I/O Allocation Concepts; Allocations On The Cpu Unit - Omron CP1E CPU UNIT SOFTWARE User Manual

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I/O Allocation Concepts

The CPU Unit automatically allocates I/O bits to the Expansion I/O Units and Expansion Units, if con-
nected when the power supply is turned ON.
It is not necessary to specify I/O bits allocation.
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Allocations on the CPU Unit

Input bits are allocated from CIO 0 and output bits are allocated from CIO 100
The first word from which input bits are allocated is CIO 0. The first word from which output bits are allo-
cated is CIO 100. These cannot be changed.
Words Allocated by the System and the Number of Connected Units
The starting words for inputs and outputs are predetermined for a CP1E CPU Unit. Input bits in CIO 0,
or CIO 0 and CIO 1, and output bits in CIO 100, or CIO 100 and CIO 101, are automatically allocated to
the built-in I/O on the CPU Unit.
The words from which bits are allocated by the system and the number of Expansion I/O Units and
Expansion Units that can be connected are given in the following table.
CPU Unit
E10/14/20 or
N14/20 CPU Unit
E30/40 or N30/40
CPU Unit
N60 CPU Unit
NA20 CPU Unit
Application Example: CPU Unit with 40 I/O Points
Input Bits
Output Bits
CIO 0
Input Bits
CIO 1
CIO 100
Output Bits
CIO 101
For a CPU Unit with 40 I/O points, a total of 24 input bits are allocated to the input terminal block. The
bits that are allocated are input bits CIO 0.00 to CIO 0.11 (i.e., bits 00 to 11 in CIO 0) and input bits CIO
1.00 to CIO 1.11 (i.e., bits 00 to 11 in CIO 1).
In addition, a total of 16 output bits are allocated to the output terminal block. The bits that are allocated
are output bits CIO 100.00 to CIO 100.07 (i.e., bits 00 to 07 in CIO 0) and output bits CIO 101.00 to CIO
101.07 (i.e., bits 00 to 07 in CIO 1).
CP1E CPU Unit Software User's Manual(W480)
Allocated words
Input Bits
CIO 0
CIO 0 and CIO 1
CIO 0, CIO 1 and CIO 2
CIO 0, CIO 90 and CIO 91 CIO 100 and CIO 190
CPU Unit with 40 I/O Points
CIO 0 (CIO 0.00 to CIO 0.11)
CIO 1 (CIO 1.00 to CIO 1.11)
24 inputs
16 outputs
CIO 100 (CIO 100.00 to CIO 100.07)
CIO 101 (CIO 101.00 to CIO 101.07)
15 14 13 12 11 10
Cannot be used
Cannot be used
Output Bits
CIO 100
CIO 100 and CIO 101
CIO 100, CIO 101 and CIO 102
09 08 07 06 05 04
Input bits: 24
Output bits: 16
6 I/O Allocation
Number of Expansion
Units and Expansion I/O
Units connected
0 Unit
3 Units
3 Units
3 Units
03 02 01 00
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