Rockwell Automation Logix5000 Logix5000 Controllers Quick Start - Manual (Page 20)

20 Publication 1756-QS001E-EN-P - October 2009
Chapter 1 Program and Test a Simple Project
Enter Ladder Logic
One way to enter logic is to drag buttons from a toolbar to the desired location.
To add ladder logic, drag the button for the rung or instruction directly to the desired location. You can enter
your logic and leave the operands undefined. After you enter a section of logic, go back and assign the
operands.
EXAMPLE
In the following example, an Examine If Closed (XIC) instruction checks the on/off state of a pushbutton. If
the pushbutton is on, the Output Energize (OTE) instruction turns on a light.
A green dot shows a valid placement location
(drop point).
XIC
If this bit is on…
OTE
…turn on this bit. Otherwise,
turn off this bit.