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Enter ladder logic – Rockwell Automation Logix5000 Logix5000 Controllers Quick Start User Manual

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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.

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