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Number
Name
Meaning
Clock data
SD213
Clock data
(higher digits of
year, day of week)
SD220
SD221
SD222
SD223
LED display
LED display data
data
SD224
SD225
SD226
SD227
The header I/O
Module to which
number of the
online module
module to which
SD235
change is being
online module
performed
change is being
performed /10
0: Automatic
SD240
Base mode
mode
1: Detail mode
0: Main base only
Extension stage
SD241
1 to 7: Extension
number
stage number
12 - 43
Table12.20 Special register
Explanation
• The year (first two digits) and the day of the week are stored as BCD
code as shown below.
b15
to
b12
b11
to
b8
b7
Higher digits of year (19 or 20)
• LED display ASCII data (16 characters) stored here.
(On the Basic model QCPU, the registers store the message (16
characters of ASCII data) at error occurrence (including annunciator
ON).
b15
to
15th character from
SD220
the right
13th character from
SD221
the right
11th character from
SD222
the right
9th character from
SD223
the right
7th character from
SD224
the right
5th character from
SD225
the right
3rd character from
SD226
the right
1st character from
SD227
the right
• The LED display device data at the time of CHK is not stored in the
Basic model QCPU and the Universal model QCPU.
• 10
is added to the value of the header I/O number of which the online
H
module change is being performed.
H
• Stores the base mode.
• Stores the maximum number of the extension bases being installed.
to
b4
b3
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
b8 b7
b0
to
16th character from
the right
14th character from
the right
12th character from
the right
10th character from
the right
8th character from
the right
6th character from
the right
4th character from
the right
2nd character from
the right
Corres-
ponding
Set by
Corresponding
ACPU
(When Set)
D9
S (Request)/U
D9028
S (When
New
changed)
S (During online
New
module change)
S (Initial)
New
S (Initial)
New
CPU
QCPU
QnPH
QnPRH
QCPU
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