Mitsubishi Electric L02SCPU User's Manual And Reference page 165

(6) Self-diagnostics list
Diagnostics
CPU error
END instruction not
executed
SFC program execution
error
RAM check
Operation circuit check
I/O interrupt error
LAN controller failure
Intelligent function module
*1
error
Hardware
failure
System bus error
End cover error
Momentary power failure
Flash ROM error
Module verification
Intelligent function module
assignment error
Intelligent module program
*1
execution error
Intelligent function module
version error
Handling
error
END cover is not attached
Unrecognizable module
connection error
No parameter
Boot error
: Self-diagnostics is performed. : Self-diagnostics is not performed.
Error message Diagnostic timing
CPU UNIT DOWN • Always
END NOT • Execution of the END
EXECUTE instruction
SFCP. END
• Execution of a SFC program
ERROR
RAM ERROR • Power-on/reset
• Power-on/reset
OPE.CIRCUIT
• Execution of the END
ERR.
instruction
I/O INT. ERROR • Occurrence of an interrupt
LAN CTRL. DOWN • Power-on/reset
• Power-on/reset
• Execution of the FROM/TO
instructions
• Execution of the intelligent
SP.UNIT DOWN
function module dedicated
instruction
• Execution of the END
instruction
• Powered-on
• Execution of END
• BUS TIMEOUT processing
ERR. • Execution of the FROM/TO
• UNIT BUS ERR. instructions
• SYSTEM RST • Execution of the intelligent
ERR. function module dedicated
instruction
• Always
• Powered-on
• Execution of END
END COVER ERR.
processing
• Always
AC/DC DOWN • Always
FLASH ROM
• Writing to ROM
ERROR
UNIT BAD • Execution of the END
CONNECT instruction
• Power-on/reset
SP.UNIT LAY ERR. • Switching from STOP to
RUN
• Execution of the FROM/TO
SP.UNIT ERROR
instructions
SP.UNIT VER.ERR • Power-on/reset
• Power-on/reset
NO END COVER • Execution of the END
instruction
SYSTEM LAY ERR • Power-on/reset
• Power-on/reset
MISSING PARA. • Switching from STOP to
RUN
BOOT ERROR • Power-on/reset
CHAPTER 3 CPU MODULE FUNCTIONS
CPU LED status
module
RUN ERR.
status
Stop Off Flashing
Stop Off Flashing
Stop Off Flashing
Stop Off Flashing
Stop Off Flashing
Stop Off Flashing
Stop Off Flashing
Flashing
Stop/Continue Off/On
/On
Stop Off Flashing
Stop Off Flashing
Continue On Off
Continue On On
Flashing
Stop Off/On
/On
Stop Off Flashing
Flashing
Stop/Continue Off/On
/On
Stop Off Flashing
Stop Off Flashing
Stop Off Flashing
Stop Off Flashing
Stop Off Flashing
Availability
of self-
diagnostics
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3
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*3
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