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Number
Name
Meaning
Parameter
Parameter enable
SD670
enable drive
drive No.
information
Status of latch
SD671
data backup
Status display
function
Backup time (Year
SD672
and month)
Backup time (Day
SD673
and hour)
Backup time
Backup
SD674
(Minute and
information
second)
Backup time (Year
SD675
and day of week)
12 - 55
Table12.23 Special register
Explanation
• Stores information of parameter storage destination drive which is
enabled.
0: Drive 0 (Program memory)
1: Drive 1 (SRAM card)
2: Drive 2 (Flash card/ATA card)
4: Drive 4 (Standard ROM)
(Only drive 0 and drive 4 are valid in the Q00UJCPU, Q00UCPU, and
Q01UCPU.)
Indicates the status of the latch data backup function.
Presence/
Status
absence of
backup data
0
No backup data
Absent
Restore ready
1
completion
Restore execution
2
completion
Present
3
Backup execution wait
Restore repeated
4
execution ready
completion
• "2 Restore ready completion" is a status immediately after restoring
data.
"3 Backup execution wait" is a status after turning power supply ON from
OFF at "2 Restore ready completion".
• Stores the last 2 digits of year and month when backup is performed in
2-digit BCD code.
b15
to
b12
b11
to
b8
b7
to
b4
b3
Year
Month
• Stores the day and hour when backup is performed in 2-digit BCD code.
b15
to
b12
b11
to
b8
b7
to
b4
b3
Day
Hour
• Stores the minute and second when backup is performed in 2-digit BCD
code.
b15
to
b12
b11
to
b8
b7
to
b4
Minute
Second
Second
• Stores the first 2 digits of year and day of week when backup is
performed in BCD code.
b15
b12
b11
b8
b7
b4
to
to
to
Higher digits of year (0 to 99)
Restore operation at
turning power supply
ON from OFF
Restoring not executed
Restoring executed when
turning power supply
ON from OFF the
following time
Restoring not executed
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
Example:
b3
to
b0
35 min., 48 sec.
3548
H
b3
b0
to
Example:
1993, Friday
1905
H
Day of the week
0
Sunday
1
Monday
2
Tuesday
3
Wednesday
4
Thursday
5
Friday
6
Saturday
Corres-
ponding
Set by
Corresponding
ACPU
(When Set)
D9
S (Initial)
New
S (Status
New
change)
S (At write)
New
CPU
QnU
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