Allocating First Words To Racks - Omron CJ2 CPU UNIT SOFTWARE User Manual

Cj2 cpu unit software

Hide thumbs Also See for CJ2 CPU UNIT SOFTWARE:

Table of Contents

8 I/O Allocations and Unit Settings

Allocating First Words to Racks

In the CJ-series PLCs, the first word allocated to each Rack can be set with the CX-Programmer's I/O

table edit operation. For example, the CPU Rack can be set to be allocated words starting with CIO

0000; the next Rack, words starting with CIO 0100; the next Rack, words starting with CIO 0200; etc.

This can make it easier to check word allocations to Units without calculating all the way from the CPU

Word Allocations

For Racks in which the first word address has been set, words are allocated to Units in the order that

the Units are mounted (from left to right) beginning with the specified first word. Words are not allo-

cated to empty slots.

For Racks in which the first word address has not been set, words are allocated in rack-number

order (lowest to highest) continuing from the last word allocated to the previous rack and starting

with CIO 0000 on the first Rack for which the first word is not set.

Example: Setting the First Words for Racks

First Rack word set to CIO 0100.

First Rack word set to CIO 0120.

First Rack word not set ∗

∗ (automatic allocation from CIO 0000).

First Rack word set to CIO 0140.

CJ2 CPU Unit Software User's Manual

Table of Contents