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Learning RSLogix 5000 Programming

You're reading from   Learning RSLogix 5000 Programming Build robust PLC solutions with ControlLogix, CompactLogix, and Studio 5000/RSLogix 5000

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Product type Paperback
Published in Jul 2020
Publisher Packt
ISBN-13 9781789532463
Length 384 pages
Edition 2nd Edition
Tools
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Author (1):
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Austin Scott Austin Scott
Author Profile Icon Austin Scott
Austin Scott
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Table of Contents (21) Chapters Close

Preface 1. Section 1: Introduction to RSLogix
2. The History of Rockwell Automation Technologies FREE CHAPTER 3. Understanding ControlLogix 4. Understanding CompactLogix 5. Understanding SoftLogix 6. Understanding Logix Emulate 5000 7. Section 2: Logix Programming Basics
8. Industrial Network Communications 9. Configuring Logix Modules 10. Writing Ladder Logic 11. Writing Function Block 12. Writing Structured Text 13. Building Sequential Function Charts 14. Section 3: Advanced Logix Programming
15. Using Tasks and Programs for Project Organization 16. Faults and Troubleshooting in Logix 17. Understanding Cybersecurity Practices in Logix 18. Building a Robot Bartender in Logix 19. Assessments 20. Other Book You May Enjoy

Learning about UDTs

UDTs are object-based constructs that allow you to create custom structures containing a number of different data types. UDTs are used to organize data into objects that align with the properties of physical-world equipment. In the case of fault trapping, we will be using a UDT to capture the details of a major fault, which is covered in the next section.

Trapping a fault

In the following exercise, we will trap a major fault and clear it before the controller stops the previously mentioned steps:

  1. In order to trap a major fault, we must create a User-Defined data type to store the fault information.

  1. In the Data Type window that appears, creates the followingFAULTRECORD UDT:

  1. We will need to add an instance of our newly created FAULTRECORD UDT to our project at the MainProgram scope level:

...

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