31
Unit Numbers and I/O Word Allocation Section 3-2
Because the I/O Units are allocated words starting at the lower end (word
00), duplication can be avoided by starting Remote Terminal words from the
upper end, i.e., from 31 in all Systems except C120 Systems, where it is best
to start word settings backward from 15. Do not set words that are already
being used for other I/O points.
16
pts.
32 pts.
64 pts.
16 pts.
IR 7
IR 5 & 6
IR 1, 2, 3, & 4
IR 0
CPU Rack
Remote T
erminal
IR 30
Remote T
erminal
IR 31
Set as terminator
Master
Example 2: C500 with
Remote Terminals
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