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Number
Name
Meaning
Base type
differentiation
0: QA**B is
A/Q base
installed
differentiation
(A mode)
1: Q**B is installed
(Q mode)
Base type
Installed Q base
differentiation
presence/
0: Base not
absence
installed
1: Q**B is installed
SD242
Base type
Installed Q base
differentiation
presence/
0: Base not
absence
installed
1: Q**B is installed
SD243
No. of base
No. of base slots
slots
SD244
SD243
No. of base
slots (Operation
No. of base slots
status)
SD244
SD245
No. of base
slots (Mounting
No. of base slots
status)
SD246
Loaded
Loaded maximum
SD250
maximum I/O
I/O No.
*9: Function version is B or later.
CHAPTER12 PECIAL RELAY LIST AND SPECIAL REGISTER LIST
Table12.20 Special register
Explanation
b7
b2
b1
b0
Fixed to 0
to
Main base unit
1st extension
base
2nd extension
base
7th extension
base
b4
b2
b1
b0
Fixed to 0
to
b7
b2
b1
b0
Fixed to 0
to
Main base unit
1st extension
base
2nd extension
base
7th extension
base
• The bits from the third extension stage to the seventh extension stage
are fixed to "0" in the Q00UJCPU.
• The bits from the fifth extension stage to the seventh extension stage are
fixed to "0" in the Q00UCPU, Q01UCPU, and Q02UCPU.
b15 to b12 b11 to b8 b7 to b4 b3 to b0
Extension
Extension
Extension
SD243
3
2
Extension
Extension
Extension
SD244
7
6
• As shown above, each area stores the number of slots being installed.
• The bits from the third extension stage to the seventh extension stage
are fixed to "0" in the Q00UJCPU.
• The bits from the fifth extension stage to the seventh extension stage are
fixed to "0" in the Q00UCPU, Q01UCPU, and Q02UCPU.
b15 to b12 b11 to b8 b7 to b4 b3 to b0
Extension
Extension
Extension
SD243
3
2
Fixed to
Fixed to
Fixed to
SD244
0
0
• As shown above, each area stores the number of slots being installed.
(Number of set slots when parameter setting has been made)
b15 to b12 b11 to b8 b7 to b4 b3 to b0
Extension
Extension
Extension
SD245
3
2
Fixed to
Fixed to
Fixed to
SD246
0
0
• As shown above, each area stores the number of module-mounted slots
of the base unit (actual number of slots of the installed base unit).
• When SM250 goes from OFF to ON, the upper 2 digits of the final I/O
number plus 1 of the modules loaded are stored as BIN values.
• The upper 2 digits of the final I/O number plus 1 of the modules loaded
are stored as BIN values.
Set by
(When Set)
S (Initial)
Fixed to 0
when the
base is not
to
installed.
Main base unit
S (Initial)
1st extension base
2nd extension base
to
4th extension base
Fixed to 0
when the
S (Initial)
base is not
to
installed.
Main
1
Extension
5
4
S (Initial)
Main
1
Extension
S (Initial)
0
4
Main
1
Extension
S (Initial)
0
4
S (Request
END)
S (Initial)
Corres-
ponding
Corresponding
ACPU
CPU
D9
Qn(H)
New
QnPH
QnPRH
New
Q00J/Q00/Q01
New
QnU
Qn(H)
QnPH
New
QnPRH
QnU
Q00J/Q00/Q01
New
*9
Q00J/Q00/Q01
Qn(H)
New
QnPH
QnPRH
Q00J/Q00/Q01
New
QnU
12 - 44
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2
3
12
6
7
8
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