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The following table shows which bits can be used as I/O bits in each of the

Expansion I/O Units. Bits in the shaded areas can be used as work bits but

not as output bits. The word addresses depend on the Unit(s) that the Expan-

sion I/O Unit is coupled to. In all cases the first Expansion I/O Unit address

for input and output words is one more than the last address for input and

output words used by the Unit to which the Expansion I/O Unit is attached.

For example, if the last word address was IR 03, the first input or output word

address for the Expansion I/O Units will be IR 04. In the tables below “n” is

the word allocated prior to the Expansion I/O Unit.

IR (n+1)

IR (n + 6)

IR (n + 2)

IR (n + 6)

IR (n + 2)

IR (n + 1)

IR (n + 6)

Model Input bits Output bits Model Input bits Output bits

C20P

C16P

Input

C28P

C40P

C60P

C16P

Output

C4K

Input

C4K

Output

Cannot

be used

Cannot

be used

Cannot

be used

IR (n+1)

IR (n + 6)

IR (n + 4)

IR (n + 1)

Cannot

be used

Cannot

be used

IR (n + 6)

I/O Bits Available in

Expansion I/O Units

IR Area Section 3–3

Brand	Omron
Model	SYSMAC C20P
Category	Controller
Language	English

Omron SYSMAC C20P User Manual

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