Mitsubishi Electric Q13UDVCPU - Page 505

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APPENDICES
A
Appendix 2 List of Special Relay Areas
(22)CPU module data backup/restoration function
*1 Modules whose serial number (first five digits) is "17103" or later
*2 Modules whose serial number (first five digits) is "18052" or later
(23)Data logging
Number Name Meaning Explanation
Set by
(When Set)
Corresponding
ACPU
M9
Corresponding
CPU
SM1925
Backup status
flag
OFF: Not being
executed
ON: Being executed
This relay turns on during execution of
backup.
S (Status
change)
New
QnUDV
*1
SM1926
Backup
execution
request
OFF: Not requested
ON: Requested
If this relay is turned off and then on, backup
execution request is issued when the END
processing of the scan is executed. This
relay is turned off by the system after the
backup is completed.
S (Status
change)/U
New
QnUDV
*1
SM1928
Restoration
status flag
OFF: Not being
executed
ON: Being executed
This relay turns on during execution of
restoration
S (Status
change)
New
QnUDV
*1
SM1929
Restoration
execution
request
OFF: Not requested
ON: Requested
If this relay is turned off and then on when the
CPU module is in STOP state, restoration
execution request is issued. This relay is
turned off by the system after the restoration
is completed.
S (Status
change)/U
New
QnUDV
*1
SM1931
Retry status flag
for automatic
backup
OFF: Not being
executed
ON: Being executed
This relay turns on during the retry of the
automatic backup. (This relay turns on at the
start of the retry, and turns off when the
automatic backup is triggered by the retry
while the exclusive functions are not
executed, or when the specified number of
retries are attempted.)
S (Status
change)
New
QnUDV
*2
Number Name Meaning Explanation
Set by
(When Set)
Corresponding
ACPU
M9
Corresponding
CPU
SM1938
Data logging
restart flag at
error stop
OFF: Not restarted
ON: Restarted
When SM960 (Data logging error check flag)
is ON, the data logging is restarted by turning
off and then on this relay. This relay is turned
off when the CPU module is powered off and
then on or is reset.
UNew
QnUDV
*2
LCPU
*3
SM1940
Data logging
setting No.1
Data logging
preparation
OFF: Not ready
ON: Ready
This relay turns on when the system is ready
for data logging.
This relay remains on even after data logging
is suspended. However, this relay turns off
when data logging is stopped.
S (Initial) New
QnUDV
LCPU
SM1941
Data logging
setting No.1
Data logging start
OFF: Pause
ON: Start
This relay is turned on to start data logging
while the CPU module is set to RUN and is
turned off to suspend data logging. (The
related special relays will all turn off.)
Even if this relay is turned on while the CPU
module is set to STOP, data logging will not
be started.
S (Status
change)/U
New
QnUDV
LCPU
SM1942
Data logging
setting No.1
Data logging
collection
OFF: Not being
collected
ON: Being collected
This relay is on while data logging is being
collected.
S (Status
change)
New
QnUDV
LCPU