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CIO (Core I/O) Area
CIO Area addresses run from words CIO 0000 through CIO 2555 and bits
CIO 000000 through CIO 255515 and are divided into eight data areas. Five of
these data areas are used to control I/O points and Special Units, and three data
areas are used to manipulate and store data internally. The CIO Area is accessi-
ble either by bit or by word. No prefix is required when inputting data area ad-
dresses; the CIO prefix is used only for clarity in descriptions.
The name, range, and function of each data area within the CIO Area are sum-
marized in the following table. internal I/O memory addresses are in paren-
theses.
Area
Range
Function
I/O Area
Words: CIO 0000 to CIO 0127
Bits:
CIO 000000 to CIO 012715
($0000 to $007F)
Allocated to I/O in the System and used to control I/O
points. Bits not used to control I/O points can be used as
work bits. The PC Setup can be used to control allocations.
Once I/O table has been registered, input bits are displayed
on SSS with an I; output bits, with a Q.
Work Area
Words: CIO 0128 to CIO 0199
Bits:
CIO 012800 to CIO 019915
($0080 to $00C7)
These bits are used in the program to manipulate or to
temporarily store data.
SYSMAC BUS/2
Area
Words: CIO 0200 to CIO 0999
Bits:
CIO 020000 to CIO 099915
($00C8 to $03E7)
These bits are used for remote I/O points in the SYSMAC
BUS/2 Remote I/O System unless the default allocations
are changed in the PC Setup.
Bits not used to control I/O points can be used as work bits.
Link Area
Words: CIO 1000 to CIO 1199
Bits:
CIO 100000 to CIO 119915
($03E8 to $04AF)
These bits are used for SYSMAC NET Link and SYSMAC
LINK (Controller Link) Systems. Bits not used for data links
can be used as work bits. These bits can be set as holding
bits via PC Setup.
Holding Area
Words: CIO 1200 to CIO 1499
Bits:
CIO 120000 to CIO 149915
($04B0 to $05DB)
Used to store data and to retain the data values when the
power is turned off.
CPU Bus Unit
Area
Words: CIO 1500 to CIO 1899
Bits:
CIO 150000 to CIO 189915
($05DC to $076B)
Used to store the operating status of CPU Bus Units. Bits
not used by CPU Bus Units can be used as work bits.
These bits can be set as holding bits via the PC Setup.
CompoBus/D
Areas
Words: CIO 1900 to CIO 1963
Bits:
CIO 190000 to CIO 196315
($076C to $0AB)
Words: CIO 2000 to CIO 2063
Bits:
CIO 200000 to CIO 206315
($07D0 to $080F)
These bits are used in CompoBus/D networks. Bits not used
for CompoBus/D can be used as work bits.
Work Areas
Words: CIO 1964 to CIO 1999
Bits:
CIO 196400 to CIO 199915
($07AC to $07CF)
Words: CIO 2064 to CIO 2299
Bits:
CIO 206400 to CIO 229915
($0810 to $08FB)
These bits are used in the program to manipulate or to
temporarily store data. These bits can be set as holding bits
via the PC Setup.
SYSMAC BUS
Area
Words: CIO 2300 to CIO 2555
Bits:
CIO 230000 to CIO 255515
($08FC to $09FB)
These bits are used for remote I/O points in the SYSMAC
BUS Remote I/O System unless the default allocations are
changed in the PC Setup.
Bits not used to control I/O points can be used as work bits.
Up to word 2399 can be set as holding bits via the PC
Setup.
CIO (Core I/O) Area
Section 3-3
Summary of Contents for CVM1D
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