Book Image

Learning RSLogix 5000 Programming

Book Image

Learning RSLogix 5000 Programming

Overview of this book

RSLogix 5000 and Studio 5000's Logix Designer are user-friendly interfaces used for programming the current generation of Rockwell Automation Controllers including ControlLogix, CompactLogix, and SoftLogix. When engineering automation solutions using Logix, it is important to study the changes to the platform introduced with Studio 5000 and the various controllers, modules, and form factors available today. RSLogix 5000 programming packages help you maximize performance, save project development time, and improve productivity. This book provides a detailed overview of the Logix platform including ControlLogix, CompactLogix, and SoftLogix and explains the significant changes introduced in Studio 5000. A clear understanding of the recent Logix platform changes is critical for anyone developing a Rockwell Automation solution. It provides an easy-to-follow, step-by-step approach to learning the essential Logix hardware and software components and provides beginners with a solid foundation in the Logix platform features and terminology. By the end of this book, you will have a clear understanding of the capabilities of the Logix platform and the ability to navigate the Rockwell Automation Literature Library Resources.
Table of Contents (18 chapters)
Learning RSLogix 5000 Programming
Credits
About the Author
About the Reviewers
www.PacktPub.com
Preface
Rockwell Automation Literature Library Resource
Index

Tuning a Logix controller


Logix provides methods for monitoring and tuning the performance of the projects running on a controller. In the next sections, we will explore some of the available options.

System overhead time slice

The system overhead time slice is a controller setting that allows the specification of the percentage of time dedicated to the ongoing background tasks. These on-going background tasks are also known as unscheduled communications and will always require a percentage of the controller's processing power.

Logix unscheduled communications include the following features:

  • Programming and device monitoring communication with Logix Designer / RSLogix

  • Service communication

  • Communication with the HMI devices

  • Controller to controller communication

  • Synchronize redundant controllers

  • I/O connections health monitoring and connection re-establishment

The system overhead time slice only has an impact when a continuous task is configured in a project. When no continuous task is present, the...