36
Unit Numbers and I/O Word Allocation Section 3-2
This example System shows word allocations for two C200H Masters, one on
the CPU Rack and one on an Expansion I/O Rack, two of the maximum pos-
sible five C200H Slaves, and two extra Expansion I/O Racks. The extra Ex-
pansion I/O Racks are counted as two more Slaves in the maximum of five
and automatically allocated word for unit numbers. (The unallocated I/O
words may be used as work words.)
C200H
Master
Slave Rack
IR 54
IR 53
IR 52
IR 51
IR 50
IR 4
IR 3
IR 2
Set to Unit #0.
IR 0
IR 64
IR 63
IR 62
IR 61
IR 60
IR 074
IR 073
IR 072
IR 071
IR 070
IR 84
IR 83
IR 82
IR 81
IR 80
IR 14
IR 13
IR 12
Set to Unit #1.
IR 10
Slave Rack
C200H
Master
C200H Expansion I/O Rack
C200H Expansion
I/O Rack
C200H Expansion
I/O Rack
I/O Connecting
Cable
Set to Unit #0 and
“C200H Master
,”
and as terminator
.
Automatically al
-
located words for
Unit #1.
Automatically al
-
located words for
Unit #2.
Set to Unit #2 and
“C200H Master
,”
and as terminator
.
C200H CPU Rack
#0
#3
Example 2: C200H Masters,
Slaves, and Extra
Expansion I/O Racks
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