We can all agree that technology is one form of evolution of the human race. We are continually trying to reinvent ourselves by creating advancements that could help users be more productive and efficient than before.

As a result, we make our lives simpler and get faster results. The main idea of inventions is their applicability to our ordinary lives. One of the inventions that changed the game of industrial automation is PLC or programmable logic controller.

It is one of the most common automation controllers in numerous industries; however, people still do not know anything about it.

If you wish to learn more about its programming, you should check out this site: https://onlineplcsupport.com/ladder-logic-tutorial-studio-5000/ for more information.

What is a Programmable Logic Controller (PLC)?

The programmable logic controller is a rugged and sturdy device that can easily handle and control numerous automated processes. In simpler terms, it is a digital computer specifically made to perform various control functions.

Generally, it monitors input devices, uses already pre-programmed logic with an idea to set in motion various output devices. As a result, we get automated tasks that are most common in manufacturing plants.

Since it is a microcomputer, the only way to use it is to have all its essential components at a single place.

Therefore, if you wish for your programmable logic controller to operate appropriately, it needs to have a processor, input assembles, mounting or rack, output assembly, and programming unit or device.

The main idea is to implement the proper programming so that you can control both inputs and outputs depending on your automation process. Generally, the PLC will send signals to input devices by using connector rails. The signals will enter the memory that each controller features.

On the other hand, the programming device is the separate computer used for creating a particular programming process. Then, the processor or CPU will use the instructions based on your programming and control the output devices as a result.

Since programmable logic controllers are personal computers used in industrial settings, the programming, in most cases, uses monitors and sensors. However, you will be able to use it to utilize a control system so that you can control the particular automation process.

They are a common solution for building the processes and systems within some industries. More common applications include traffic lights and washing machines, among other things.

PLC Programming Languages

We have mentioned above that a PLC is a sophisticated device used in numerous industries so that you can maintain and monitor automated processes in factories, plants, and other areas.

The main reason for that is that it is simple to use and due to its reliability because it can withstand harsh industrial conditions.

However, it will not be able to function without specific and particular programming, and you will not be able to program anything without understanding the programming languages used to make specific tasks.

In further text, we will explain to you the most common PLC programming languages:

Ladder Logic – One of the most essential and first programming language used for PLC programming in ladder logic. The main reason for its importance is the ability of engineers to handle it that it uses the circuit terminology. It is created so that plant technicians and engineers can easily transit from relay logic, which was the standard solution back in the day. The graphical language resembles electric circuits, which is an utterly different solution compared with other programming languages used outside the industrial applications.

Sequential Flow Chart – SFC is a type of language that uses symbols as a way to create some instruction based on your needs. According to some programmers, it is the most convenient and straightforward language because it depends on logical decisions. Of course, for PLC languages, you can find a wide array of symptoms, including input/output, connector, terminator, and many more.

Structured Text – STX or ST in the form of PLC programming languages that uses particular statement lists to create instructions. It is not that common and remembers that only a few brands of PLC are using it. However, it is a highly flexible solution for users, but it is not as simple to understand and follow as logic symbols and ladder diagrams. The main goal was for some brands to differentiate their instructions from others, which is the main reason why people learn it in the first place.

Instruction Lists – We are talking about another PLC programming language that uses the symbolic form as the best way to describe and create automation. It requires less memory compared with other languages that you can use for a programmable logic controller.

Function Block – Finally, this is another graphical language, and the main reason for its popularity is that it is simple to use it similarly as Ladder Logic. You will be able to identify it with ease because it uses boxes that feature lines of codes, which is a unique perspective to future programmers.

Things You Should Learn To Become A PLC Programmer

Since most industries are currently using programmable logic controllers for handling automation systems, the market is in demand for professional and skilled PLC experts that could program, design, maintain, and commission them.

Remember that every single automation process is different and unique compared with another. Therefore, the professional should know how to program it and how to make sure that the program is running correctly without the downtime and potential issues.

Every plant and factory requires a professional in the world of programmable logic controllers, which is why you can pursue this particular career. You should check here to learn more about PLCs in general.

Requirements for PLC Engineer

Understanding of Digital Technology – The first thing you should understand includes the processes of Number systems, Boolean logic, as well as the ability to recognize different graphical presentations that are common in Engineer schools.

Microprocessor Technology – This particular subject is common, and if you obtain the engineering degree, you will be able to understand the differences between various microprocessors and their functionality. If you plan to graduate in electronics or mechatronics, you will need to understand the application programming as well as Low level Assembly Code. That will give you a proper foundation so that you can understand both PLC internal programming and hardware.

Logic Development – Finally, this particular aspect is something that every single engineer should know because you will have to be able to solve problems before they even happen. You can use various languages and codes from Statement Logic and Ladder Logic, which will provide you a chance to read the information from PLC in real-time so that you can troubleshoot it in case something happens.

PLC Software Languages – Everything depends on the brand of controller you wish to use and control, but generally, you should learn Ladder Logic. That way, you will be able to understand how to use particular software and create necessary automated actions in real-time. The software comes with the ability to simulate performance, which will help you reduce the chances of mistakes before you implement it in a real system.

Control Hardware – We are talking about knowledge on how Inputs and Outputs work in combination with PLC hardware. That way, you will be able to troubleshoot it as soon as possible in case something happens to reduce the expensive downtime that can happen in manufacturing plants.