Omron CS1W-LC001 Operation Manual page 136

Exchanging Data with the CPU Unit
3-3-2-1 To exchange data at all times (CPU Unit Terminal block or Expanded
CPU Unit Terminal block)
118
Note The Loop Control Unit can use the CPU Unit Terminal block or Expanded
CPU Unit Terminal block (regardless of the user program on the CPU Unit) to
read and write to any I/O memory on the CPU Unit. For this reason, do not
perform reading and writing in duplicate on the same I/O memory address
between the Loop Control Unit and the CPU Unit.
The Loop Control Unit reads and writes data in any I/O memory on the CPU
Unit at all times (at each operation cycle) using the CPU Unit Terminal or
Expanded CPU Unit Terminal in the function block. Prepare the CPU Unit
Terminal or Expanded CPU Unit Terminal on CX-Process Tool, and
download the Terminal to the Loop Control Unit together with the other
function blocks.
Loop Control Unit
CPU Unit Terminal
block
There are a total of eight CPU Unit Terminals and Expanded CPU Unit
Terminals as follows:
Category Number of points
CPU Unit 128 contact inputs
terminal
128 contact outputs DO Terminal to CPU Unit (Block Model 452)
8 word inputs
8 word outputs
Expanded 64 contact inputs
CPU Unit
terminal
64 contact outputs
64 word inputs
64 word outputs
The following table shows the addresses of I/O memory that can be read and
written by the CPU Unit Terminal or Expanded CPU Unit Terminal.
I/O memory that can be specified by the CPU Unit Terminal or
Expanded CPU Unit Terminal
Area type
CIO (channel I/O)
Area
Work Area (W)
Holding Area (H)
CPU Unit
At each
I/O memory
operation
cycle
At each
operation
cycle
DI Terminal from CPU Unit (Block Model 451)
AI Terminal from CPU Unit (Block Model 453)
AO Terminal to CPU Unit (Block Model 454)
DI Terminal from Expanded CPU Unit (Block
Model 455)
DO Terminal to Expanded CPU Unit (Block Model
456)
AI Terminal from Expanded CPU Unit (Block Model
457)
AO Terminal to Expanded CPU Unit (Block Model
458)
CS1 Series CPU Unit
I/O memory address
0000 to 6134 words
W000 to 511 words
H000 to 511 words
Section
Function block
Remarks
Including I/O Area, CompoBus/D
Area, Data Link Area, Special I/O
Unit Allocated Area ( Á 1)
3-3