Omron SYSMAC CS Series Operation Manual page 431

Programmable controllers
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Allocating First Words to Racks
For Racks in which the first word address has not been set, words are allo-
cated in rack-number order (lowest to highest) continuing from the last word
allocated to the previous rack and starting with CIO 0000 on the first Rack for
which the first word is not set.
Example: Setting the First Words for Racks
In this example, the first words have been set for Racks 0 (the CPU Rack), 2,
and 3. For simplicity, only 16-bit Units have been used.
Rack number 0
First word:
CIO 0100
Rack number 1
First word:
CIO 0200
Rack number 2
No first word
setting
Rack number 3
First word:
CIO 0300
Rack First Word Settings
Rack
CPU Rack
CIO 0100
Rack 1
CIO 0200
Rack 2
Not set
Rack 3
CIO 0300
CIO
CIO
CIO
CIO
CIO
0103
0100
0101
0102
0104
CIO
CIO
CIO
CIO
Empty
0203
0200
0201
0202
CIO
CIO
CIO
CIO
CIO
0000
0001
0002
0003
0004
CIO
CIO
CIO
CIO
CIO
0300
0301
0302
0303
0304
First word
Section 8-3
CPU Rack
CS Expansion Rack
CS Expansion Rack
CS Expansion Rack
393

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