Omron SYSMAC CV Series Operation Manual page 56

CIO (Core I/O) Area
Basic I/O Allocation
Starting point
Rack #1
Empty slots or Units not
requiring word allocation
(no words allocated)
Rack Changes
44
on the left of the CPU Rack is an Input Unit, the top terminals (i.e., the top
input point) will be assigned CIO 000000, the next terminals, CIO 000001,
and so forth for all of the terminals on the Unit. The allocation order is illus-
trated below. Arrows indicate the order in which words are allocated to Units
for the rack number settings indicated.
CPU Rack
Expansion CPU Rack
Once Units have been mounted and the I/O Table Registration operation has
been performed, a change to any Unit mounted to a Rack that affects the
type of I/O word, or the number of words required by the Unit will cause an
I/O verification error to occur. This includes adding Units to previously un-
used slots or removing Units that have already been allocated word(s). A
Unit can, however, be replaced with another Unit that requires the same
number of input words and the same number of output words without gener-
I/O Word Allocation Example
Expansion I/O Rack Expansion I/O Rack
Rack #1
Expansion I/O Rack
Rack #3
Expansion I/O Rack
Rack #2
Section 3-3
CPU Rack