Cpu Bus Unit Area; Compobus/D Areas; Sysmac Bus Area - Omron SYSMAC CVM1 Series Operation Manual

CIO (Core I/O) Area

3-3-6 CPU Bus Unit Area

3-3-7 CompoBus/D Areas

3-3-8 SYSMAC BUS Area

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The Holding Area retains status when the operating mode is changed, power is
interrupted, or PC operation is stopped.
Holding Area bits and words can be used to preserve data whenever PC opera-
tion is stopped. Holding bits also have various special applications, such as
creating latching relays with the KEEP instruction and forming self-holding out-
puts. These are discussed in Section 4 Writing Programs and Section 5 Instruc-
tion Set.
Two types of external bus are provided for CVM1, CVM1D, and CV-series PCs:
the high-speed CPU bus (S Bus) and the I/O bus. Units that connect to the CPU
bus on the CPU or Expansion CPU Rack are called CPU Bus Units and include
the SYSMAC NET Link Unit, SYSMAC LINK Unit, Controller Link Unit, Host Link
Unit, CompoBus/D Master Unit, SYSMAC BUS/2 Remote I/O Master Unit, BA-
SIC Unit, and Personal Computer Unit.
CPU Bus Unit Area addresses range from CIO 1500 through CIO 1899. These
400 words are divided into 16 groups of 25 words each. These are allocated to
CPU Bus Units according their unit number settings as shown in the following
tables.
Unit # 0
CIO 1500
words to
1524
Unit # 8
CIO 1700
words to
1724
An additional1600 words in the DM Area (D02000 to D03599) are provided for
CPU Bus Units. The particular function of words allocated to the Unit depends on
the CPU Bus Unit being used.
I/O bits allocated to CompoBus/D correspond to external I/O points on the de-
vices connected to the CompoBus/D device network. Refer to CompoBus/D
(DeviceNet) Operation Manual (W267) for further information.
Words
CIO 1900 to CIO 1963 (64 words)
CIO 2000 to CIO 2063 (64 words)
Note Bits not used for CompoBus/D can be used as work bits.
I/O bits allocated in the SYSMAC BUS Area correspond to external I/O points on
I/O Terminals, Optical I/O Units, or I/O Units mounted to Slave Racks that are
connected to SYSMAC BUS Remote I/O Master Units (RM). Up to 8 Masters
can be connected to the PC and the total number of I/O points in the SYSMAC
BUS System must not exceed 2,048 (128 words).
Unit numbers are assigned to Masters automatically when the I/O Table is regis-
tered or edited, according to the order in which the Masters are mounted (taking
into account rack number settings). The first word allocated to each Master can
be changed with the PC Setup using the SSS.
1 2 3
1525 1550 1575
to to to
1549 1574 1599
9 10 11
1725 1750 1775
to to to
1749 1774 1799
CIO 190000 to CIO 196315 (1,024 bits)
CIO 200000 to CIO 206315 (1,024 bits)
Section 3-3
4 5 6
1600 1625 1650
to to to
1624 1649 1674
12 13 14
1800 1825 1850
to to to
1824 1849 1874
Bits
7
1675
to
1699
15
1875
to
1899