Addressing external i/o, Preface – Rockwell Automation 9323-PA1E QUICK START GUIDE APS 6.0 User Manual
Page 23

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