Omron SYSMAC C200H CPU01-E Installation Manual page 47

IR Word Allocation
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The CPU Rack begins with word 000 at the leftmost slot. The first Expansion I/O
Rack begins with word 010, and the second Expansion I/O Rack with word 020.
The first word of each Rack is fixed, regardless of the model of Backplane used.
As with the I/O bits unused by individual I/O Units, the bits of the I/O words un-
used by a Backplane can be used as work bits. The following figure shows the
relationship between the model of Backplane and I/O words. The shaded bits
can only be used as work bits.
Word 000 001
00 00
bits
15 15
Word 000 001
00 00
bits
15 15
Word 000 001
00 00
bits
15 15
Note The C200H-OC225/OD212/OD21A 16-point Output Unit and C200H-B7AO1
B7A Interface Unit can be mounted only to a C200H-BC
For example, if a PC consists of three 8-slot Racks with 8-point I/O Units
mounted to all I/O Unit mounting positions, the number of I/O points for the entire
PC will be:
8 points x 8 slots x 3 Racks = 192 points
If a PC consists of three 8-slot Racks with the I/O Unit mounting positions equally
divided between 16-point Input Units and 12-point Output Units, the number of
I/O points for the entire PC will be:
Input points = 16 points x 4 slots x 3 Racks = 192 points
Output points = 12 points x 4 slots x 3 Racks = 144 points
Total I/O points = 192 + 144 = 336
C200H-BC031 Backplane
005
002 003 004
00 00 00 00
15 15 15 15
C200H-BC051-V1 Backplane
005
002 003 004
00 00 00 00
15 15 15 15
C200H-BC081-V1 Backplane
005
002 003 004
00 00 00 00
15 15 15 15
Section 4-1
006 007 008 009
00 00 00 00
15 15 15 15
006 007 008 009
00 00 00 00
15 15 15 15
006 007 008 009
00 00 00 00
15 15 15 15
1-V1/V2 Backplane.
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