Rockwell-automation Logix5000 Controllers Add-on Instructions Programm Manual de usuario descargar pdf (Pagina 78)

Chapter 3 Using Add-On Instructions

5. Define arguments for each Parameter on the instruction call.

The instruction appears as follows in each of the languages.

Ladder Diagram:

Parameter With Description

Single question mark This is a required InOut parameter. Enter a tag.

Single and double question marks This is a required Input or Output parameter. Enter a tag.

Double question marks

This is not a required parameter. You can either:

• Leave as is and use the default value.

• Enter a different value if it’s an Input parameter.

Function Block Diagram:

Item Description

Nub on the end of pin

This is a required Input or Output parameter.

You must wire the pin to an IREF, OREF, connector, or another

block to verify.

Single question mark This is a required InOut parameter. Enter a tag.

No nub on the end of pin

This is not a required parameter.

You can either:

• Leave as is and use the default value.

• Enter a different value if it’s an Input parameter.

78 Rockwell Automation Publication 1756-PM010F-EN-P - October 2014

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Rockwell-automation Logix5000 Controllers Add-on Instructions Programm Manual de usuario Pagina 78