Book Image

Industrial Automation from Scratch

By : Olushola Akande
Book Image

Industrial Automation from Scratch

By: Olushola Akande

Overview of this book

Industrial automation has become a popular solution for various industries looking to reduce manual labor inputs and costs by automating processes. This book helps you discover the abilities necessary for excelling in this field. The book starts with the basics of industrial automation before progressing to the application of switches, sensors, actuators, and motors, and a direct on-line (DOL) starter and its components, such as circuit breakers, contactors, and overload relay. Next, you'll explore VFDs, their parameter settings, and how they can be wired and programmed for induction motor control. As you advance, you'll learn the wiring and programming of major industrial automation tools – PLCs, HMIs, and SCADA. You’ll also get to grips with process control and measurements (temperature, pressure, level, and flow), along with analog signal processing with hands-on experience in connecting a 4–20 mA transmitter to a PLC. The concluding chapters will help you grasp various industrial network protocols such as FOUNDATION Fieldbus, Modbus, PROFIBUS, PROFINET, and HART, as well as emerging trends in manufacturing (Industry 4.0) and its empowering technologies (such as IoT, AI, and robotics). By the end of this book, you’ll have gained a practical understanding of industrial automation concepts for machine automation and control.
Table of Contents (21 chapters)
1
Part 1: Learning the Concepts and Skills Required to Get Started
8
Part 2: Understanding PLC, HMI, and SCADA
14
Part 3: Process Control, Industrial Network, and Smart Factory

Using an output address as an input in a program

In the previous chapter, we learned that an output address can be used as an input address (NC or NO contact) in the rules for ladder diagram programming.

The following example shows an output address (Q0.2) being used for an input. You can write the program in network 4 and simulate the program to see how it works.

Figure 9.31 – Output address (Q0.2) used for a normally open (NO) contact at the input

Figure 9.31 – Output address (Q0.2) used for a normally open (NO) contact at the input

The wiring diagram for the program is as follows:

Figure 9.32 – Wiring diagram to implement a program using an output address for input

Figure 9.32 – Wiring diagram to implement a program using an output address for input

Let’s say a pilot lamp (PL3) is connected to Q0.3, as shown in the preceding diagram.

Anytime Q0.2 is ON, the normally open contact with the address Q0.2 will be closed since the coil with the address Q0.2 is energized and PL3 connected to Q0.3 will be ON.

If we edit the program by replacing the normally open contact...