Mitsubishi Electric QS001CPU User Manual page 185

12
TROUBLESHOOTING
(1) Diagnostic Information
Number Name
Diagnostic
SM0
errors
Self-diagnosis
SM1
error
Error common
SM5
information
Error individual
SM16
information
SM50
Error reset
Battery low
SM51
latch
SM52
Battery low
AC DOWN
SM53
detection
SM56 Operation error
I/O module
SM61
verify error
Annunciator
SM62
detection
Table12.12 Descriptions of the special relay headings
Meaning
• Turns ON when an error is detected by
diagnostics
OFF : No error
(Includes when an annunciator is ON)
ON : Error
• Remains ON if the condition is restored to
normal thereafter.
• Turns ON when an error is detected by self-
diagnostics
OFF : No self-diagnosis
(Does not include when an annunciator is
errors
ON)
ON : Self-diagnosis
• Remains ON if the condition is restored to
normal thereafter.
OFF : No error common
information • When SM0 is ON, ON if there is error
ON : Error common common information
information
OFF : No error individual
information • When SM0 is ON, ON if there is error
ON : Error individual individual information
information
OFF ON: Error reset • Conducts error reset operation
• ON if battery voltage at CPU module or
memory card drops below rated value.
OFF : Normal
• Remains ON if the battery voltage returns to
ON : Battery low
normal thereafter.
• Synchronous with BAT. LED
OFF : Normal • Same as SM51, but goes OFF subsequently
ON : Battery low when battery voltage returns to normal.
• Turns ON if an instantaneous power failure of
OFF : AC DOWN not
within 20ms occurs during use of the AC
detected
power supply module.
ON : AC DOWN
Reset when the power supply is switched
detected
OFF, then ON.
• ON when operation error is generated
OFF : Normal
• Remains ON if the condition is restored to
ON : Operation error
normal thereafter.
• Turns ON if the I/O module differs from the
OFF : Normal status registered at power on.
ON : Error • Remains ON if the condition is restored to
normal thereafter.
OFF : Not detected
• Goes ON if even one annunciator F goes ON.
ON : Detected
Explanation
(When Set)
S (Instruction
execution)
12.6 Special Relay List
Set by Corresponding
CPU
S (Error)
S (Error)
S (Error)
S (Error)
U
QS
S (Error)
S (Error)
S (Error)
S (Error)
S (Error)
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