Book Image

Industrial IoT for Architects and Engineers

By : Joey Bernal, Bharath Sridhar
Book Image

Industrial IoT for Architects and Engineers

By: Joey Bernal, Bharath Sridhar

Overview of this book

When it comes to using the core and managed services available on AWS for making decisions about architectural environments for an enterprise, there are as many challenges as there are advantages. This Industrial IoT book follows the journey of data from the shop floor to the boardroom, identifying goals and aiding in strong architectural decision-making. You’ll begin from the ground up, analyzing environment needs and understanding what is required from the captured data, applying industry standards and conventions throughout the process. This will help you realize why digital integration is crucial and how to approach an Industrial IoT project from a holistic perspective. As you advance, you’ll delve into the operational technology realm and consider integration patterns with common industrial protocols for data gathering and analysis with direct connectivity to data through sensors or systems. The book will equip you with the essentials for designing industrial IoT architectures while also covering intelligence at the edge and creating a greater awareness of the role of machine learning and artificial intelligence in overcoming architectural challenges. By the end of this book, you’ll be ready to apply IoT directly to the industry while adapting the concepts covered to implement AWS IoT technologies.
Table of Contents (19 chapters)
1
Part 1:An Introduction to Industrial IoT and Moving Toward Industry 4.0
6
Part 2: IoT Integration for Industrial Protocols and Systems
11
Part 3:Building Scalable, Robust, and Secure Solutions

PLC programming – ladder diagrams

Let’s build on our understanding from Chapter 5, OT and Industrial Control Systems. We have seen that ladder diagrams are the most popular frame of PLC programming adopted in the industry and they have evolved from electrical relay diagrams. The two vertical lines represent the power and ground, and each rung (horizontal line) represents the logic to complete the circuit conditionally. Contacts and coils form the two major components in each rung. A contact usually represents input while output is represented by a coil. If a path can be established from the left side of the rung through the asserted contacts to the right side, then the rung is true, and the output is asserted. If the path cannot be followed, then the actuator remains un-energized, thus deeming the rung false.

Important note

Contacts can also have outputs, which we will discover via an example in the last section of this chapter.

Let’s take the following...