Learning PLC Ladder Logic: 1 The Basics

Course details

Industrial automation technologies have made manufacturing processes increasingly more efficient. Programmable logic controllers (PLCs) are commonly used in industrial automation, and many of these industrial computer control systems use ladder logic as their main programming language. In this course, engineer and educator Zahraa Khalil covers the basics of PLC ladder logic programming. Explore fundamental concepts such as rung operation, timer and counter instruction, and the main types of input and output instructions used in ladder logic programming. Along the way, Zahraa shares case studies that can help you grasp the real-world application of these concepts.

Learning objectives
Input and output instructions
Field devices and program instructions
Adding multiple inputs using AND and OR methods
Adding multiple outputs
What branching means in ladder logic
Using latch/unlatch output instructions
Timer and counter instructions

Concepts

0. Introduction

01 - Program PLCs with ladder logic
02 - What you should know

1. PLC Programming

03 - PLC programming languages
04 - LogixPro PLC simulation software

2. Ladder Logic Basics

05 - Programming concept
06 - Input instructions
07 - Output instructions
08 - I O with a push button and light
09 - I O with alternating lights
10 - Field devices and program instructions
11 - Normally open (NO) contact with XIC and XIO
12 - Normally closed (NC) contact with XIC and XIO

3. Rung Operation

13 - Multiple inputs
14 - Example of multiple inputs (AND and OR)
15 - Multiple outputs
16 - Seal-in and hold-in instruction
17 - Branching operation and examples
18 - Rung operation case study, part 1
19 - Rung operation case study, part 2
20 - Multiple I O case study
21 - Latch unlatch output
22 - Latch unlatch example

4. Timers and Counters

23 - Timer instruction overview
24 - Timer status bits (EN, DN, and TT)
25 - Timer types (TON and TOF) and diagrams
26 - Use a timer to flash a light
27 - Counter instruction
28 - Examples of counter types
29 - Counter and timer case study

5. Detailed Case Study - Plywood Sheets Process

30 - Case overview
31 - Part 1 - Counting sheets
32 - Part 2 - Running the conveyer
33 - Part 3 - Applying paint
34 - Part 4 - Programming the second conveyer
35 - Ladder logic program simulation
36 - Part 5 - Add stops to complete the program

Conclusion

37 - Next steps