PLC Programming for Refrigerator, AC and Heat Pump

Name: PLC Programming for Refrigerator, AC and Heat Pump
Rating: 4.1 (18 reviews)

PLC Programming with Function Block Diagram

Created by훈상 (Hoon-Sang) 윤 (Yun)

Last updated 7/2020

English

What you'll learn

What a basic electrical circuit is
What a self holding circuit is and how to configure it
How to construct auto and manual program at the same time
The procedure to deal with analog signals.
Functions we can build with timer
What we can do with counter?
A way to control inverter compressor with PID controller
Manipulating an EXV(Electrical Expansion Valve ) with PID controller
Programs for operating many devices
Interlocks
What the defrost is and how to configure it with PLC
How to finish the defrost function with the evaporator temperature

Course content

1 section • 11 lectures • 2h 13m total length

1st_Basic Electric Circuit14:40
We will discuss about "Basic Electric Circuit" in this section. You can understand about how to build it with function block diagram one of PLC standard languages. And you will see how to do simulation and how to check your program with a basic human machine interface (HMI) provided by the freeware, CODESYS V3.5 development.
2nd_Self Holding Circuit9:07
We will study about the "Self-Holding Circuit" which makes the signal steady even though its trigger switch is not pressed. You can understand about how to build it with function block diagram one of PLC standard languages. And you will see how to do simulation and how to check your program with a basic human machine interface (HMI) provided by the freeware, CODESYS V3.5 development.
3rd_Auto, Manual Operation12:13
We need to provide the manual functions as well as the auto operation just in case any device or equipment is out of control. You can understand how to configure auto and manual program at the same time with this session. Software simulation with HMI will give you clear picture of the automatic system’s operation.
4th_Dealing with Analog15:24
There are some rules we need to understand how to use analog signals in the PLC programs. In this section, you will get idea about how to deal with them. For example, you can see the actual ways to scale, un-scale, convert integer variable to real and vise versa. And, of course, you will see the actual program and simulation.
5th_Timer14:29
In this section, you will see how to use timer which is one of favorite function blocks for automatic engineers. We will discuss how to use timer such as configuring alarms, arranging starting order among equipment or devices. There is a program example including simulation of it.
6th_Counter11:16
A counter function block is one of necessary item for you to program what you want easily and efficiently. In this section, you will get information about 2 ways to use it. And there is a practical program example with simulation.
7th_PID-Inverter Compressor13:22
The PID function block (FB) is popular to handle a feedback loop with analog output signal. After taking this section, we will understand how to use PID FB properly. And there is an example for programming and doing simulation.
8th_PID-Superheat6:50
To control superheat is one of mission for engineers working in the refrigeration field. In this section will explain to you about how to use a PID FB for operating an electric expansion valve (EXV) to control the superheat. You will see an actual example for programming and simulation.
9th_Handling Many Devices13:49
Now, it is time to learn how to operate many devices or equipment in a harmonic way. You will get introduced about building programs easily and simply but satisfyingly. There is a practical programming example with its simulation.
10th_Configuring Interlocks9:37
What if you need to add some critical alarms such as fire alarm, emergency shutdown switch and so on? This section will let you know how to add them easily and simply. There is a programming example and its simulation. You will be able to understand what the interlock is and how to build it with PLC program with this section.
11th_Defrost12:59
The defrost is daily function for any refrigeration system whose working temperature is near 0℃. In this section, we will discuss about the basic periodic defrost function program. And we will study about how to configure the PLC program for finishing the defrost function according to the actual evaporator’s temperature. There is a practical example for you to do programming and simulation.

Requirements

Basic understanding for the refrigerator, AC or Heat pump
A PC with CODESYS V3.5 Development program which is free.

Description

This lecture includes all knowledge and know-how I have gotten while working as an automatic control engineer since 2007. I tried to explain as much as I can about the new and best tactics used in the actual field. So, I organized agenda useful for not only beginners but experts who know almost everything about systems like refrigerator, air-conditioner (AC) and heat pump except for the automatic control. For example, you can feel that they are my daily issues I need to handle while working as an engineer or a technician in those field after checking the topics.

I did my best to explain about the PLC (Programmable Logic Controller) program as easy as possible with minimum functions. I bet that this lecture will be incredibly helpful for you not only when you reviewing the others’ program but making your own program.

You will understand about the below after this lecture.

l What a basic electric circuit is and how to build it with PLC program
l How to make self-holding circuit program
l A way to configure auto and manual operation program at the same time
l A procedure for dealing with analog signals to be used in PLC program
l What a timer is and what kinds of functions we can make with it
l How to use a counter for refrigerator, AC or heat pump
l How to control an inverter compressor
l What is a tactic to manipulate an electronic expansion valve (EXV)
l Dealing with a system made up of many devices
l How to stop a system with interlock signals such as emergency stop button, fire alarm and so on
l How to make programs for defrost

I hope you will enjoy your program work after taking lecture. And if you have any topic you want me to explain, please let me know through feedback or email. Good luck.

Who this course is for:

Students who are majoring automation
Students who want to know about the control program for refrigerator, AC or Heat pump
Beginner level engineers working in the field of refrigerator, AC or Heat pump
Someones willing to work for refrigerator, AC or Heat pump field
Automatic engineers who want to transfer refrigerator, AC or Heat pump field
Engineers who need to manage outside research and development company