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App-121
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Appendix 3 SPECIAL RELAY LIST
(1) Diagnostic Information
TableApp.3.2 Special relay
Number Name Meaning Explanation
Set by
(When Set)
Corres-
ponding
ACPU
M9
Corresponding
CPU
SM0 Diagnostic errors
OFF : No error
ON : Error
• Turns ON if an error occurs as a result of diagnosis.
(Includes when an annunciator is ON, and when an
error is detected with CHK instruction)
• Remains ON even if the condition is restored to
normal thereafter.
S (Error) New
Qn(H)
QnPH
QnPRH
• Turns ON if an error occurs as a result of diagnosis.
(Includes when an annunciator is ON)
• Remains ON even if the condition is restored to
normal thereafter.
S (Error) New
Q00J/Q00/Q01
QnU
SM1 Self-diagnostic error
OFF : No self-diagnosis
errors
ON : Self-diagnosis
• Turns ON if an error occurs as a result of diagnosis.
(Does not include when an annunciator is ON or
when an error is detected by the CHK instruction)
• Remains ON even if the condition is restored to
normal thereafter.
S (Error) M9008
Qn(H)
QnPH
QnPRH
• Turns ON if an error occurs as a result of diagnosis.
(Does not include when an annunciator is ON)
• Remains ON even if the condition is restored to
normal thereafter.
S (Error) New
Q00J/Q00/Q01
QnU
SM5
Error common
information
OFF : No error common
information
ON : Error common
information
• When SM0 is ON, turns ON if there is error common
information
S (Error) New
QCPU
SM16
Error individual
information
OFF : No error individual
information
ON : Error individual
information
• When SM0 is ON, turns ON if there is error individual
information
S (Error) New
SM50 Error reset
OFF ON: Error reset
• Conducts error reset operation U New
SM51 Battery low latch
OFF : Normal
ON : Battery low
• Turns ON if battery voltage at CPU module or
memory card drops below rated value.
• Remains ON even if the battery voltage returns to
normal thereafter.
• Synchronizes with the BAT. LED.
S (Error) M9007
Qn(H)
QnPH
QnPRH
QnU
• Turns ON if battery voltage at CPU module drops
below rated value.
• Remains ON even if the battery voltage returns to
normal thereafter.
• Synchronous with ERR. LED
S (Error) New Q00J/Q00/Q01
SM52 Battery low
OFF : Normal
ON : Battery low
• Same as SM51, but turns OFF subsequently when
battery voltage returns to normal.
S (Error) M9006
QCPU
SM53
AC/DC DOWN
detection
OFF : AC/DC DOWN not
detected
ON : AC/DC DOWN
detected
• Turns ON if an instantaneous power failure of within
20ms occurs during use of the AC power supply
module.
Reset when the power supply is switched OFF, then
ON.
S (Error) M9005
• Turns ON if an instantaneous power failure of within
10ms occurs during use of the DC power supply
module.
Reset when the power supply is switched OFF, then
ON.