38
The following figure shows the word allocation for a fully expanded C200H with
three 8-slot Backplanes.
Wd
000
Wd
005
Wd
001
Wd
002
Wd
003
Wd
004
Wd
006
Wd
007
CPU
Unit
Wd
010
Wd
015
Wd
011
Wd
012
Wd
013
Wd
014
Wd
016
Wd
017
Wd
020
Power
Supply
Wd
025
Wd
021
Wd
022
Wd
023
Wd
024
Wd
026
Wd
027
Power
Supply
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 Slave Racks
Unit number IR address Unit number IR address
0 100 to 109 0 050 to 059
1 110 to 119 1 060 to 069
2 120 to 129 2 070 to 079
3 130 to 139 3 080 to 089
4 140 to 149 4 090 to 099
5 150 to 159
6 160 to 169
7 170 to 179
8 180 to 189
9 190 to 199
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.
Allocation for Special I/O
Units and Slave Racks
Allocation for Optical I/O
Units
Allocation for Remote I/O
Master and Link Units
I/O Word Allocation Section 4-1
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