Mitsubishi Q00JCPU User Manual page 344

6
FUNCTIONS
(7) Self-diagnostics list
Diagnostics
CPU error
END instruction not
executed
SFC program
execution error
RAM check
Tracking memory or
tracking hardware
Hardware
fault
failure
Calculation circuit
check
*1
Fuse blown
I/O interrupt error
6
6.17 Self-diagnostics Function
- 103
Table6.29 shows the details of self diagnostics performed by CPU module.
The error message in the "Error message" field given in Table6.29 can be checked by
choosing [Diagnostics]
The No. in the "CPU module" field corresponds to the CPU module as indicated
below.
Table6.28 No.in "CPU module" field and the corresponding CPU module
No.
1)
2)
3)
4)
Table6.29 Self-dianostics list
Error message Diagnostics timing
MAIN CPU
• Always
DOWN
• When the END
END NOT
instruction is
EXECUTE
executed
• When SFC
SFCP. END
program is
ERROR
executed
• When the CPU
RAM ERROR module is powered
on/reset
• When the CPU
module is powered
TRK. CIR.
on/reset
ERROR
• When operation is
being performed
• When the CPU
module is powered
OPE.CIRCUIT on/reset
ERR. • When END
processing is
executed
• When the END
instruction is
FUSE BRAKE
executed (Default...
OFF
checked)*
• When an interrupt
I/O INT. ERROR
occurs
* 1 : Can be changed to "Continue" in the parameter setting of GX Developer.
* 2 : Can be changed to "not checked" in the parameter setting of GX Developer. Not checked when
SM251 is ON.
[PLC diagnostics] on GX Developer.
Basic model QCPU
High Performance model QCPU
Process CPU
Redundant CPU
CPU
module
status
STOP
STOP
STOP
STOP
STOP
STOP
STOP/
Continue
2
STOP
: Self-diagnostics is performed
CPU module
LED status CPU module
RUN ERR. 1)
OFF Flicker
OFF Flicker
OFF Flicker
OFF Flicker
OFF Flicker
OFF Flicker
OFF/ON Flicker/ON
OFF Flicker
: Self-diagnostics is not performed
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2) 3) 4)