Mitsubishi MELSEC L Series User Manual page 332

Number Name Meaning
Status of latch
SD671 data backup Status display
function
Backup time
SD672 (Year and
month)
Backup time
SD673 (Day and
hour)
Backup
Backup time
information
SD674 (Minute and
second)
Backup time
SD675 (Year and day
of week)
330
Explanation
This register stores the execution status of latch data backup in
the following bit pattern.
Presence/
Status absence of
backup data
0 No backup data Absent
Restore ready
1
completion
Restore execution
2 *1
completion
Present
3 Backup execution wait *2
Restore repeated
4 execution ready
completion
*1 Indicates status immediately after restoration.
*2 Indicates status after the CPU module is powered off and
then on while the CPU module is in the "2: Restore
execution completion" status.
This register stores the year (last two digits) and the month
when data were backed up in 2-digit BCD.
b15 to b12 b11 to b8 b7 to b4 b3
Year Month
This register stores the day and the hour when data were
backed up in 2-digit BCD.
b15 to b12 b11 to b8 b7 to b4 b3
Day Hour
This register stores the minute and the second when data were
backed up in 2-digit BCD.
b15 to b12 b11 to b8 b7 to b4 b3
Minute Second Second
This register stores the year (first two digits) and the day of the
week when data were backed up in BCD.
b15 to b12 b11 to b8 b7 to b4 b3
Higher digits of year (0 to 99)
Set by
(When Set)
Restore operation at
turning power supply
ON from OFF
Restoring not executed
Restoring executed when
turning power supply
ON from OFF the
following time
(Status
Restoring not executed
change)
Restoring not executed
Restoring executed
when turning power
supply ON from OFF
Example:
to b0
July, 1993
9307
H
Example:
to b0
31st, 10 a.m.
3110
H
to b0 Example:
(At write)
35 min., 48 sec.
3548
H
to b0
Example:
1993, Friday
1905
H
Day of the week
0
Sunday
1
Monday
2
Tuesday
3
Wednesday
4
Thursday
5
Friday
6
Saturday
Corre-
Corre-
sponding
sponding
ACPU
CPU
D9
S
QnU
LCPU
New
S