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MELSEC-Q
11 TROUBLESHOOTING
Special Relay List
(11) For redundant system (Other system CPU information
1) for Q4AR only
SM1600 to SM1650 only valid for the CPU redundant system backup mode, so they cannot
be refreshed during the separate mode. Either the backup mode or the separate mode is
valid for the SM4651 to SM1699. SM1600 to SM1699 are all turned off for standalone
system.
Number
Name
Meaning
Explanation
Set by
(When Set)
ACPU
M9
2
Applicable
CPU
SM1600 Diagnosis error
OFF : No error
ON : Error
• Turns on if a error occurs in the diagnosis results.
(Including external diagnosis)
• Remains on even if returns to normal thereafter.
S
(Each END)
New
SM1601 Self diagnosis error
OFF : No self
diagnosis error
ON : Self diagnosis
error
• Turns on when an error occurs in the self-diagnosis
results.
• Remains on even if returns to normal thereafter.
S
(Each END)
New
SM1605
Error common
information
OFF : No error
common
information
ON : Error common
information
• Turns on when there is error common information and the
SM1600 is on.
S
(Each END)
New
SM1616
Error individual
information
OFF : No error
individual
information
ON : Error individual
information
• Turns on when there is error individual information and the
SM1600 is on.
S
(Each END)
New
SM1653 STOP contact STOP status • Turns on when in the STOP status.
S
(Each END)
New
SM1654 PAUSE contact PAUSE status • Turns on when in the PAUSE status.
S
(Each END)
New
SM1655 STEP-RUN contact STEP-RUN status • Turns on when in the STEP-RUN status.
S
(Each END)
New
Q4AR
1 Stores other system CPU diagnostic information and system information.
2 This shows the special relay(SM ) for the host system CPU.