Introduction - Omron CJ - 09-2009 Operation Manual

Introduction

9-1

Introduction

I/O Memory Area
Parameter Area
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The CPU Unit's memory (RAM with battery back-up) can be divided into three
parts: the User Program Memory, I/O Memory Area, and Parameter Area.
This section describes the I/O Memory Area and Parameter Area.
This region of memory contains the data areas which can be accessed by
instruction operands. The data areas include the CIO Area, Work Area, Hold-
ing Area, Auxiliary Area, DM Area, EM Area, Timer Area, Counter Area, Task
Flag Area, Data Registers, Index Registers, Condition Flag Area, and Clock
Pulse Area.
Instruction
This region of memory contains various settings that cannot be specified by
instruction operands; they can be specified from a Programming Device only.
The settings include the PLC Setup, I/O Table, Routing Table, and CPU Bus
Unit settings.
Programming Device
Section 9-1
I/O Memory Area
Parameter Area