Mitsubishi Electric Q26UD(E)HCPU - Page 493

491
APPENDICES
A
Appendix 2 List of Special Relay Areas
(16)Redundant system (other system CPU information
*1
)
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.
*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
Number Name Meaning Explanation
Set by
(When Set)
Corresponding
Host
SM
*2
Corresponding
CPU
SM1600
Other system
error flag
OFF: No error
ON: Error
• 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.
S (Every
END
processing)
 QnPRH
SM1610
Other system
diagnostics error
OFF: No error
ON: Error
• 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.
S (Every
END
processing)
SM0 QnPRH
SM1611
Other systems
self diagnostics
error.
OFF: No error
ON: Error
• 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.
S (Every
END
processing)
SM1 QnPRH
SM1615
Other system
common error
information
OFF: No common error
information
present
ON: Common error
information
present
• This relay turns on when there is error
common information data for an error
occurred in the CPU module in the other
system.
• The SM5 status for the CPU module in the
other system is reflected.
S (Every
END
processing)
SM5 QnPRH
SM1626
Error individual
information for
other systems
OFF: No individual
error information
present
ON: Individual error
information
present
• This relay turns on when there is error
individual information for an error occurred
in the CPU module in the other system.
• The SM16 status for the CPU module in
the other system is reflected.
S (Every
END
processing)
SM16 QnPRH
SM1649
Standby system
cancel error flag
OFF  ON:Cancels
error of standby
system
This relay is turned on from off to clear a
continuation error occurred in the standby
system. Use SD1649 to specify the error
code of the error to be canceled.
U  QnPRH