Omron SYSMAC C200H Installation Manual page 47

I/O Word Allocation
Allocation for Special I/O
Units and Slave Racks
Allocation for Optical I/O
Units
Allocation for Remote I/O
Master and Link Units
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The following figure shows the word allocation for a fully expanded C200H with
three 8-slot Backplanes.
Wd Wd Wd
000 001 002
Wd Wd Wd
010 011 012
Wd Wd Wd
020 021 022
Up to ten Special I/O Units may be mounted in any slot of the CPU Rack or Ex-
pansion I/O Racks. Up to five Slave Racks may be used, whether one or two
Masters are used. IR area words are allocated to Special I/O Units and Slave
Racks by the unit number on the Unit, as shown in the following tables.
Special I/O Units
Unit number IR address
0
1
2
3
4
5
6
7
8
9
The C500-RT001/002-(P)V1 Remote I/O Slave Rack may be used, but it re-
quires 20 I/O words, not 10, and therefore occupies the I/O words allocated to 2
C200H Slave Racks, both the words allocated to the unit number set on the rack
and the words allocated to the following unit number. When using a C200H CPU
Unit, do not set the unit number on a C500 Slave Rack to 4, because there is no
unit number 5. I/O words are allocated only to installed Units, from left to right,
and not to slots as in the C200H system.
I/O words between IR 200 and IR 231 are allocated to Optical I/O Units by unit
number. The I/O word allocated to each Unit is IR 200+n, where n is the unit num-
ber set on the Unit.
Remote Master I/O Units, SYSMAC LINK Units, SYSMAC NET Link Units, and
Host Link Units do not use I/O words, and the PC Link Units use the LR area, so
words allocated to the slots in which these Units are mounted are available as
work words.
Wd
Wd Wd
005
003 004
Wd
Wd Wd
015
013 014
Wd Wd Wd
023 024 025
Slave Racks
Unit number IR address
100 to 109 0
110 to 119 1
120 to 129 2
130 to 139 3
140 to 149 4
150 to 159
160 to 169
170 to 179
180 to 189
190 to 199
Section 4-1
CPU
Wd Wd
Unit
006 007
Wd Wd Power
016 017 Supply
Wd Wd
Power
026 027
Supply
050 to 059
060 to 069
070 to 079
080 to 089
090 to 099