Rockwell Automation Logix5000 Logix5000 Controllers Quick Start - Manual (Page 68)

68 Publication 1756-QS001E-EN-P - October 2009
Chapter 5 Program a Project Offline
Enter Ladder Logic
To enter ladder logic, you have the following options:
Quick keys – Assign a logic element (rung,
branch, instruction) to a keyboard key. To add an
element to the right or below the cursor, press the
designated key for the element.
ASCII text – Use ASCII text to enter or edit logic.
A tool tip helps you enter the required operands.
ASCII text typically uses the following format:
mnemonic operand_1 operand_2
Rung XIC
Branch
Branch Level
XIO OTE OTU OTL
More Instructions
Drag and drop logic elements – Use the
Language Element toolbar to drag and drop a rung,
branch, or instruction to your routine.
Interlace input and output instructions – The last instruction
on the rung must be an output instruction.
Outputs in series – Place multiple output instructions in
sequence (serial) on a rung.
Leave operands undefined – enter logic without defining
operands. RSLogix 5000 software lets you enter and save logic
without assigning operands. This lets you develop your logic in
iterations and save libraries of code for re-use.
Parallel branches – No limit to the number of parallel branches
on a rung (nest up to 6 levels).