Rockwell Automation 9323-PA1E QUICK START GUIDE APS 6.0 - Manual (Page 25)

Preface
APS Quick Start for New Users
2–8
APS Display of Instructions/Addresses
APS displays I/O addresses as shown below.
] [
I:1
0
When you enter an XIC instruction (defined later) and the address
I:1/0, APS will display the address with the instruction as follows:
Input data file, slot 1
Terminal 0
] [
I:1
0
XIC instruction
Explanation:
Ladder Logic Concepts
As we mentioned earlier, the program files you create contain the program used for
your controlling application. The programs are written in a programming language
called Ladder Logic. This name is derived from its ladder-like appearance.
A ladder logic program consists of a number of rungs, on which you place
instructions. Instructions each have a data address associated with them and based
on the status of these instructions the rung is solved.