Mitsubishi MELSEC L Series User Manual page 279

(13) 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
OFF : No self
Other systems
SM1611 self diagnostics
error. ON : Self diagnostics
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 to ON:
Standby system
SM1649
cancel error flag
*1 Stores other system CPU diagnostic information and system information.
*2 This shows the special relay (SM
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.
diagnostics error
(Excluding error detections by an annunciator
occurred
and the CHK instruction.)
• The SM1 status for the CPU module in the other
error occurred
system is reflected.
• This relay turns on when there is error common
information
information data for an error occurred in the
present
CPU module in the other system.
• The SM5 status for the CPU module in the other
information
system is reflected.
present
• This relay turns on when there is error individual
error information
information for an error occurred in the CPU
present
module in the other system.
• The SM16 status for the CPU module in the
information
other system is reflected.
present
This relay is turned on from off to clear a
continuation error occurred in the standby system.
Cancels error of
Use SD1649 to specify the error code of the error
standby system
to be canceled.
) for the host system CPU.
*1
)
Explanation
S (Every END
APPENDICES
Corre-
Corre-
sponding
Set by
sponding
Host
(When Set)
CPU
*2
SM
-
SM0
SM1
processing)
QnPRH
SM5
SM16
U -
277
A