Rockwell Automation Logix5000 Logix5000 Controllers Quick Start - Manual (Page 52)

52 Publication 1756-QS001E-EN-P - October 2009
Chapter 3 Program Add-On Instructions
Insert an Add-On Instruction
You can create an Add-On Instruction in a ladder, function block, or structured text routine.
1. Open the routine that will use the instruction.
2. Click the Add-On tab of the Language Element toolbar.
3. Drag the instruction from the toolbar to the routine.
4. Enter the parameters.
Routine Type Parameters
Ladder Single question mark — Required parameter. Enter a tag.
Single and double question marks — Required parameter. Enter a
tag.
Only double question marks — Not a required parameter. You can
either:
• leave it blank and use the default value.
• if it’s an input value, enter a different value.
Function block Nub on the end of a pin — Required parameter. Wire the pin to an
IREF, OREF, connector, or another block.
Single question mark — Required parameter. Enter a tag.
No nub on the end of a pin — Not a required parameter.
Structured text The instruction takes only the required parameters. Enter a tag for
each parameter.
TIP
For help with an instruction, select the instruction and then press [F1]. In structured text, make sure the
cursor is in the blue instruction name.