
RUN
ERR.
status
Flashi
Stop
Off
ng
Flashi
Stop
Off
ng
Flashi
Stop
Off
ng
Flashi
Stop
Off
ng
Flashi
Stop
Off
ng
Flashi
Stop/
Off/on
continue
ng/on
Flashi
Stop
Off
ng
Flashi
Stop
Off
ng
Flashi
Stop
/
Off
/on
ng
continue
/on
Flashi
Stop
Off
ng
Off
Continue
On
Flashi
Stop
Off
ng
:
Self-diagnostics is performed.
[PLC
Q00U
Built-in
CPU,
Q02U
QnUD(H)
Ethernet
Q01U
CPU
CPU
port QCPU
CPU
:
Self-diagnostics is not performed.
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