Assigning addressing modes, racks, and groups – Rockwell Automation 1785-LTx,D17856.2.1 Classic PLC-5 Programmable Controllers Users Manual User Manual

Page 43

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Chapter

4

4-1

Assigning Addressing Modes,

Racks, and Groups

This chapter conveys basic hardware addressing concepts and gives you
guidelines with which to choose the addressing modes (including
complementary I/O), racks, and groups to use in your system.

If you want to read about:

Go to

page:

Placing I/O modules in chassis

4Ć1

Understanding terms

4Ć2

Choosing I/O addressing mode

4Ć3

Rack number assignments

4Ć9

Addressing complementary I/O

4Ć12

Place I/O modules in a chassis depending on the electrical characteristics
of the modules. The placement is made left to right, with the left-most
position being closest in the chassis to the PLC-5 processor or the I/O
adapter module. The placement order is as follows:

1. block-transfer modules (all types)
2. dc input modules, placed left to right from lowest to highest voltages
3. dc output modules, placed left to right from lowest to highest voltages
4. ac input modules, placed left to right from lowest to highest voltages
5. ac output modules, placed left to right from lowest to highest voltages

Chapter Objectives

Placing I/O Modules

in Chassis

System Design

Determined

Choosing

Communication

Transferring Discrete

and Block Data

Planning Your

System Programs

Calculating Program

Timing

Assigning Addressing

Mode, Racks,

and Groups

Choosing Hardware

Placing System

Hardware

Selecting Interrupt

Routines

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