Mitsubishi Electric Q26UD(E)HCPU User Manual page 493

(16)Redundant system (other system CPU information
The special relay (SM1600 to SM1649) is valid when the redundant system is in backup mode and is invalid in
separate mode. All bits are set to off for stand-alone systems.
Number Name
Other system OFF: No error
SM1600
error flag ON: Error
Other system OFF: No error
SM1610
diagnostics error ON: Error
Other systems
OFF: No error
SM1611 self diagnostics
ON: Error
error.
OFF: No common error
Other system
SM1615 common error
ON: Common error
information
OFF: No individual
Error individual
SM1626 information for
ON: Individual error
other systems
OFF  ON:Cancels
Standby system
SM1649
cancel error flag
*1 Diagnostic information of the CPU module in the other system is stored.
*2 Special relay areas (SM) for the CPU module in the host system
Meaning
• This relay turns on if an error is detected
by error check for redundant system. (This
relay turns on when any of the SD1600 bits
turns on.)
• This relay turns off when an error is
cleared.
• This relay turns on if a diagnostic error
occurs in the CPU module in the other
system. (Also turns off when an
annunciator turns on and when an error is
detected by the CHK instruction.)
• The SM0 status for the CPU module in the
other system is reflected.
• This relay turns on if a self-diagnostics
error occurred in the CPU module in the
other system. (Excluding error detection by
an annunciator and the CHK instruction.)
• The SM1 status for the CPU module in the
other system is reflected.
• This relay turns on when there is error
information common information data for an error
present occurred in the CPU module in the other
system.
information • The SM5 status for the CPU module in the
present other system is reflected.
• This relay turns on when there is error
error information
individual information for an error occurred
present
in the CPU module in the other system.
• The SM16 status for the CPU module in
information
the other system is reflected.
present
This relay is turned on from off to clear a
continuation error occurred in the standby
error of standby
system. Use SD1649 to specify the error
system
code of the error to be canceled.
*1
)
Set by
Explanation
(When Set)
S (Every
END
processing)
S (Every
END
processing)
S (Every
END
processing)
S (Every
END
processing)
S (Every
END
processing)
APPENDICES
Corresponding
Corresponding
Host
CPU
*2
SM

QnPRH
SM0 QnPRH
SM1 QnPRH
SM5 QnPRH
SM16 QnPRH

U QnPRH
A
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