I/O Allocations; Unit Types - Omron CS1D DUPLEX SYSTEM - 10-2009 Operation Manual

I/O Allocations

7-1

I/O Allocations

7-1-1

Unit Types

Basic I/O Units
Basic I/O Units
CS-series Basic I/O Units
222
In CS1D PLCs, memory must be allocated to the Units mounted in the PLC.
I/O tables containing the models and locations of all Units and the allocations
made to each must be created and these I/O tables must be registered in the
CPU Unit. When the power supply is turned ON, the I/O tables are compared
against the mounted Units to verify their accuracy. The methods for creating
I/O tables are the same for both Duplex CPU and Single CPU Systems.
Memory is allocated differently to Basic I/O Units, Special I/O Units, and CS-
series CPU Bus Units.
8-point/
16-point Units
32-point Units
64-point Units
I
CH II
CH
0
1
2
3
DI SP LA
Y
96-point Units
I/O Area
CIO 0000 to CIO 0319 (See note.)
Allocation (Memory is allocated in one-word
units based on mounting position in
the Racks.)
Note:
The Rack's first word setting can be
changed from the default setting
(CIO 0000) to any word from CIO 0000 to
CIO 0999. The first word setting can be
changed only with the CX-Programmer.
Section 7-1