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3-3-3 SYSMAC BUS/2 Area
I/O bits allocated in the SYSMAC BUS/2 Area correspond to I/O points on I/O
Terminals (group-1 and group-2 Slaves), Units mounted to Slave Racks
(group-3 Slaves), or other Units connected to SYSMAC BUS/2 Remote I/O Mas-
ter Units (RM/2). Up to four Masters can be connected. The total number of I/O
points required for I/O Terminals, Units on Slave Racks, and other Units in the
SYSMAC BUS/2 Remote I/O System must not exceed 2,048 (128 words).
SYSMAC BUS/2 Area address allocation can be customized with the PC Setup
using the SSS. The first word allocated to the group-1, group-2, and group-3
Slaves, as well as the size of each of these areas, can be changed. The following
table shows the default address allocations.
RM/2 #
Group-1 Slaves*
Group-2 Slaves*
Group-3 Slaves
0
CIO 0200 to CIO 0249
CIO 0250 to CIO 0299
CIO 0300 to CIO 0399
1
CIO 0400 to CIO 0449
CIO 0450 to CIO 0499
CIO 0500 to CIO 0599
2
CIO 0600 to CIO 0649
CIO 0650 to CIO 0699
CIO 0700 to CIO 0799
3
CIO 0800 to CIO 0849
CIO 0850 to CIO 0899
CIO 0900 to CIO 0999
*Group-1 Slaves allocated up to 64 I/O points. Group-2 Slaves are medium-sized Units
allocated up to 128 I/O points. Group-3 Slaves are used to form Slave Racks.
As with I/O area allocations to CPU, Expansion CPU, and Expansion I/O Racks,
word allocation begins with the Slaves connected to the Master with the lowest
unit number, RM/2 #0, regardless of the order that the Masters are mounted.
Likewise, word allocation to Units connected to RM/2 #0 begins with the Slaves
that have the lowest unit numbers, regardless of the order that the Slaves are
mounted.
Up to 8 Slave Racks can be connected to each RM/2 Master. Word addresses
are assigned to Units on Slave Racks in the order in which they are mounted left
to right. Refer to the SYSMAC BUS/2 Remote I/O System Manual for details on
word allocation to Slaves and Units on Slave Racks.
After the I/O Table has been registered or edited, an “I” will appear before input
bit addresses and a “Q” will appear before output bit addresses on SSS displays.
Refer to the SSS Operation Manuals for details on the PC Setup.
3-3-4 Link Area
The Link Area is used as a common data area to automatically transfer informa-
tion between PCs. This data transfer is achieved through data links in either a
SYSMAC LINK System, SYSMAC NET Link System, or a Controller Link Sys-
tem. Link Area addresses run from CIO 1000 through CIO 1199. Link Area
words CIO 1000 through CIO 1063 and DM Area words D00000 through
D00127 are automatically used for data link tables (in a SYSMAC LINK or SYS-
MAC NET Link System) unless specific link words are designated. Allocations
can be designated from the SSS. Refer to the SSS Operation Manuals, and the
SYSMAC LINK System Manual, SYSMAC NET Link System Manual, or Con-
troller Link Unit Operation Manual for details.
3-3-5 Holding Area
The Holding Area is used to store/manipulate various kinds of data and can be
accessed either by word or by bit. Holding Area bits can be used in any order
required and can be programmed as often as required.
The default Holding Area word addresses range from CIO 1200 through
CIO 1499; bit addresses, from CIO 120000 through CIO 149915. The range of
the Holding Area can be changed to any size between CIO 1000 through
CIO 2399 with the PC Setup from the SSS. If the Holding Area is increased, it will
overlap other areas. An “H” will appear before Holding Area bit addresses on the
SSS screen. Refer to the SSS Operation Manuals for details.
CIO (Core I/O) Area
Section 3-3
Summary of Contents for CVM1D
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