Addressing external i/o, Preface – Rockwell Automation 9323-PA1E QUICK START GUIDE APS 6.0 User Manual

Page 23

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Preface

APS Quick Start for New Users

2–6

OUT

4

OUTPUT

OUT 0
OUT 1
OUT 2
OUT 3
OUT 4
OUT 5
OUT 6
OUT 7

0

Output Data File

address data
O:3 0000 0000

Output Module in slot 3

Pilot light 0 is wired to terminal 0. The

pilot light will be energized when the

processor has completed

evaluation of the program and

transfers the ON/OFF status to

the outputs.

Status bit 0

corresponds to

terminal 0 of the output

module in slot 3.

When an output data file status bit is a 1, the corresponding external output circuit will be energized (ON).
When an output data file status bit is a 0, the corresponding external output circuit is deĆenergized (OFF).

Addressing External I/O

As pointed out in the last section, external inputs and outputs are linked to the input
data file and output data file of the processor file. Each status bit in these files has
an address. You specify the appropriate address when you enter an instruction in
your ladder program.

For our purposes, input addresses have the form

I:e/b

where

I

= Input data file

:

= Element or slot delimiter

e

= Slot number of the input module

/

= Bit or terminal delimiter

b

= Terminal number used with input device

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